SPECIFIER’S

GUIDE
CALMARK™ RETAINERS
 TABLE OF CONTENTS
Overview of Calmark Channel-Lok Products
Overview...................................................................Page 2, 3 Series 227 & 228 ................................................Page 58, 59
Product Selection Guide ..........................................Page 4
Requirements ..............................................................Page 5 Retainers
Series 125/126 & 165/166 .....................................Page 60
Conduction Cooling Products Series NW125/NW126 & NW165/NW166........Page 61
Conduction Cooled Assemblies .......................Page 6, 7
Conduction Cooled Keying ................................Page 8, 9 Card Guides
Series 115-287 ..........................................................Page 62
Card-Lok Products Series 120 & C120.....................................................Page 63
Series 223 & 224 ................................................ Page 10, 11
Series 225............................................................. Page 12, 13 Extractors, Nylon
Series E225 .......................................................... Page 14, 15 Series 101 to 108...............................................Page 64, 65
Series L225 .......................................................... Page 16, 17
Series 226............................................................. Page 18, 19 Extractors, Metal
Series 230............................................................. Page 20, 21
Series 107.............................................................Page 66, 67
Series 231............................................................. Page 22, 23
Series 109....................................................................Page 68
Series 235 ............................................................ Page 24, 25
Series 236 ............................................................ Page 26, 27
Series 240............................................................. Page 28, 29 References
Series 245............................................................. Page 30, 31 Technical Applications ...........................................Page 69
Series 250 ............................................................ Page 32, 33 Clamping Force Data - Card-Loks.......................Page 70
Series 255............................................................. Page 34, 35 Thermal Resistance - Card-Loks..........................Page 71
Series 260 ............................................................ Page 36, 37 Mounting & Installation for Card-Loks..............Page 72
Series L260 .......................................................... Page 38, 39 Theoretical Discussion of Card-Loks
Series LE260 ....................................................... Page 40, 41 and Inserter Extractors ...................................Page 73
Series 261 ............................................................ Page 42, 43 Material & Finishes ..................................................Page 74
Series 263 ............................................................ Page 44, 45 Technical Reference Data .............................. Page 75-83
Series 264 ............................................................ Page 46, 47 DSCC Cross Reference ............................................Page 84
Series 265 ............................................................ Page 48, 49 Glossary ......................................................................Page 85
Series 266 ............................................................ Page 50, 51
Series 267............................................................. Page 52, 53
Series 280 ............................................................ Page 54, 55
Series 281 ............................................................ Page 56, 57

www.calmark.com • 800-854-7086 2
 Overview
Calmark, the home of the Card-Lok, designs and manufactures Water Segment – a global leader in providing innovative products and
rugged printed circuit board guides, conduction frame assemblies and systems used world wide in the movement, treatment, storage and
extractors for use in non-benign - airborne, shipborne, and rugged land enjoyment of water.
transportation - environments.
Equipment Protection Segment – is a leader in the global enclosures
Today, Pentair markets the Calmark brand of products along with Birtcher™ market, designing and manufacturing standard, modified, custom, thermal
globally and Schroff® in the Americas, while complimenting these standard enclosures that house and protect sensitive electronics and electrical
product brands with its own customer-specific enclosure capabilities. components.

Pentair brands are market specific (see below) and are complimented by
Pentair is a manufacturer of standard, modified standard and customer the groups’ thermal division which supports all markets.
specific enclosure systems: capabilities range from backplane design, to
NEBS enclosures, to outdoor (Telecordia compliant) aluminum enclosures,
to high volume stamped chassis, and systems integration.

Pentair, Inc. (PNR-NYSE) is a highly successful, diversified corporation

consisting of two core business goups.

EQUIPMENT PROTECTION WATER SEGMENT

SEGMENT

ELECTRICAL, INDUSTRIAL
THERMAL ELECTRONICS
& COMMERCIAL
MARKETS MARKETS
MARKETS

3 www.calmark.com • 800-854-7086
Overview

www.calmark.com • 800-854-7086 4
 Product Selection Guide
Card-Lok
Product 3 or Actuation Profile Width (nominal) x Profile Height Length Approximate Recommended DSCC DSCC
Series 5 pc. Relaxed Height (max) Expanded (min) Clamping Torque Setting CID
(min) Force2 N(lbs) N-cm (in-lbs)
223 5 Screw 5.72 (.225) x 6.86 (.270) 8.26 (.325) 71.12 (2.80) tbd limited
224 5 Screw 5.33 (.210) x 7.24 (.285) 8.64 (.340) 71.12 (2.80) tbd limited
225 3 Screw 5.72 (.225) x 6.86 (.270) 8.26 (.325) 54.61 (2.15) 489 (110) 68 (6) 84103 59590
E225 3 Screw 5.72 (.225) x 6.86 (.270) 8.26 (.325) 71.12 (2.80) 489 (110) 68 (6)
L225 3 Lever 5.72 (.225) x 6.86 (.270) 8.26 (.325) 54.61 (2.15) 533 (120) N/A
226 5 Screw 5.72 (.225) x 6.86 (.270) 8.26 (.325) 121.92 (4.80) 800 (180) 68 (6) 89064 59789
230 3 Screw 5.59 (.220) x 5.72 (.225) 6.99 (.275) 54.61 (2.15) 489 (110) 68 (6) 84103 59590
231 5 Screw 5.59 (.220) x 5.72 (.225) 6.99 (.275) 121.92 (4.80) 800 (180) 68 (6) 89064 59789
235 3 Screw 5.84 (.230) x 7.32 (.288) 8.64 (.340) 71.12 (2.80) 445 (100) 68 (6)
236 5 Screw 5.84 (.230) x 7.32 (.288) 8.64 (.340) 147.32 (5.80) 800 (180) 68 (6)
240 3 Screw 6.10 (.240) x 4.57 (.180) 5.59 (.220) 54.61 (2.15) 489 (110) 68 (6) 84103 59590
245 3 Screw 6.60 (.260) x 6.86 (.270) 8.26 (.325) 54.61 (2.15) 622 (140) 113 (10) 59590
250 3 Screw 9.53 (.375) x 9.78 (.385) 11.94 (.470) 63.50 (2.50) 1111 (250) 227 (20) 59590
255 3 Screw 12.70 (.500) x 11.68 (.460) 15.24 (.600) 54.61 (2.15) 1778 (400) 351 (31) 59590
260 5 Screw 6.35 (.250) x 6.26 (.270) 8.26 (.325) 54.61 (2.15) 1778 (400) 68 (6) 89024
261 3 Screw 6.35 (.250) x 6.26 (.270) 8.26 (.325) 54.61 (2.15) 667 (150) 68 (6) 59789
L260 5 Lever 6.35 (.250) x 6.26 (.270) 8.26 (.325) 54.61 (2.15) 556 (125) N/A 59789
LE260 5 Lever 6.35 (.250) x 6.26 (.270) 8.26 (.325) 54.61 (2.15) 556 (125) N/A 59789
263 5 Screw 6.35 (.250) x 7.44 (.293) 8.89 (.350) 54.61 (2.15) 1778 (400) 68 (6)
264 3 Screw 6.35 (.250) x 7.44 (.293) 8.89 (.350) 54.61 (2.15) 667 (150) 68 (6) 59789
265 5 Screw 5.72 (.225) x 5.84 (.230) 7.37 (.290) 54.61 (2.15) 1556 (350) 68 (6)
266 3 Screw 5.72 (.225) x 5.84 (.230) 7.37 (.290) 54.61 (2.15) 600 (135) 68 (6)
267 5 Screw 6.35 (.250) x 5.00 (.197) 5.99 (.236) 54.61 (2.15) 1556 (350) 68 (6)
280 5 Screw 9.27 (.365) x 9.65 (.380) 11.68 (.460) 60.96 (2.40) 3334 (750) 227 (20) 59789
281 3 Screw 9.27 (.365) x 9.65 (.380) 11.68 (.460) 60.96 (2.40) 1245 (280) 227 (20)

Channel-Lok
Product 3 or Actuation Width x Height (max) Board Thickness Length1 Approximate Recommended
Series 5 pc. (min) Clamping Torque Setting
Force N (lbs)
2
N-cm (in-lbs)
227 3 Screw 12.57 (.495) to 8.89 (.350) 1.14 (.045) to 2.62 (.103) 76.20 (3.00) 489 (110) 68 (6)
228 5 Screw 12.57 (.495) to 8.89 (.350) 1.14 (.045) to 2.62 (.103) 101.6 (4.00) 801 (180) 68 (6)

Retainers & Card Guides

Product Series Material Conductive Application Board Thickness Length1 (min) UL rating
125/126 CR Yes Sheet Metal 1.6 (.063) & 2.4 (.094) 31.75 (1.25) to 311.15 (12.25) N/A
165/166 BeCu Yes Sheet Metal 1.6 (.063) & 2.4 (.094) 31.75 (1.25) to 311.15 (12.25) N/A
NW125/NW126 CR Yes Cold Wall N/A 31.75 (1.25) to 311.15 (12.25) N/A
NW165/NW166 BeCu Yes Cold Wall N/A 31.75 (1.25) to 311.15 (12.25) N/A
120 Nylon No Sheet Metal 1.6 (.063) & 2.4 (.094) 101.60(4.00),152.40(6.00),177.8(7.00),215.90(8.50),241.30(9.50) V-2 (V-0 available)
C120 Polycarbonate Yes Sheet Metal 1.6 (.063) & 2.4 (.094) 101.60(4.00),152.40(6.00),177.8(7.00),215.90(8.50),241.30(9.50) V-2 (V-0 available)

Nylon Extractors & Inserter-Extractors Metal Extractors & Inserter-Extractors

Product Material Function4 Mechanical Board Thickness UL Rating Product Material Function4 Mechanical Board Thickness
Series Advantage Series Advantage
1.6 (.063) & 1.6 (.063), 2.4 (.094) &
107 Glass-filled Nylon I&E 4.5:1 V-0 107-35 Al I&E 5.5:1
2.4 (.094) 3.2 (.125)
107-10 Glass-filled Nylon I&E 3.3:1 1.6 (.063) & V-0 1.6 (.063), 2.4 (.094) &
2.4 (.094) 107-50 Al I&E 4.5:1 3.2 (.125)
1.6 (.063) & V-2 1.6 (.063), 2.4 (.094) &
107-20 Glass-filled Nylon I, E & L 4.5:1 107-51 Al I&E 3.3:1
2.4 (.094) (V-0 available) 3.2 (.125)
107-30 Glass-filled Nylon I&E 5.5:1 1.6 (.063) V-0 1.6 (.063), 2.4 (.094) &
107-55 Al I&E 8.0:1
1.6 (.063) & 3.2 (.125)
107-40-3 Glass-filled Nylon I&E 4.5:1 2.4 to 3.2 (.094 to .125) V-0 1.6 (.063), 2.4 (.094) &
107-73 Al I, E & L 4.2:1
Glass-filled Nylon 1.6 (.063), V-0 (Inserter- 3.2 (.125)
107-70 Latch - Nylon I, E & L 4.5:1 2.4 (0.94) & Extractor) 1.6 (.063), 2.4 (.094) &
3.2 (.125) V-2 (Latch) 107-75 Al I, E & L 7.0:1 3.2 (.125)

109 Al or CR E 4.5:1 1.6 (.063), 2.4 (.094) &

3.2 (.125)5

1-Other assembly lengths available upon request 2-Clamping forces based on Chemical Film Option – Other finishes and options will yield different results
3-101 available in 1.6 (.063) only 4-Function: E=Extract I=Insert L=Latch or Lock 5-Units are metic (inch)

5 www.calmark.com • 800-854-7086
 Requirements
Finish & Plating
The Calmark product line offers a wide variety of standard finishes for products. Most of the components are made of aluminum or stainless steel.
The standard finishes are:
For Aluminum, standard finishes include: For BeCu, standard finishes include:
• Chemical Film per Mil-DTL-5541 Type 1 (non-RoHS) Class 1A or 3, Gold • Tin Plate per Mil-T-10727 Type I, Bright
• Chemical Film per Mil-DTL-5541 Class 3, Type I, Gold for Shafted Products • Nickel Plate per QQ-N-290 Class I, Grade F
• Chemical Film per Mil-DTL-5541 Class 3, Type II, Clear • Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
• Black Anodize per Mil-A-8625 Type II, Class 2 • Zinc Plate per ASTM-B633 Type III (Clear), SC1
• Hard Black Anodize per Mil-A-8625 Type III, Class 2 For Nylon card guides and extractors:
• Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright • Color coding is available for Natural/White card guides and extractors
For Stainless steel, standard finish is: • Standard colors are BLK and Natural; other colors avalailable upon
• Passivation per AMS 2700 request.

RoHS - Restriction of Hazardous Substances

The Calmark product line offers several product configurations to meet the requirements of the European Directive 2002/95/EC for Restriction of Hazardous
Substances. This European Directive affects primarily the aluminum components that are finished with a gold chemical film process. This process uses a
hexavalent chromium (Cr+6). An option for clear chemical film process using a trivalent chromium (Cr+3) has been added for those needing to meet this
requirement. Contact one of our applications engineers for more details regarding the RoHS requirements of specific items.

DFARS 252.225-7014 & Alt 1. Preference for Domestic Specialty Metals Clause
Calmark products can support the needs of Prime Contractors and Subcontractors supplying product to the DOD, particularly the Preference for Domestic
Specialty Metals Clause. This clause is applicable to DOD Prime Contract Awards exceeding the simplified acquistion threshold, of products, components and
assemblies for use in Aircraft, Missile and Space Systems, Ships, Tank and Automotive Items, Weapon Systems or Ammunition. For the Calmark product line,
this affects the hardware, components and materials that are made of stainless steel. At the time of this writing, all COTS items which include all part numbers
configurable in this catalog are exempt from the Preference for Domestic Specialty Metals Clause for Prime Contract Awards after October 25, 2007. Fastener
DNAD waivers are also available for Prime Contract Awards between April 10, 2007, and July 26, 2008. There are many other exemptions available.
We recognize that each of our customers has a different method for handling this requirement, so we have implemented a process that we feel will handle the
great majority of our customers’ requirements. Because at this time, the Class Deviations are not retro-active, in order to best respond to your needs, we do
require that all quotations and purchase orders note this requirement along with the Prime Contract Number. We do charge for a signed DFARS 252.225-7014
& Alt 1. Statement Sheet that must go along with your order. For those customers that can use the COTS exemption, we offer free of charge documents that
you can download from our website. The Product Sheets will indicate from the Statement Sheet which statement applies for your product of interest. If these
documents meet your needs, please indicate this in your quotation or P.O. Of course, for those customers that need a signed Statement Sheet, we can also
accomodate this requirement at an additional fee.

DSCC - Defense Supply Center - Columbus

Calmark also provides as a standard offering products that meet many of the specifications defined by Defense Supply Center – Columbus.
Calmark has incorporated the DSCC part numbers as a standard product offering to get the proper specification requirements by the addition of a “CM-”
prefix to the DSCC part configuration for our internal part number system. The DSCC part number will be part of the description.
All part numbers defined in the DSCC specifications are considered COTS items for Calmark.
Design Flexibility – Common Modifications
The Calmark product line offers an extremely broad range of configurations, not all of which are detailed in this catalog. Calmark is set up to handle these
requests. Contact one of our Applications Engineers and a unique part number will be assigned for you for a product that meets your specification. Some of
the modifications available include:
• 7 and 9 or more wedge segments • Different lever lengths than those offered in the catalog
• Lengths outside of our standard catalog product offering • Different hardware than standard offering including screw threads, thread-
• Relocation or addition of mounting holes locking mechanism and bonded washers
• Tapped holes other than the standard catalog product offering • Secured wedges
• Screw head activation different from M2.5 and 3/32 hex socket • Ejection feature simillar to E225 may be implemented on other
• Specific individual wedge dimensions different from the Series profiles
catalog offering • Modification of extractors
• Replacement of split washers with Belleville washers • Hot stamp of plastic parts to your requirements
• Materials with different alloys from the catalog offering • Silkscreen per your requirements
• Different finish from those offered in the catalog • Add chamfers
Our applications engineers can help you specify a cost effective design that will work for your application. The catalog offers the configurations that
meet most applications, but if you don’t see what you’re looking for in the catalog, please call us. Odds are, we’ve already done something very similar.

Warranty
Pentair Technical Products’ Warranty is guaranteed from defects for 1 (one) year after shipment.

www.calmark.com • 800-854-7086 6
 Conduction Cooled Assemblies
Conduction Cooled Assemblies consist of
a conduction cooled frame, backing plate
or backing strips, extractors and wedge
clamps. They are designed for circuit boards
requiring cooling in severe environments
where convection cooling is not practical.
The assembly also provides needed
structural support of the plug-in module
during extremely high shock and vibration
applications. Optional configuration for
compliance to IEEE 1101.2 and VITA 30.1.
Calmark offers a standard design that
takes the guesswork out of the perimeter
of the assembly. The component area can
be customized to match your board and Custom Conduction Cooled Frames
application.
FEATURES
• Conduction frames available in 3U
or 6U, VME or cPCI based designs
• Can accommodate ccPMC or XMCs
• Extractors provide ample force to Wedge Clamp
disengage board connectors Conduction Cooled Frame
• Available in Black Anodize, Chem Free Connector (P)
film or Electroless Nickel plating for
excellent corrosion resistance Coding Keys
• 6061-T651 aluminum provides
high thermal conductivity as well as
lightweight support
• Locking Helicoils secure board Extractor
fasteners in extreme vibration
environments
• High performance five piece wedge
clamp provides high clamping force
with even pressure distribution for
low thermal resistance Plug-in
• Frame and backing plate are each Module
machined from a solid piece to
assure high heat transfer and
structural integrity
• Custom silkscreen available Backing Plate
Wedge Clamp
ACCESSORY
• Code Keys prevent VME64x
Conduction Cooled Assemblies
from inadvertent insertion into the
wrong slot

89090687

3U and 6U designs are avalable with compliance to IEEE 1101.2 and VITA 30.1 specifications.
Conduction Cooled PMC modules can be incorporated per VITA 20.

7 www.calmark.com • 800-854-7086
 Conduction Cooled Assemblies

VARIABLE RIB "XXX"

142.37 [5.605]
139.83 [5.505]
136.14 [5.360]
133.60 [5.260]
115.06 [4.530]

76.96 [3.030]

38.86 [1.530]

4.19 [.165]

3.56 [.140]
0 .000
2.92 [.115]
0 .000
5.38 [.212]
14.61 [.575]
120.0°

44.45 [1.750]

88.90 [3.500]
4.57 [.180]

233.35 [9.187]
BOARD DIMENSION 133.35 [5.250]

2.67 [.105] 177.80 [7.000]

6.48 [.255]
216.87 [8.538]
222.25 [8.750]
225.17 [8.865]
KEEPOUT .236 [6.00] M2.5x0.45
FOR WEDGELOK CCA FRAME
BOARD 89091138
160.00 [6.299]
BOARD DIMENSIONS

Part Number Code Example:

Part Number Code
Conduction Cooled Assemblies CCB3VPMCBP16L
CC B 3 V XXX G B16 L Conduction Cooled Assembly 3U VME designed with ccPMC mounting, black
Version _______________________________ B anodized, with 1.6mm backing plate and latching extractors
3U ______________________________________3
6U ______________________________________6 FINISH TABLE
VME (1101.2) ____________________________________ V Code
cPCI (VITA 30.1) ___________________________________C Letter Finish
Center rib location (mm.m) _______________________________ XXX “G” Gold Chemical Film per Mil-DTL-5541 Class 1A, Type 1
PMC for ccPMC mounting _______________________________ PMC “R” Clear Chemical Film per Mil-DTL-5541 Class 3, Type II
“CC” Clear Chemical Film per Mil-DTL-5541 Class 1A, Type II
Gold Chemical Film Finish _________________________________________G
or choose from Finish Table “B” Black Anodize per Mil-A-8625 Type II, Class 2
“N” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Backing Thermal strip 1.6mm _________________________________________ B16
Backing Thermal strip 2.4mm _________________________________________ B24
Backing Plate 1.6mm ______________________________________________ P16
Backing Plate 2.4mm ______________________________________________ P24
Latching Extractor handle ____________________________________________________ L
no latching ________________________________________________________[blank]

www.calmark.com • 800-854-7086 8
 VITA 1.6 Conduction Cooled Keying
Calmark has the answer for those
IEEE 1101.10 applications with keying
requirements, but do not have front panels.
IEEE 1101.10 specifications provides a
method for keying slots using programming
keys inserted into the front panel assembly
and card guide.
Conduction Cooled Modules used in military
and ruggedized systems do not use this front
panel system. VITA 1.6 standard provides a
method of keying for these types of systems.

Coding Keys
FEATURES
• Complies with ANSI VITA 1.6 Standard
• Gold or Clear Chem Film aluminum
bracket
• 6 configurations per coding bracket set
• 36 configurations in a 6U conduction
cooled application
• Up to 1296 Keying combinations in a 6U
non-conduction cooled application
• Complimentary mounting hardware Plug-In Module
included

CODEKEY BRACKETS Free Connector (P)

Material:
Aluminum Alloy
6061-T6 QQ-A-200/8
Fixed Connector (J)
Finish:
Mil-C Class 1A, Type 1, Gold or
Mil-DTL-5541 Class 3, Type II, Clear
Coding Keys
CODE PINS
Material:
Austenitic Stainless Steel
Finish:
None
WEIGHT Backplane shown - without J0 for clarity
100 pcs. = 0.32 lbs.

9 www.calmark.com • 800-854-7086
 VITA 1.6 Conduction Cooled Keying

CD key pair AD key pair AC key pair ZA key pair ZC key pair ZD key pair
The drawings above are representative of the J32 and P32 configurations. J01 and P01 are mirror images.

Samples of coding key usage

CCKP01-AD CCKP32-ZD CCKP01-ZC CCKP32-CD CCKP01-ZA CCKP32-AC

mates with mates with mates with mates with mates with mates with
CCKJ01-AD CCKJ32-ZD CCKJ01-ZC CCKJ32-CD CCKJ01-ZA CCKJ32-AC

Part Number Code Also available in Kit Form (see

Conduction Cooled Keying contents example below)
CCK x x - x - x - x CCK-KIT -x -x
Board or Backplane Keying Configuration
Free Connector: ____________________________ P
ZA ___________________________________________________ ZA
Fixed Connector: ___________________________ J
ZC ___________________________________________________ ZC
Connector End ZD ___________________________________________________ ZD
01_______________________________________ 01 AC ___________________________________________________ AC
32 _______________________________________ 32 AD ___________________________________________________ AD
Keying Configuration CD ___________________________________________________ CD
ZA ____________________________________________ ZA Thread Type
ZC ____________________________________________ ZC Metric 2.5mm x .45 thread: ____________________________________ [Blank]
ZD ____________________________________________ ZD Imperial 2-56 thread:_____________________________________________-1
AC ____________________________________________ AC Imperial 2-56 locking helicoil: _______________________________________ -2
AD ____________________________________________ AD Metric 2.5mm x .45 locking helicoil:____________________________________ -3
CD ____________________________________________ CD
Example of Kit Contents:
Thread Type
Metric 2.5mm x .45 thread: ______________________________ [blank] CCK-KIT-ZA
Imperial 2-56 thread: ________________________________________1 Qty Item
Imperial 2-56 locking helicoil: ___________________________________2 1 CCKP01-ZA
Metric 2.5mm x .45 locking helicoil: _______________________________ 3 1 CCKJ01-ZA
1 CCKP32-ZA
Finish Type 1 CCKJ32-ZA
Chem Film Gold _________________________________________ [blank]
4 Complimentary Mounting Screws
Chem Film Clear _____________________________________________ CC
4 Washers

www.calmark.com • 800-854-7086 10
 Series 223 & Series 224 Torque-Limiting “Card-Lok”
Calmark offers the Series 223 and 224
Card-Lok retainer for cold plate / heat
exchanger applications. Ideal for field level
maintenance, the Series 223 and 224 Card-
Loks feature an integrated torque limiting
mechanism to simplify installation, optimize
clamping and thermal transfer performance,
and minimize the potential for damage to
the retainer, board and cold wall from over
torqueing.
FEATURES
• Integrated ratchet mechanism (US Patent
7,883,289) simplifies installation Series 223 & Series 224 Torque-Limiting “Card-Lok” Patent no. 7,883,289
• No need for specialized tools or knowledge
of torque spec; ideal for field-level
maintenance
• Simple installation - turn the screw until
it clicks at least three times to achieve
the specified clamp force and optimize
thermal transfer
• Available in two profiles – 5.72 mm x 6.86
mm (.225 in. x .270 in.) and 5.33 mm x Cold Plate
7.24 mm (.210 in. x 2.85 in.)
• Lengths from 97 (3.8 in.) to 325 (12.8 in.)

50
62
06
in 12.7 (0.5 in.) increments

89
• Flexible mounting options
• Available with gold chem film, clear chem
film, black anodized, hard black anodized,
or electroless nickel finish
• Alignment spring feature returns
wedge bodies to relaxed position when Recommended Gap:
unclamping Board Module Assembly
• Clamp force, thermal transfer, life cycle thickness plus
7.62 (.300) for Series 223,
and environmental (MIL 810) test results 8.00 (.315) for Series 224
available
• Each unit tested at factory prior to Lock Nut
shipment to ensure performance;
customer provided with a certificate of
conformance Rear Wedge
• Different clamp force ranges (higher or
lower) are available as custom product
WEDGES Alignment
Material: Spring Intermediate Wedge Bodies
Aluminum alloy 6061-T6 per ASTM-B221 or with alignment springs
* Only one alignment spring
AMS-QQ-A-200/8
for lengths 122 (4.8) or less.
Finish:
See Finish Table Front
Wedge
TORQUE-LIMITING MECHANISM Assembly
Material:
Stainless Steel 17-4 PH
Finish:
Dry Film Lube per Mil-L-46010 Type 1 ALIGNMENT SPRINGS
SCREW Material:
Beryllium Copper QQ-C-533
Material:
Finish:
Stainless steel per ASTM-A582
Nickel QQ-N-290 Class I, GradeG Bright
Finish:
Passivate per AMS2700
WEIGHT
LOCK NUT 1.12g/cm (.1oz/in)
Material: Stainless steel per MS21043-04
Finish: Silver plate per AMS 2410

11 www.calmark.com • 800-854-7086
 Series 223 & Series 224 Torque-Limiting “Card-Lok”

AL

Mounting holes shown in wedge body -

screw and alignment spring hidden for clarity

2.38 (.094) Hex Socket Cap Per ANSI/ Center hole location
ASME B18.3 “E” option only
M/2

W 3.23 (.127) Ref.

MF (Ref) M

AL + 7.62 (.300) max

6.3 (.14) max.

HE

Card-Lok Expanded 89091112

Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Series W H max HE Min. AL range ± 1.3 (.050) M ± .13 (.005) MF ± .76 (.030)

223 5.72 (.225) 6.86 (.270) 8.26 (.325) From 97 (3.8) - 185 (7.3) 22.86 (.90)
AL+12.5 (.500)-M
224 5.33 (.210) 7.24 (.285) 8.64 (.340) From 198 (7.8) - 211 (8.3) 48.26 (1.90) 2
From 224 (8.8) - 325 (12.8) 73.66 (2.90)

Part Number Code Example:

Part Number Code
Series 223 TL Card-Lok Five Piece A224- 4.80T2
Series 224 TL Card-Lok Five Piece Series 224 Card-Lok 121.9 (4.8) long assembly length, black
M A 223 - 4.80 E T2 anodized with two 2-56 threaded mounting holes
Prefix options
Metric Screw Head M2.5 Hex Drive_____________________ M FINISH TABLE
Standard Screw Head 3/32 Hex Drive_______________ [blank] Code
Black Anodize ____________________________________ A Letter Finish
or choose from Finish Table______________________ see table [blank] Chemical Film Finish Gold per Mil-DTL-5541, Type 1
Suffix options Class 1A
“R” Chemical Film Finish Clear per Mil-DTL-5541, Class 3 Type II
Min length. = 97 (3.8), Max length = 325 (12.8),in 13 (0.5) increments_____ length.xx
“A” Black Anodize per Mil-A-8625, Type II, Class 2
Additional Center Mounting Hole_______________________________________ E “HA” Hard Black Anodize per Mil-A-8625, Type III, Class 2
None____________________________________________________ [blank] “EN” Electroless Nickel per Mil-C-26074, Class 4 Grade B, Bright
Mounting options
2-56 tapped mounting hole or choose from Mounting Method Table _____________________ T2 MOUNTING METHOD TABLE
Code
Letter Method
“H” Rivet Mounting Ø1.70 (.067) hole with
3.96 (.156) counterbore x 5.08 (.200) deep and 100º x 3.56
(.140) countersink
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 12
 Series 225 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 225 “Card-Lok”
Retainer for cold plate-heat exchanger
applications. This is an economical wedge
clamp retainer for high efficiency heat
transfer from Board Module Assembly to Cold
Wall.
FEATURES
• Maximum Reliability – Screw-actuated
wedge action locks Board Module
Assembly in place
• Maximum Thermal Transfer – Wedge
action design provides maximum contact
between thermal paths on Board Module
Assembly and the heat sinking surface Series 225 - “Card-Lok” Retainer (cold plate)
• Maximum Resistance to Shock &
Vibration – Wedge action design locks
Board Module Assembly in place to
provide maximum resistance to shock and
vibration
• Zero Insertion & Extraction Forces –
Screw actuation provides zero insertion Cold Plate
and extraction force on Board Module
Assembly

68
62
• Design Flexibility – Special lengths,

06
89
finishes or other design variations
available on request

BODIES & WEDGES

Material:
Aluminum alloy 6061-T6 per ASTM-B221 or Recommended Gap:
AMS-QQ-A-200/8 Board Module
Assembly thickness
Finish: plus 7.62 (.300)
See Finish Table

Board Module Rear Wedge

SCREW Assembly
.093 in or 2.5 mm hex. drive socket head cap
screw
Material:
Stainless steel per ASTM-A582

Finish: Wedge body may be

Passivate per AMS2700 riveted, screwed or
bonded to Board
Module Assembly
WEIGHT
1.34 g/cm (.120 oz/in) Front
Wedge

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)

13 www.calmark.com • 800-854-7086
 Series 225 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX
Detail “V” 4.19
(.165)
12.7
(.50)
8.4
(.33) Detail “W”
Screw Front
Provides visual lock REF Provides added resistance to loosening from shock Wedge
OPTIONAL 226 PART NUMBER SUFFIXES
indication. and vibration. This option adds 2.5 (.10) to the
Detail “L” Unlocked Locked screw length unless combined with the “R” suffix
5.26
Provides prevailing
(.207) torque for resistance to option, then adds 5.1 (.20) total.
Lock Flat
loosening from shock and vibration. Washer Washer
OPTION SUFFIX
10.16
Detail “L” Detail “R” 7.6 Detail “K” (.400)
max.
(.300)
Provides prevailing torque Reduces the possibility of uninten- max. REF Prevents the unintentional REF

ocked for resistance to loosening Lock element per tional disassembly of the screw from rear disassembly of screw from
from shock and vibration. MIL-F-18240 wedge. rear wedge. This option adds
Adds 22 N-cm (2 in-lbs) applied to thread This option adds 2.5 (.10) to the screw 5.1 (.20) to the screw length. locknut
of torque to assembly. See of screw length unless combined with the “W” cut away view of spring
application data onDetail “R” suffix option, then 5.1 (.20) total. rear wedge
previous sheet. Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
Two holes
This option adds 2.5 (.10) to the screw standard. Extra hole added
length
unless combined with the “W” prefix option,
with “E” option. Assembly Length ± 0.76 (.030)
then 5.1 (.20) total. Two holes standard. Extra hole
7.6 added with “E” option
ess (.30)
al. max.
Mounting holes shown in wedge
body – Screw hidden for clarity Units: mm (in)
2.38 (.094) Hex Socket Cap Center hole location Unless otherwise specified:
Per ANSI/ASME B18.3 “E” option only .xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
M/2 Note: Each piece has a tolerance of ± .010
6.86 (.270) max. ± .13
Detail “K” (.005)
Prevents the unintentional disassembly of
screw from rear wedge. This option adds 5.1
(.20) to the screw length. 3.0 (.12) M = Assembly Length
10.1624.13 (.95) ±.76 (.03) minus 48.26 (1.900)
5.72 (.400) ± .13 (.005)
(.225)
max. Assembly Length +5.1 (.200)
or more depending on options
Screw advancement 1.8 (.07) max.
If “V” prefix option, 6.1 (.24) max.
locknut
8.26 (.325) min.
cut away view of rear spring
wedge and captive nut
89066270

Part Number Code Part Number Code Example:

Series 225 Card-Lok Three Piece VA225CR4.80HR
None __________________________________ [blank] Series 225 Card-Lok three piece 121.9 (4.80) long with Visual Indicator,
M W V A 225 - 3.80 E H L R Black Anodized Finish, standard rivet mounting hole and stainless steel
Prefix options captive nut and lock nut option
Metric Screw Head M2.5 Hex Drive __________ M
FINISH TABLE
Standard Screw Head 3/32 __________ [blank] Code
Lock and Flat Washer _____________________ W Letter Finish
None __________________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Visual Indicator ____________________________ V “R” Chemical Film per Mil-DTL-5541 Class 3, Type II, Clear
No Visual Indicator _____________________ [blank]
“A” Black Anodize per Mil-A-8625 Type II, Class 2
Black Anodize ________________________________ A
or choose from Finish Table _________________ see table “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Suffix options “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Stainless Steel Captive (and Lock Nut if “R” option is also selected) ________CR
Standard Plated Steel___________________________________“-”

Assembly length in inches. Standard lengths are 71.12 (2.80), 96.52 (3.80)
and 121.9 (4.80). Other lengths available upon request. ____________ length.xx MOUNTING METHOD TABLE
Code
Additional Center Mounting Hole _____________________________________ E
Letter Method
None _________________________________________________ [blank] [blank] No mounting holes
Mounting Options - holes for rivet mounting _________________________________ H “H” Rivet Mounting Ø1.70 (.067) hole with
or choose from Mounting Option Table _______________________________see table 3.96 (.156) counterbore x 5.08 (.200) deep and 100º x 3.56
Lock Element _______________________________________________________ L
(.140) countersink
None________________________________________________________ [blank]
“T0” 0-80 tapped hole
Lock Nut _____________________________________________________________ R
Captive Screw __________________________________________________________ K “T2” 2-56 tapped hole
None __________________________________________________________ [blank] “TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 14
 Series E225 - “Card-Lok” Retainer (Ejector)
Calmark offers the feature of Ejection of
the PC Card with its Series 225 “Card-Lok”
Retainer. The Series E225 provides initial
ejection of the PC card without damaging
circuits, components or bending connector
pins. Ejector feature E is also available on
other Card-Lock Series on request.
FEATURES
• Safe and Easy Ejection of PC Card–
Screw actuation produces a jacking force
that disengages the PC card from its
mating connector
• Maximum Reliability – Screw-
actuated wedge action locks PC card in Series E225 - “Card-Lok” Retainer (ejector)
place
• Maximum Thermal Transfer – 3URYLGHV SLHFHDVVHPEO\VKRZQ
Wedge-action design provides maximum 0LQ SLHFHDYDLODEOHRQUHTXHVW
contact between thermal path on PC card (MHFWLRQ
and the heat sink surface 3RLQWRIFRQWDFW
• Maximum Resistance to Shock & ZLWKHMHFWLRQVXUIDFH
Vibration – Wedge action design locks
PC card in place to provide maximum
resistance to shock and vibration
• Zero Insertion & Extraction Forces –
Screw actuation provides zero insertion $VVHPEO\
and extraction force on PC card /HQJWK
• Design Flexibility – Special lengths,
finishes or other design variations &
available on request 'LP

MATERIALS & FINISHES &KRLFHRIPRXQWLQJ

KROHVIRUHLWKHUULYHW
BODY & WEDGES RUVFUHZPRXQWLQJ
Aluminum alloy 6061-T6 per ASTM-B221 or 6HH31&RGH
0RXQWLQJ&HQWHUV
AMS-QQ-A-200/8 ,IVFUHZPRXQWLQJ
(TXDOWR$VVHPEO\
LVXVHGSDUWVZLOOEH
Finish: /HQJWKPLQXV$'LP
IXUQLVKHGFRPSOHWHO\
See Finish Table 6HH7DEXODWLRQ
DVVHPEOHG

SCREW %

'LP
Stainless Steel per ASTM-A582 or
Finish:
Passivate per MIL-S-5002 


RETAINER RING
Stainless Steel per ASTM-A582
Finish:
Passivate per MIL-S-5002
APPLICATION DATA
THREADED INSERT
All mounting options except for “H” (rivet
mouting), parts are completely assembled
MS122116, MS21209-CO210 (locking), 50253-1064 for shipping.
For “H” (rivet) Mounting Option, the screw
TOLERANCES assembly and wedge body are shipped
.xxx +/- .010 .xx +/- .02 unassembled.
(.xx +/-0.25 .x +/-0.5) Assemble parts as follows:
1. Rivet Wedge Body to
NOTES Printed Circuit Board.
Clamping characteristics are the same as 2. Insert Screw Assembly
standard Series 225. into Wedge Body.
“E” feature available on other Card-Lok series 3. Collapse Wedge
on request. Body to captivate
screw assembly.

15 www.calmark.com • 800-854-7086
 Series E225 - “Card-Lok” Retainer (Ejector)

OPTION PREFIX 4.19 12.7 8.4

(.165) (.50) (.33)
Detail “V” REF Detail “W” Screw Front
Wedge
Provides visual lock Provides added resistance to loosening from shock
indicator. Unlocked Locked and vibration.
5.26
(.207) Lock Flat
Washer Washer

Part Number Code Example:

Part Number Code
Series E225 Card-Lok Three Piece WVE225-4.80T2
M W V E A 225 - 3.80 H Series E225 Ejecting Card-Lok three piece 121.9 (4.80) long with Lock
Prefix options and Flat Washer, Visual Indicator, Gold Chemical Film Finish, mounting
Metric Screw Head M2.5 Hex Drive ______________________ M holes drilled and tapped for 2-56 screw
Standard Screw Head 3/32 Hex Drive ________________ [blank]
Lock and Flat Washer_________________________________ W FINISH TABLE
Code
None______________________________________ [blank] Letter Finish
Visual Indicator________________________________________V
No Visual Indicator ________________________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize _____________________________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table _______________________________ see table Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Assembly length in inches. Standard lengths are 71.12 (2.80), 96.52 (3.80) and 121.9 (4.80).
“HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request. __________________________________ length.xx “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright

Mounting Options - holes for rivet mounting ________________________________________ H

MOUNTING METHOD TABLE
or choose from Mounting Method Table _____________________________________ see table Code
Letter Method
[blank] No mounting holes
“H” Rivet Mounting Ø1.70 (.067) hole with
3.96 (.156) counterbore x 5.08 (.200) deep and 100º x
3.56 (.140) countersink
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 16
 Series L225 - “Card-Lok” Retainer (Lever-Lok)
Calmark offers Series L225 Lever-Lok
(“Card-Lok”) Retainer which provides tool
free, lever action locking on the Series 225
configuration “Card-Lok.”
FEATURES
• High Reliability – Lever-actuated
wedge action locks Board Module
Assembly in place
• High Thermal Transfer – Wedge action
design provides maximum contact
between thermal path on Board
Module Assembly and heat sink
• High Resistance to Shock & Vibration
– Wedge action design locks Board Series L225 - “Card-Lok” Retainer (lever-lok)
Module Assembly in place to provide
excellent protection against severe
shock and vibration
• Zero Insertion & Extraction Forces
– Lever actuation provides zero
insertion and extraction force on
Board Module Assembly
• Design Flexibility – Special lengths,
finishes or other design variations
available on request
Cold Plate

MATERIALS & FINISHES

70
63
BODY & WEDGES

06
89
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
Black Anodize per MIL-A-8625, Type II, Class 2

SCREW Recommended Gap:

Stainless steel per QQ-S-763 Board Module Assembly
thickness plus 7.62 (.300)
Finish: Board Module Assembly Lock Nut
Passivate per MIL-S-5002 Belleville Washer Stack

Rear Wedge
LEVER ARM Wedge body may be
Aluminum alloy 6061-T6 per ASTM-B221 or screwed or bonded to
AMS-QQ-A-200/8 Board Module Assembly
Finish: Front Wedge

Hard Black Anodize per MIL-A-8625, Type III, Class 2

Lever Arm
FLAT WASHER &
BELLEVILLE WASHERS
Stainless Steel. QQ-S-763.
Flat Washer
Passivate per MIL-S-5002.

WEIGHT
1.65g/cm (.15oz/in)

17 www.calmark.com • 800-854-7086
 Series L225 - “Card-Lok” Retainer (Lever-Lok)

Assembly Length (AL) ± 0.76 (.03)

Two holes standard. Extra hole

added with “E” option.
Center hole location
“E” option only 6.86
Lever width .270 M/2 (.270)
(6.86) Max ± .13 (.005) max.

3.63 (1.43) 5.72 (.225)

24.13 (.950) ± 0.8 (.030) M = AL minus 48.26 (1.90)
± .13 (.005)
.508 (.020)

AL + 22.86 (.900)

89091113
Capable of expansion range of 6.86 (.270) Units: mm (in)
to 8.26 (.325). Requires adjustment to an
exact dimension within this range. See Unless otherwise specified:
Application Data .xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

APPLICATION DATA

CLAMPING FORCE ADJUSTMENT PROCEDURE CLAMPING FORCE DATA

NOTE: Lever-Lok furnished assembled but not Direct force of assembly is approximately 534N (120 lbs), when
adjusted. adjusted per recommended procedure.
1. Fasten Lever-Lok to Board Module Assembly.
Direct force of assembly is affected as follows: 8N (1.8 lbs) per each
2. Insert Board Module Assembly into slot in .025 (.001) variation of cold plate slot width, or 200N (45 lbs) per
cold plate. each full turn of locknut.
3. Actuate lever to locked/closed position.
4. Tighten locknut on end of screw until wedges initially
contact wall of cold plate slot, or slight insertion/extraction drag
is felt.
5. Additionally tighten locknut two (2) full turns.
DO NOT EXCEED TWO (2) TURNS.
6. Lever-Lok is now ready for use.
NOTE: Factory adjustment of clamping force
available on request.

Part Number Code Example:

Part Number Code
Series L225 Card-Lok Three Piece L225-2.80
L225 - 3.80 E T0 Series L225 Ejecting Card-Lok three piece 71.12 (2.80) long with black
Suffix options anodize finish and 2-56 tapped holes
Assembly length in inches. Standard lengths range from MOUNTING METHOD TABLE
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________________ length.xx Code
Other lengths available upon request
Letter Method
Additional Center Mounting Hole ______________________________________________ E
No additional center mounting hole_______________________________________ [blank] [blank] 2-56` tapped hole
Mounting Options - 0-80 tapped holes _____________________________________________ T0 “T0” 0-80 tapped hole
or choose from Mounting Option Table “TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 18
 Series 226 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 226 “Card-Lok”
retainer for cold plate-heat exchanger
applications. A maximum efficiency heat
sinking Board Module Assembly retainer
designed specifically for part length of 4.80
(121.9) inches or longer with five or more
wedge and body segments. The Series
226 design incorporates a Self-Positioning
feature which minimizes wedge and body
misalignment and provides easy insertion.

FEATURES
• Self-positioning design minimizes
wedge and body misalignment Series 226 - “Card-Lok” Retainer (cold plate)
providing easy insertion
• Positive locking provides maximum
reliability
• Maximum thermal transfer
• Maximum resistance to shock and
vibration
• Zero insertion and extraction forces
• Design Flexibility - Special lengths,
finishes or other design variations
available on request

72
63
Cold Plate

06
89
BODIES & WEDGES
Material:
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
See Finish Table

SCREW Recommended Gap:

Board Module Assembly Board Module Assembly
Material: thickness plus 7.62 (.300)
Stainless steel per ASTM-A582 Wedge body may
be screwed, Rear Wedge
riveted or bonded
Finish: to Board Module
Passivate per AMS2700
Alignment Spring
WEIGHT
1.34 g/cm (.120 oz/in)
Intermediate Wedge Bodies
with alignment springs

Front Wedge

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)

Screw

19 www.calmark.com • 800-854-7086
 Series 226 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX (.165)4.19 12.7 8.4
(.33) Detail “W” Screw Front
(.50) Wedge
Detail “V” OPTIONAL 226 PART NUMBER SUFFIXES
REF Provides added resistance to loosening from shock
Provides visual lock
Detail “L” and vibration. This option adds 2.5 (.10) to the
indication. Provides prevailing
Unlocked Locked screw length unless combined with the “R” suffix
5.26 torque for resistance to
loosening from(.207)
shock and vibration. option, then adds 5.1 (.20) total. Lock
Washer
Flat
Washer
OPTION SUFFIX
10.16
Detail “L” Detail “R” 7.6 Detail “K” (.400)
max.
(.300)
Provides prevailing torque Reduces the possibility of uninten- max. REF Prevents the unintentional REF

ocked
for resistance to loosening tional disassembly of the screw from rear disassembly of screw from
Lock element per
from shock and vibration. MIL-F-18240 wedge. rear wedge. This option adds
Adds 22 N-cm (2 in-lbs) applied to thread This option adds 2.5 (.10) to the screw 5.1 (.20) to the screw length. locknut
of torque to assembly. of screw
See application data on length unless combined with the “W” cut away view of spring
Detail “R” rear wedge
previous sheet. suffix option, then 5.1 (.20) total.
Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length
unless combined with the “W” prefix option,
then 5.1 (.20) total. Assembly Length (AL) ± 1.3 (.05)
Two holes standard. Extra hole
7.6 added with “E”. option
ess (.30)
al. max.
Mounting holes shown in wedge body –
Assembly Length Range M ± .13 (.005) Screw and alignment spring hidden for clarity
121.9 (4.80) to 190.4 (7.49) 22.86 (.900) Units: mm (in)
190.5 (7.50) to 215.9 (8.49) 48.26 (1.90) Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
216.0 (8.50) to 329.9 (12.99) 73.66 (2.90)
2.38 (.094) Note: Each piece has a tolerance of ± .010
Center hole location
Hex Socket CapDetail “K” “E” option only
Per ANSI/ASME B18.3 M/2
Prevents the unintentional disassembly of ± .13
screw from rear wedge. This option adds 5.1 (.005)
(.20) to the screw length.
6.86
(270) 10.16
(.400)
5.72 3.0 (.12)
max. - M ± 1.14 (.045)
Assembly Length
(.225) M ± .13 (.005)
2
Screw length equal to assembly length plus .20” min in increments of .10”
(example: an assembly length of 4.85” would use a screw length of 5.10”)
3.6 (.14) max. screw advancement
locknut 7.9 (.31) if visual lock option
cut away view of rear spring
8.26wedge
(.325) min.
and captive nut

89091114

Part Number Code Part Number Code Example:

Series 226 Card-Lok Five Piece MWA226-4.80HK
None _____________________________________ [blank]
Series 226 Card-Lok five piece 121.9 (4.80) long with M2.5 hex drive, lock
M W V A 226 - 4.80 E H L R and flat washer, black anodize finish, holes for rivet mounting and captive
Prefix options screw feature
Metric Screw Head M2.5 Hex Drive______________ M
Standard Screw Head 3/32 Hex Drive________ [blank] FINISH TABLE
Lock and Flat Washer ________________________ W Code
None _____________________________ [blank] Letter Finish
Visual Indicator _______________________________ V [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
No Visual Indicator ________________________ [blank] “R” Chemical Film per Mil-DTL-5541 Class 3, Type II, Clear
Black Anodize __________________________________ A “A” Black Anodize per Mil-A-8625 Type II, Class 2
or choose from Finish Table____________________ see table “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Suffix options “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Stainless Steel Captive (and Lock Nut if “R” option
is also selected) _______________________________________ CR
Standard Plated Steel____________________________________“-”
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx MOUNTING METHOD TABLE
Other lengths available upon request Code
Letter Method
Additional Center Mounting Hole _____________________________________ E [blank] No mounting holes
None _________________________________________________ [blank] “H” Rivet Mounting Ø1.70 (.067) hole with 3.96 (.156)
Mounting Options - holes for rivet mounting _________________________________ H counterbore x 5.08 (.200) deep and 100º x 3.56 (.140) countersink
or choose from Mounting Option Table _______________________________ see table
Lock Element _______________________________________________________ L “T0” 0-80 tapped hole
None_______________________________________________________ [blank] “T2” 2-56 tapped hole
Lock Nut _____________________________________________________________ R “TM2” M2 x 0.40 tapped hole
Captive Screw __________________________________________________________ K “TM2.5” M2.5 x 0.45 tapped hole
None __________________________________________________________ [blank]

www.calmark.com • 800-854-7086 20
 Series 230 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 230 “Card-Lok”
retainer for cold plate-heat exchanger appli-
cations. A mid-width configuration, to meet
Board Module Assembly retainer expansion
requirements between the Series 225 and
240.
FEATURES
• Maximum Reliability – Screw-
actuated wedge action locks Board
Module Assembly in place
• Maximum Thermal Transfer –
Wedge action design provides
maximum contact between
thermal paths on Board Module Series 230 - “Card-Lok” Retainer (cold plate)
Assembly and the heat sinking
surface
• Maximum Resistance to Shock &
Vibration – Wedge action design
locks Board Module Assembly
in place to provide maximum
resistance to shock and vibration
• Zero Insertion & Extraction Forces Cold Plate

13
– Screw actuation provides zero

668
890
insertion and extraction force on
Board Module Assembly
• Design Flexibility – Special lengths,
finishes or other design variations
available on request

Recommended Gap:
BODIES & WEDGES Board Module Assembly
Material: thickness plus 6.35 (.250)
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish: Roll Pin
See Finish Table

SCREW Board Module Assembly

Material:
Stainless steel per ASTM-A582 Shaft may be riveted or
screwed to Board
Finish: Module Assembly
Passivate per AMS2700

WEIGHT
1.34 g/cm (.120 oz/in)

APPLICATION DATA
Wedges
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)

Square Flatwasher
Lockwasher

Screw

21 www.calmark.com • 800-854-7086
 Series 230 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 4.19 8.4
12.7
(.33)
Detail “V” (.165) (.50)
REF
Detail “W” Screw Front
Wedge
Provides visual lock Provides added resistance to loosening from shock and
indication.OPTIONAL 226 PART NUMBERUnlocked
SUFFIXES Locked vibration. This option adds no additional screw length unless
Detail “L”
5.26
(.207)
combined with the “R” suffix option, then adds 2.5 (.10) total.
Lock Flat
Provides prevailing torque for resistance to 5.1 Washer Washer
loosening from shock and vibration. (.20)
OPTION SUFFIX Detail “R” max.
5.1
REF
Detail “L” Reduces the Detail “K” 10.16 Detail “CR” (.20)
max.
(.400)
Provides prevailing possibility of Prevents the uninten- max. If the “R” option REF
REF
torque for resistance unintentional tional disassembly is included with
to loosening from Lock element per disassembly of screw from rear this “CR” option,
shock and vibration. MIL-F-18240 of the screw from rear wedge. This option wedge. This option then the locknut is
applied to thread adds 5.1 (.20) to the stainless steel.
of screw
adds no additional screw length with or locknut

without “CR” unless included with “W” screw length. cut away view of spring
Detail “R” rear wedge
option, then 2.5 (.10) total.
Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length
unless combined with the “W” prefix option,
then 5.1 (.20) total.
Assembly Length (AL) ± 0.76 (.030)
7.6 Two holes standard. Extra hole
(.30) added with “E” option.
max.

Mounting holes shown in wedge body –

Screw hidden for clarity Units: mm (in.)
2.38 (.094) Hex Socket Cap Per ANSI/ Unless otherwise specified:
ASME B18.3 Center hole location .xx ± .25, .x ±.5
5.72 (.220) “E” option only (.xxx ± .010, .xx ± .02)
M/2 Note: Each piece has a tolerance of ± .010
± .13 (.005)
Detail “K”
Prevents the unintentional disassembly of
screw from rear wedge. This option adds 5.1
3.0 (.12)
5.59(.20) to the screw length. 24.13 (.950) ±.76 (.030)
(.220) M = AL minus 48.26 (1.90)
10.16 ± .13 (.005)
(.400)
max. Screw length equal to assembly length plus .20” min in increments of .10”
(example: an assembly length of 4.85” would use a screw length of 5.10”)
1.8 (.07) max. screw advancement
6.1 (.24) if visual lock option

6.99
(.275) locknut
min. of rear
cut away view spring
wedge and captive nut

Part Number Code Part Number Code Example:

Series 230 Card-Lok Three Piece VA230CR4.80HR
None _____________________________________ [blank]
Series 230 Card-Lok three piece 121.9 (4.80) long with visual indicator, black
M W V A 230 - 3.80 E H L R anodize finish, standard rivet mounting holes and stainless steel lock nut
Prefix options option
Metric Screw Head M2.5 Hex Drive_____________ M
Standard Screw Head 3/32 Hex Drive_______ [blank] FINISH TABLE
Code
Lock and Flat Washer ________________________ W Letter Finish
None _____________________________ [blank]
Visual Indicator _______________________________V [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
No Visual Indicator ________________________ [blank] “R” Chemical Film per Mil-DTL-5541 Class 3,
Black Anodize __________________________________ A Type II, Clear
or choose from Finish Table____________________ see table “A” Black Anodize per Mil-A-8625 Type II, Class 2
Suffix options “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Stainless Steel Lock Nut if “R” option is selected ___________________ CR “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Standard Steel Lock Nut_________________________________ “-”
Assembly length in inches. Standard lengths range from MOUNTING METHOD TABLE
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx Code
Other lengths available upon request Letter Method
Additional Center Mounting Hole ______________________________________E [blank] No mounting holes
None _________________________________________________ [blank] “H” Rivet Mounting Ø1.70 (.067) hole with
Mounting Options - holes for rivet mounting __________________________________H 3.96 (.156) counterbore x 4.19 (.165) deep and 100º x 3.56
or choose from Mounting Option __________________________________ see table (.140) countersink
Lock Element _______________________________________________________ L “T0” 0-80 tapped hole
None________________________________________________________ [blank] “T2” 2-56 tapped hole
Lock Nut _____________________________________________________________ R “TM2” M2 x 0.40 tapped hole
Captive Screw __________________________________________________________ K “TM2.5” M2.5 x 0.45 tapped hole
None __________________________________________________________ [blank]

www.calmark.com • 800-854-7086 22
 Series 231 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 231 “Card-Lok”
retainer for cold plate-heat exchanger
applications. A mid-width configuration,
to meet Board Module Assembly retainer
expansion requirements between the Series
225 and 240.

FEATURES
• Maximum Reliability – Screw-actuated
wedge action locks Board Module
Assembly in place
• Maximum Thermal Transfer – Wedge
action design provides maximum
contact between thermal paths on Series 231 - “Card-Lok” Retainer (cold plate)
Board Module Assembly and the heat
sinking surface
• Maximum Resistance to Shock &
Vibration – Wedge action design locks
Board Module Assembly in place to
provide maximum resistance to shock
and vibration
• Zero Insertion & Extraction Forces –
Screw actuation provides zero insertion Cold Plate
and extraction force on Board Module
Assembly
• Design Flexibility – Special lengths,

34
74
finishes or other design variations

06
89
available on request

BODIES & WEDGES

Material:
Aluminum alloy 6061-T6 per ASTM-
B221 or AMS-QQ-A-200/8
Finish:
See Finish Table Recommended Gap:
Board Module
SCREW Board Module Assembly
Assembly thickness plus
Material: Rear Wedge 6.35 (.250)
Stainless steel per ASTM-A582
Wedge body may
be screwed,
Finish: riveted or bonded
Passivate per AMS2700 to Board Module
Assembly Alignment
WEIGHT Spring
1.34 g/cm (.120 oz/in)
Intermediate Wedge
Bodies with alignment
springs

Front
Wedge

Application Data
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option, add 22 N-cm (2 in-lbs)

Screw

23 www.calmark.com • 800-854-7086
 Series 231 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX
Detail “V” 4.19
(.165)
12.7
(.50)
8.4
(.33) Detail “W”
Screw Front
Provides visual lock REF
Provides added resistance to loosening from shock Wedge
OPTIONAL 226 PART NUMBER SUFFIXES
indication. and vibration. This option adds no additional screw
Detail “L”
5.26
Unlocked Locked length unless combined with the “R” suffix option,
Provides prevailing torque
(.207) for resistance to 5.1 then adds 2.5 (.10) total. Lock Flat
loosening from shock and vibration.
OPTION SUFFIX Detail “R”
(.20)
max.
Washer Washer
5.1
Detail “L” Reduces the
REF Detail “K” 10.16 Detail “CR” (.20)
max.
(.400)
Provides prevailing possibility of Prevents the uninten- max. If the “R” option is REF
REF
torque for resistance unintentional tional disassembly included with this
to loosening from Lock element per disassembly of the of screw from rear “CR” option, then
shock and vibration. MIL-F-18240 screw from rear wedge. This option wedge. This option the locknut is
applied to thread adds 5.1 (.20) to the locknut stainless steel.
of screw adds no additional screw length with or
without “CR” unless included with “W” screw length. cut away view of
rear wedge
spring
Detail “R”
option, then 2.5 (.10) total.
Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length
unless combined with the “W” prefix option, Assembly Length ± 1.3 (.050)
then 5.1 (.20) total.
Two holes standard. Extra hole
7.6
added with “E” option
(.30)
max.
2.38 (.094)
Assembly Length Range M ± .13 (.005) Mounting holes shown in wedge body –
Hex Socket Cap
Screw and alignment spring hidden for clarity Units: mm (in)
Per ANSI/ASME B18.3 121.9 (4.80) to 190.4 (7.49) 22.86 (.900)
190.5 (7.50) to 215.9 (8.49) 48.26 (1.90) Center hole location Unless otherwise specified:
216.0 (8.50) to 329.9 (12.99) 73.66 (2.90) “E” option only .xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
5.72 (.220)
Detail “K” M/2 Note: Each piece has a tolerance of ± .010
Prevents the unintentional disassembly of ± .13 (.005)
screw from rear wedge. This option adds 5.1
(.20) to the screw length.
10.16
3.0 (.12)
5.72 (.400)
Assembly
max. Length - M ± 1.14 (.045) M ± .13 (.005)
(.220) 2
Screw length equal to assembly length plus .20” min in increments of .10”
(example: an assembly length of 4.85” would use a screw length of 5.10”)
3.6 (.14) max. screw advancement
locknut 7.9 (.31) if visual lock option
6.99
cut away view of rear spring
wedge(.275)
and captive nut

89091115

Part Number Code Example:

Part Number Code
Series 231 Card-Lok Five Piece W231-4.80LR
M W V A 231 - 4.80 E H L R Series 231 Card-Lok five piece 121.9 (4.80) long with lock and flat washer, gold
Prefix options chemical finish, lock element, no mounting holes and a plated steel lock nut
Metric Screw Head M2.5_________________ M
Standard Screw Head 3/32 ___________ [blank]
Lock and Flat Washer ______________________ W FINISH TABLE
Code
None ___________________________ [blank]
Letter Finish
Visual Indicator ____________________________ V
No Visual Indicator _____________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize ________________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table _________________ see table Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Stainless Steel Lock Nut if “R” option is selected___________________ CR “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Standard Plated Steel___________________________________“-” “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx MOUNTING METHOD TABLE
Other lengths available upon request Code
Letter Method
Additional Center Mounting Hole ______________________________________ E
None _________________________________________________ [blank] [blank] No mounting holes
Mounting Options - holes for rivet mounting _________________________________ H “H” Rivet Mounting Ø1.70 (.067) hole with
or choose from Mounting Option Table _______________________________ see table 3.96 (.156) counterbore x 4.19 (.165) deep and 100º x 3.56
Lock Element _______________________________________________________ L (.140) countersink
None_______________________________________________________ [blank] “T0” 0-80 tapped hole
Lock Nut _____________________________________________________________ R “T2” 2-56 tapped hole
Captive Screw __________________________________________________________ K “TM2” M2 x 0.40 tapped hole
None __________________________________________________________ [blank]
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 24
 Series 235 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the 3 piece Series 235
metric “Card-Lok” retainer for cold plate-
heat exchanger applications. Closed shape
segments provide maximum rigidity
and resistance to distortion under load.
Dual front and rear threads accomplishes
rapid clamp and release action. Enclosed
spring maintains alignment of segments
providing easy insertion.

FEATURES
• Closed shape segments provide
maximum rigidity and resistance to
distortion under load Series 235 - “Card-Lok” Retainer (cold plate)
• Dual threads provide rapid clamp and
release action
• Enclosed springs maintain alignment of
segments providing easy insertion
• Maximum resistance to shock and
vibration
• Zero insertion and extraction forces Cold Plate
• Design Flexibility - Special lengths,
finishes or other design variations

49
available on request

674
890
BODIES & WEDGES
Material:
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish: Recommended Gap:
See Finish Table Board Module Assembly
thickness plus 8.00 (.315)

SCREW
Material:
Stainless steel per ASTM-A582

Finish:
Passivate per MIL-S-5002
Board Rear Wedge
Module
WEIGHT Assembly
1.34 g/cm (.120 oz/in)

Wedge
Wedge body maymay
body be screwed
be or bonded to
screwed
Board or Assembly
Module bonded to Board
Module Assembly

Alignment Spring

Front Wedge

APPLICATION DATA
Screw Recommended Torque 68 N-cm (6 in-lbs)

25 www.calmark.com • 800-854-7086
 Series 235 - “Card-Lok” Retainer (Cold Plate)

2.0 (.079) Hex Socket Cap Assembly Length ± 0.76 (.030)

Per ANSI/ASME B18.3

7.32 (.288)
max.

5.84 22.86 (.900) ± .76 (.030) M/2 ± .13 (.005) See “E” suffix option
(.230)
M = Assembly Length
minus 45.72 (1.80) ± .13 (.005)

8.64 (.340) min.

Two holes standard. Extra hole

added with “E” option.
See “E” suffix option.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 235 Card-Lok Three Piece A235-2.80ETM2.5
S A 235 - 4.80 E TM2.5 P Series 235 Card-Lok three piece, black anodized, 71.12 (2.80) assembly
Prefix options length, with three M2.5 tapped mounting holes.
Slotted Drive ______________________________ S
2mm Hex Drive _______________________ [blank]
FINISH TABLE
Finish options Code
Black Anodize ________________________________ A Letter Finish
or choose from Finish Table [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Assembly length in inches. Standard lengths range from “R” Chemical Film per Mil-DTL-5541 Class 3,
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx Type II, Clear
Other lengths available upon request “A” Black Anodize per Mil-A-8625 Type II, Class 2
Additional Center Mounting Hole _____________________________________ E
“HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
None _________________________________________________ [blank] “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Mounting Options - M2.5 tapped hole____________________________________ TM2.5
or choose from Mounting Option Table __________________________________ see table
Locking Insert Option_________________________________________________________P
None _____________________________________________________________ [blank] MOUNTING METHOD TABLE
Code
Letter Method
[blank] No mounting holes
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 26
 Series 236 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the 5 piece Series 236
metric “Card-Lok” retainer for cold plate-
heat exchanger applications. Closed shape
segments provide maximum rigidity
and resistance to distortion under load.
Dual front and rear threads accomplishes
rapid clamp and release action. Enclosed
springs maintain alignment of segments
providing easy insertion.

FEATURES
• Closed shape segments provide
maximum rigidity and resistance to
distortion under load Series 236 - “Card-Lok” Retainer (cold plate)
• Dual threads provide rapid clamp and
release action
• Enclosed springs maintain alignment of
segments providing easy insertion
• Maximum resistance to shock and
vibration Cold Plate
• Zero insertion and extraction forces

53
674
• Design Flexibility - Special lengths,

890
finishes or other design variations
available on request

BODIES & WEDGES

Material:
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
Recommended Gap:
See Finish Table Board Module Assembly
thickness plus 8.00 (.315)

SCREW Wedge bodybody

Wedge may be screwed
may be or
screwed
bonded or bonded
to Board to Board
Module Assembly
Module Assembly
Material: Rear Wedge
Stainless steel per ASTM-A582

Finish:
Passivate per MIL-S-5002 Board
Module
Assembly
WEIGHT
Intermediate Wedge Bodies
1.34 g/cm (.120 oz/in) with alignment springs

Alignment Springs

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)

Front Wedge

Screw

27 www.calmark.com • 800-854-7086
 Series 236 - “Card-Lok” Retainer (Cold Plate)

Assembly Length ± 1.3 (.050)

2.0 (.079) Hex Socket Cap
Center hole location
Per ANSI/ASME B18.3
M/2 “E” option only
± .13 (.005)

7.32 (.288)
max.

5.84 Assembly Length - M ± .76 (.045) M ± .13 (.005)

(.230) 2

8.64 (.340) min.

Assembly Length Range M

121.9 (4.80) to 197.9 (7.79) 25.40 (1.00)
198.1 (7.80) to 329.9 (12.99) 50.80 (2.00) Two holes standard. Extra hole
added with “E” option.

89091116
Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 236 Card-Lok Five Piece A236-2.80ETM2.5
S A 236 - 5.80 E TM2.5 P Series 236 Card-Lok five piece, black anodized, 71.12 (2.80) asembly
Prefix options length, with three M2.5 tapped mounting holes.
Slotted Drive ______________________________ S
2mm Hex Drive _______________________ [blank]
FINISH TABLE
Finish options
Code
Black Anodize ________________________________ A
or choose from Finish Table Letter Finish
Suffix options [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
“R” Chemical Film per Mil-DTL-5541 Class 3, Type II, Clear
Assembly length in inches. Standard lengths range from “A” Black Anodize per Mil-A-8625 Type II, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Additional Center Mounting Hole ______________________________________ E
None __________________________________________________ [blank]
Mounting Options - M2.5 tapped hole ____________________________________ TM2.5
or choose from Mounting Option Table__________________________________ see table
Locking Insert Option________________________________________________________ P MOUNTING METHOD TABLE
None ____________________________________________________________ [blank] Code
Letter Method
[blank] No mounting holes
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 28
 Series 240 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 240 “Card-Lok”
retainer for cold plate-heat exchanger
applications. A narrow configuration Board
Module Assembly retainer that provides
maximum heat sinking efficiency for high
density card spacing.

FEATURES
• Narrow width allows minimum card
spacing
• Positive locking provides maximum
reliability
• Maximum thermal transfer
• Maximum resistance to shock and Series 240 - “Card-Lok” Retainer (cold plate)
vibration
• Zero insertion and extraction forces
• Design Flexibility - Special lengths,
finishes or other design variations
available on request

BODIES & WEDGES Cold Plate

Material:

99
Aluminum alloy 6061-T6 per ASTM-B221 or

74
06
89
AMS-QQ-A-200/8
Finish:
See Finish Table

SCREW
Material:
Stainless steel per ASTM-A582
Recommended Gap:
Finish: Board Module Assembly
thickness plus 5.33 (.210)
Passivate per MIL-S-5002

WEIGHT Board Module Assembly

.86 g/cm (.077 oz/in)
Rear Wedge

Wedge body may be screwed,

riveted or bonded to Board
Module Assembly

Front Wedge

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)

Screw

29 www.calmark.com • 800-854-7086
 OPTIONAL 226 PART NUMBER PREFIXES
Series 240 - “Card-Lok” Retainer (Cold Plate) OPTIONAL 226 PART NUMBER SUFFIXES

Detail “V” Detail “L”

Provides visual lock indication. Provides prevailing torque for resistance to
OPTION PREFIX 8.4
OPTION SUFFIX
loosening from shock and vibration.
12.7
Detail
(.50) “W”
(.33) Detail “L” Detail “R” 5.1
(.20)
Provides prevailing torque for Reduces the possibility of max.
4.19 Provides added resistance to loosening from shock and REF
(.165) vibration. This option adds 2.54 (.100) to the screw length resistance to loosening from unintentional disassembly of the
when combined
Unlockedwith the “R” option. Locked shock and vibration. Adds Lock element per screw from rear wedge. This option
5.26
(.207)
22 N-cm (2 in-lbs) torque to MIL-F-18240 adds adds 2.54 (.100) to the screw
assembly. See application applied to thread length when combined with the
Screw Front data on previous sheet. of screw
“W” option. Lock Nut material:
Wedge
Detail “R”
stainless steel.
Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length
Lock Flat unless combined with the “W” prefix option,
Detail “W” Washer Washer
then 5.1 (.20) total.
Provides added resistance to loosening from shock and 7.6
vibration. This option adds 2.5 (.10) to the screw length unless (.30)
combined with the “R” suffix option, then adds 5.1 (.20) total. max.
Assembly Length ± 0.76 (.030)
Two holes standard. Extra hole
added with “E” option.
Screw Front
Wedge
2.38 (.094) Hex Socket Cap Per ANSI/ Mounting holes shown in wedge body –
ASME B18.3 Screw hidden for clarity
Detail “K” Center hole location
4.57 (.180) max.
“E” option only
Prevents the unintentional disassembly of
M/2
Lock Flat screw from ±rear wedge. This option adds 5.1
.13 (.005)
Washer Washer (.20) to the screw length.
10.16
(.400)
3.0 (.12) max.
6.10
(.240) 24.13 (.950) ±.76 (.035) M = Assembly Length minus
48.26 (1.90) ± .13 (.005)

Screw length equal toAssembly

assemblyLength
length +5.1 (.200)
plus .20” min in increments of .10”
(example: an assembly length of 4.85” would use a screw locknut
length of 5.10”)
cut away view of rear spring 2.1 (.080) max. screw advancement
wedge and captive nut

5.59 (.220) min.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code A240CR3.80EHLR
Series 240 Card-Lok Three Piece
M W A 240 - 4.80 E H L R Series 240 three piece Card-Lok, black anodized finish, 96.52 (3.80) long,
Prefix options holes for rivet mounting including an extra center mounting hole, with
Metric Screw Head M2.5 Hex Drive _____________ M locking element on the screw thread and a stainless steel locknut
Standard Screw Head 3/32 Hex Drive________ [blank]
Lock and Flat Washer ________________________ W
None _____________________________ [blank] FINISH TABLE
Code
Black Anodize ________________________________ A Letter Finish
or choose from Finish Table _________________ see table
[blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Suffix options “R” Chemical Film per Mil-DTL-5541 Class 3,
Assembly length in inches. Standard lengths range from Type II, Clear
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “A” Black Anodize per Mil-A-8625 Type II, Class 2
Other lengths available upon request “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Additional Center Mounting Hole _______________________________________ E “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
None ___________________________________________________ [blank]
Mounting Options - holes for rivet mounting____________________________________ H MOUNTING METHOD TABLE
or choose from Mounting Option Table _________________________________ see table Code
Lock Element __________________________________________________________ L Letter Method
None _________________________________________________________ [blank] [blank] No mounting holes
Lock Nut ________________________________________________________________R “H” Rivet Mounting Ø1.70 (.067) hole with
None ____________________________________________________________ [blank] 3.96 (.156) counterbore x 5.08 (.200) deep and 100º x 3.56
(.140) countersink
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 30
 Series 245 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 245 “Card-Lok”
retainer for cold plate-heat exchanger
applications. A maximum efficiency heat
sinking Board Module Assembly retainer
offered to retrofit the Series 225 but uses a
6-32 screw to provide greater clamping force
and load capacity.
FEATURES
• Maximum reliability - Screw-actuated
wedge action locks Board Module
Assembly in place
• Maximum thermal transfer - Wedge
action design provides maximum
contact between thermal paths on Series 245 - “Card-Lok” Retainer (cold plate)
Board Module Assembly and the heat
sinking surface
• Maximum resistance to shock and
vibration - Wedge action design locks
Board Module Assembly in place to
provide maximum resistance to shock
and vibration
• Zero insertion and extraction forces -
Screw actuation provides zero insertion Cold Plate
and extraction force on Board Module

28
Assembly

75
06
89
• Design flexibility - Special lengths,
finishes or other design variations
available on request

BODIES & WEDGES Recommended Gap:

Material: Board Module
Aluminum alloy 6061-T6 per ASTM-B221 or Assembly thickness
plus 7.62 (.300)
AMS-QQ-A-200/8
Board Module
Finish: Assembly
See Finish Table
Rear Wedge
SCREW
Material:
Stainless steel per ASTM-A582 Wedge body may be
screwed, riveted or
Finish: bonded to Board Module
Assembly
Passivate per MIL-S-5002

WEIGHT Front
1.77 g/cm (.159 oz/in) Wedge

Application Data
Recommended Torque 113 N-cm (10 in-lbs)
If Locking Element option, add 34 N-cm (3 in-lbs)

Screw

31 www.calmark.com • 800-854-7086
 Series 245 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX
Detail “V” 14.2 9.9 Detail “W” Screw Front
Wedge
(.39)
Provides visual lock (.56)
REF Provides added resistance to loosening from shock and
OPTIONAL
indication. Changes hex 226 PART NUMBER SUFFIXES
5.00
(.197)
vibration. This option adds 2.5 (.10) to the screw length
drive to 2.38 (.094). This “L”
Detail when combined with the “R” suffix option.
Unlocked Locked
option adds 5.08 (.20) to prevailing
Provides 6.58 Lock Flat
(.259) torque for resistance to Washer Washer
screw length loosening from shock and vibration.
OPTION SUFFIX 7.6 10.16
Detail “L” Detail “R” (.30) Detail “K” (.400)
max. max.
Provides prevailing torque Reduces the possibility of unintentional REF Prevents the unintentional disas- REF
for resistance to loosening disassembly of the screw from rear sembly of screw from rear wedge.
Locked Lock element per
from shock and vibration. MIL-F-18240 wedge. This option adds 2.54 (.10) This option adds 5.08 (.200) to the
Adds 34 N-cm (3 in-lbs) applied to thread to the screw length unless when screw length. locknut
torque to assembly. See of screw combined with the “W” suffix option, cut away view of spring
application data onDetail
previous
“R” then it adds 5.08 (.20). rear wedge
sheet. Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length Assembly Length ± 0.76 (.030)
Two holes standard. Extra hole
unless combined with the “W” prefix option, added with “E” option.
then 5.1 (.20) total.
7.6
nless (.30) Mounting holes shown in wedge body –
2.78 (.109) Hex Socket Cap Per ANSI/
otal. ASME B18.3 max. Screw hidden for clarity
Center hole location
6.86 (.270) max. “E” option only
M/2
± .13 (.005)

Detail “K”
6.60 3.3 (.13)
Prevents the unintentional disassembly of
(.260) 24.13 (.950) ±.76 (.030) M = Assembly Length minus
screw from rear wedge. This option adds 5.1
48.26 (1.90) ± .13 (.005)
(.20) to the screw length.
Screw length equal to assembly length plus
10.16 .20” min in increments of .10”
(.400) (example: an assembly length of 4.85” 1.8 (.070) max. screw advancement
max. would use a screw length of 5.10”) if visual lock option 6.1 (.240)

8.26
(.325)
min.
locknut
Units: mm (in.)
cut away view of rear spring Unless otherwise specified:
wedge and captive nut .xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 245 Card-Lok Three Piece 245-3.80H Series 245 three piece Card-Lok, 96.52 (3.80) long, gold chemical
M W V A 245 - 4.80 E H L R film finish with holes for rivet mounting
Prefix options
Metric Screw Head M2.5_________________ M
Standard Screw Head 7/64 ___________ [blank] FINISH TABLE
Lock and Flat Washer _____________________ W Code
None __________________________ [blank] Letter Finish
Visual Indicator (changes hex drive to 3/32)___________ V
No Visual Indicator _____________________ [blank]
[blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize ________________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table _________________ see table Type II, Clear
“A” Black Anodize per Mil-A-8625 Type II, Class 2
Suffix options “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Stainless Steel Lock Nut if “R” option is selected ___________________ CR “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Standard Plated Steel___________________________________ “-”
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx MOUNTING METHOD TABLE
Other lengths available upon request Code
Additional Center Mounting Hole _____________________________________ E Letter Method
None _________________________________________________ [blank] [blank] No mounting holes
Mounting Options - holes for rivet mounting _________________________________ H “H” Rivet Mounting Ø1.70 (.067) hole with
or choose from Mounting Option Table ______________________________ see table 3.96 (.156) counterbore x 5.08 (.200) deep and 100º x 3.56
Lock Element _______________________________________________________ L (.140) countersink
None_______________________________________________________ [blank]
“T0” 0-80 tapped hole
Lock Nut _____________________________________________________________ R
None __________________________________________________________ [blank] “T2” 2-56 tapped hole
Captive Screw __________________________________________________________ K “TM2” M2 x 0.40 tapped hole
None __________________________________________________________ [blank] “TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 32
 Series 250 - “Card-Lock” Retainer (Cold Plate)
Calmark offers the Series 250 “Card-Lok”
Retainer for cold plate-heat exchanger
applications. A maximum efficiency heat
sinking Board Module Assembly retainer
offered to provide greater clamping force and
load capacity for Board Module Assembly of
greater weight and mass.

FEATURES
• Maximum reliability - Screw-actuated
wedge action locks Board Module
Assembly in place
• Maximum thermal transfer - Wedge
action design provides maximum Series 250 - “Card-Lok” Retainer (cold plate)
contact between thermal paths on
Board Module Assembly and the heat
sinking surface
• Maximum resistance to shock and
vibration - Wedge action design locks
Board Module Assembly in place to
provide maximum resistance to shock
and vibration
• Zero insertion and extraction forces -
Screw actuation provides zero insertion
and extraction force on Board Module Cold Plate

Assembly

39
75
• Design flexibility - Special lengths,

06
89
finishes or other design variations
available on request

BODIES & WEDGES

Material:
Aluminum alloy 6061-T6 per ASTM-B221 or Recommended Gap:
Board Module Assembly
AMS-QQ-A-200/8 thickness plus 10.80 (.425)
Finish:
See Finish Table
Board Module Assembly
SCREW
Material: Rear Wedge
Stainless steel per ASTM-A582

Finish: Wedge body may be screwed,

riveted or bonded to Board
Passivate per MIL-S-5002 Module Assembly

WEIGHT
3.63 g/cm (.325 oz/in)
Front Wedge

APPLICATION DATA
Recommended Torque 226 N-cm (20 in-lbs)
If Locking Element option add 45 N-cm (4 in-lbs)

Screw

33 www.calmark.com • 800-854-7086
 Series 250 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX
Detail “V” 12.7 8.4
(.33)
Detail “W”
(.50) Screw Front
Provides visual lock REF Provides added resistance to loosening from shock and Wedge
OPTIONAL
indication. This option 6.99 226 PART NUMBER SUFFIXES
vibration. This option adds 5.08 (.20) to the screw length
(.275)
adds 5.08 (.20) toDetail
the “L” Unlocked Locked when combined with the “R” suffix option.
8.89
screw length. Provides prevailing
(.350) torque for resistance to
Lock Flat
loosening from shock and vibration. Washer Washer
OPTION SUFFIX
Detail “L” Detail “R” 7.6
Detail “K”
10.16
(.400)
(.30) max.
Provides prevailing torque Reduces the possibility of max.
Prevents the unintentional disas- REF
REF
for resistance to loosening Lock element per unintentional disassembly of the sembly of screw from rear wedge.
ocked
from shock and vibration. MIL-F-18240 screw from rear wedge. This option This option adds 5.08 (.200) to
Adds 45 N-cm (4 in-lbs) applied to thread adds no additional screw length un- the screw length. locknut
torque to assembly. See of screw less included with “W” option, then cut away view of spring
application data on previous
Detail “R” 5.08 (20) total. rear wedge
sheet. Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length Assembly Length ± 0.76 (.030)
unless combined with the “W” prefix option, Two holes standard. Extra hole
then 5.1 (.20) total. added with “E” option.
7.6
less (.30)
3.57 (.141) Hex Socket Cap max. Mounting holes shown in wedge body –
tal. Per ANSI/ASME B18.3 Screw hidden for clarity
Center hole location
9.78 (.385) max. “E” option only
M/2
± .13 (.005)

Detail “K”
4.1 (.16)
Prevents the unintentional disassembly of
9.53 24.13 (.950) ±.76 (.035) M = Assembly Length minus
(.375) screw from rear wedge. This option adds 5.1
48.26 (1.90) ± .13 (.005)
(.20) to the screw length.
10.16 Screw length equal to assembly length plus
(.400) .20” min in increments of .10” 2.6 (.100) max. screw advancement
max. (example: an assembly length of 4.85” if visual lock option 6.1 (.240)
would use a screw length of 5.10”)

11.94 (.470) min.

locknut
Units: mm (in.)
cut away view of rear spring Unless otherwise specified:
wedge and captive nut .xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 250 Card-Lok Three Piece V250CR4.80HR
M W V A 250 - 3.80 E H L R Series 250 Card-Lok three piece 121.9 (4.80) long with Visual Indicator, gold
Prefix options chemical film finish, standard rivet mounting hole and stainless steel lock
Metric Screw Head M4 Hex Drive ______________ M nut option
Standard Screw Head 9/64 Hex Drive________ [blank]
Lock and Flat Washer ________________________ W FINISH TABLE
None _____________________________ [blank] Code
Visual Indicator _______________________________ V Letter Finish
No Visual Indicator ________________________ [blank]
[blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize __________________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table____________________ see table
Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Stainless Steel Lock Nut if “R” option is selected ____________________ CR “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Standard Plated Steel Lock Nut ______________________________ “-” “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx
Other lengths available upon request MOUNTING METHOD TABLE
Code
Additional Center Mounting Hole _____________________________________ E Letter Method
None _________________________________________________ [blank]
Mounting Options - holes for rivet mounting _________________________________ H [blank] No mounting holes
or choose from Mounting Option Table ______________________________ see table “H” Rivet Mounting Ø3.45 (.136) hole with
Lock Element _______________________________________________________ L 4.95 (.195) counterbore x 7.62 (.300) deep and 100º x 4.95
None_______________________________________________________ [blank] (.195) countersink
Lock Nut _____________________________________________________________ R “T0” 0-80 tapped hole
None __________________________________________________________ [blank] “T2” 2-56 tapped hole
Captive Screw __________________________________________________________ K
None __________________________________________________________ [blank] “TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 34
 Series 255 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 255 “Card-Lok”
Retainer for cold plate-heat exchanger
applications. A maximum efficiency heat
sinking Board Module Assembly retainer
offered to provide greater clamping force and
load capacity for Board Module Assembly of
greater weight and mass.

FEATURES
• Maximum reliability - Screw-actuated
wedge action locks Board Module
Assembly in place
• Maximum thermal transfer - Wedge
action design provides maximum Series 255 “Card-Lok” Retainer (cold plate)
contact between thermal paths on
Board Module Assembly and the heat
sinking surface
• Maximum resistance to shock and
vibration - Wedge action design locks
Board Module Assembly in place to
provide maximum resistance to shock
and vibration Cold Plate
• Zero insertion and extraction forces -
Screw actuation provides zero insertion

80
75
06
and extraction force on Board Module

89
Assembly
• Design flexibility - Special lengths,
finishes or other design variations
available on request

BODIES & WEDGES Recommended Gap:

Board Module Assembly
Material: thickness plus 13.33 (.525)
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish: Board Module Assembly

See Finish Table

Rear Wedge

SCREW
Material:
Wedge body may be screwed,
Stainless steel per ASTM-A582 riveted or bonded to Board
Finish: Module Assembly

Passivate per MIL-S-5002

WEIGHT Front Wedge

4.74 g/cm (.425 oz/in)

APPLICATION DATA
Recommended Torque 350 N-cm (31 in-lbs)
If Locking Element option add 57 N-cm (5 in-lbs)

Screw

35 www.calmark.com • 800-854-7086
 Series 255 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX
Detail “V” 14.5 10.2
(.40)
Detail “W” Screw Front
Wedge
(.57)
Provides visual lock REF Provides added resistance to loosening from shock and
7.87 226 PART NUMBER SUFFIXES
OPTIONAL
indication. This option (.310) vibration. This option adds 5.08 (.20) to the screw length
adds 5.08 (.20) to the
Detail “L” 10.92 Unlocked Locked when combined with the “R” suffix option.
screw length. (.430)
Provides prevailing torque for resistance to Lock Flat
Washer Washer
loosening from shock and vibration.
OPTION SUFFIX 10.16
Detail “L” Detail “R” 7.6
(.30) Detail “K” (.400)
max.
Provides prevailing torque Reduces the possibility of max.
REF Prevents the unintentional disas- REF
for resistance to loosening unintentional disassembly of the sembly of screw from rear wedge.
Locked Lock element per screw from rear wedge. This option
from shock and vibration. MIL-F-18240
This option adds 5.08 (.200) to
Adds 57 N-cm (5 in-lbs) applied to thread
adds no additional screw length the screw length. locknut
torque to assembly. See of screw unless included with “W” option, cut away view of spring
application data onDetail
previous
“R” then 5.1 (.20) total. rear wedge
sheet. Reduces the possibility of unintentional
disassembly of the screw from rear wedge.
This option adds 2.5 (.10) to the screw length Assembly Length ± 0.76 (.03)
unless combined with the “W” prefix option, Two holes standard. Extra hole
added with “E” option.
then 5.1 (.20) total.
7.6
unless (.30)
3.96 (.156) Hex Socket Cap Per ANSI/ Mounting holes shown in wedge body –
total. ASME B18.3 max. Screw hidden for clarity
Center hole location
“E” option only
11.70 (.460) max.
M/2
± .13 (.005)

Detail “K”
4.8 (.19) Units: mm (in.)
12.70 Prevents the unintentional disassembly of (.035) Unless otherwise specified:
(.500) 24.13 (.950) ±.76 M = Assembly Length minus
screw from rear wedge. This option adds 5.1 .xx ± .25, .x ±.5
48.26 (1.90) ± .13 (.005) (.xxx ± .010, .xx ± .02)
(.20) to the screw length. Note: Each piece has a tolerance of ± .010
10.16 Screw length equal to assembly length plus
.20” min in increments of .10”
(.400) (example: an assembly length of 4.85” 5.1 (.20) max. screw advancement
max. would use a screw length of 5.10”) if visual lock option 9.4 (.37)

15.24 (.600) min.

locknut
cut away view of rear spring
wedge and captive nut

Part Number Code Example:

Part Number Code
Series 255 Card-Lok Three Piece VA255CR4.80HR
Prefix options M W V A 255 - 3.80 E H L R Series 255 Card-Lok three piece 121.9 (4.80) long with Visual Indicator,
black anodized finish, standard rivet mounting hole and stainless steel lock
Metric Screw Head M4 Hex Drive_____________ M
Standard Screw Head 5/32 Hex Drive________ [blank] nut option
Lock and Flat Washer ________________________ W FINISH TABLE
None _____________________________ [blank] Code
Visual Indicator _______________________________ V Letter Finish
No Visual Indicator ________________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize __________________________________ A
“R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table____________________ see table Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Stainless Steel Lock Nut if “CR” option is selected ___________________ CR “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Standard Plated Steel Lock Nut _____________________________ “-”
“EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx
Other lengths available upon request MOUNTING METHOD TABLE
Additional Center Mounting Hole _____________________________________ E Code
None _________________________________________________ [blank] Letter Method
Mounting Options - holes for rivet mounting _________________________________ H [blank] No mounting holes
or choose from Mounting Option Table ______________________________ see table “H” Rivet Mounting Ø3.45 (.136) hole with
Lock Element _______________________________________________________ L 4.95 (.195) counterbore x 9.91 (.390) deep and 100º x 4.95
None_______________________________________________________ [blank] (.195) countersink
Lock Nut _____________________________________________________________ R “T0” 0-80 tapped hole
None __________________________________________________________ [blank] “T2” 2-56 tapped hole
Captive Screw __________________________________________________________ K
None __________________________________________________________ [blank]
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 36
 Series 260 - “Card”Lok” Retainer (Cold Plate)
Calmark offers the advance design Series
260 “Card-Lok” retainer for cold plate/heat
exchanger applications. This totally unique
design incorporates design advancements
that provide increased thermal transfer, easy
insertion and lighter weight. Conforms to
DSSC 89024.

FEATURES
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body alignment
for easy insertion
• Captivated rear wedge Series 260 “Card-Lok” Retainer (cold plate)
• Choice of screw head style
• Dimensionally compatible with Series
225 & 245
• Lighter weight
• Design Flexibility - Special lengths,
finishes or other design options
available on request

91
675
Cold Plate

890
BODIES, WEDGES & SHAFTS
Material:
Aluminum alloy 6061-T6 per ASTM-B221
or AMS-QQ-A-200/8
Finish: Recommended Gap:
See Part Number Code Board Module Assembly
thickness plus 7.62 (.300)

SCREW, LOCK & FLAT WASHER

Screw:
Roll Pin
Stainless steel per ASTM-A582
Passivated per AMS2700
or NAS1352C (depending on option)
Board Module Assembly
Washer: Shaft may be riveted or screwed to Board
Shaft may be riveted, screwed
Stainless steel per ASTM-A240 Module Assembly
or bonded to Board Module
Passivated per AMS2700 Assembly

Lock Washer:
MS35338-135

WEIGHT
.95 g/cm (.085 oz/in)
APPLICATION DATA
Wedges Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)

Square Flatwasher
Lockwasher

Screw

37 www.calmark.com • 800-854-7086
 Series 260 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9 5.8
(.35) (.23)
Detail “V” 4.57
(.180)
Provides visual lock
Unlocked Locked
indication. 5.77
(.227)
OPTION SUFFIX
Detail “L”
Provides prevailing torque
Detail “K”
for resistance to loosening Prevents the unintentional
from shock and vibration. disassembly of screw from front
Lock element per
Adds 22 N-cm (2 in-lbs) MIL-F-18240 wedge.
slotted shaft
torque to assembly. See applied to thread of screw cut away view of front wedge
slotted screw
application data on previous
sheet.

Center hole location

2.38 (.094) Hex Socket Cap Per ANSI/ “E” option only
ASME B18.3
M/2
± .13 (.005)

6.86 (.270) max.

6.35 M = Assembly Length 20.32 (.800)

(.250) 4.6 (.18) REF
minus 48.26 (1.90)
± .13 (.005)
Assembly Length ± 1.3 (.050)

7.6 (.300) max.

8.26 (.325) min.

Two holes standard. Extra hole

added with “E” option.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 260 Card-Lok Five Piece MVA260-3.80ET2LK
M V A 260 - 3.80 E H L K Series 260 Card-Lok five piece 96.52 (3.80) long black anodized with M2.5
Prefix options hex drive, visual indicator, three mounting holes tapped for 2-56 thread,
Metric Screw Head M2.5 Hex Drive _____________ M locking element and captive screw feature
Standard Screw Head 3/32 Hex Drive________ [blank]
Visual Indicator ____________________________ V
No Visual Indicator _____________________ [blank]
FINISH TABLE
Code
Black Anodize ________________________________ A Letter Finish
or choose from Finish Table _________________ see table [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Suffix options “R” Chemical Film per Mil-DTL-5541 Class 3,
Assembly length in inches. Standard lengths range from Type II, Clear
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “A” Black Anodize per Mil-A-8625 Type II, Class 2
Other lengths available upon request
“HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank] “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Mounting Options - through mounting holes_________________________________ H
or choose from Mounting Option Table ______________________________ see table MOUNTING METHOD TABLE
Lock Element _______________________________________________________ L Code
None_______________________________________________________ [blank] Letter Method
Captive Screw __________________________________________________________ K “H” Ø1.73/1.85 (.068/.073) dia. through holes countersink
None __________________________________________________________ [blank] 100° x 1.50 (.060) deep
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 38
 Series L260 - “Card-Lok” Retainer (Lever-Lok)
Calmark offers the Series L260 Lever-Lok
“Card-Lok” retainer for cold plate/heat
exchanger applications. This totally unique
design provides tool free, lever action locking
on the advance design Series 260 Card-Lok.
The Series L260 provides visual indication
of accurate, repeatable locking to a preset
clamping force.

FEATURES
• Tool-free actuation
• Visual indication of locked or unlocked
status
• Preset and adjustable clamping force Series L260 “Card-Lok” Retainer (lever-lok)
• Clamping force consistently repeated
• Maintains wedge and body alignment
for easy installation
• Design Flexibility - Special lengths,
finishes, or other design options
available on request

MATERIALS & FINISHES

Cold Plate
WEDGE, BODY, SHAFT & LEVER
Material:

04
76
06
Aluminum alloy 6061-T6 per ASTM-B221 or

89
AMS-QQ-A-200/8
Finish:
Wedge, Body, Shaft & Lever: Black Anodize per
MIL-A-8625, Type II, Class 2.
Wedges: also have Dry Film Lube per Recommended Gap:
MIL-PRF-46010 Board Module Assembly
Lever: Hard Black Anodize per MIL-A-8625, thickness plus 7.62 (.300)
Type III, Class 2

ADJUSTMENT SCREW Board Module Assembly

Material: Adjustment Screw
Stainless Steel per ASTM-A582\QQ-S-763
Belleville Washer Stack
Finish: Square Flatwasher
Passivate per AMS2700

HARDWARE
Material: Wedges
Front Washer: MPIF Standard 35
Lever Arm
Rear Washer: ASTM-A240 Shaft screwed to
Belleville Washers: ASTM-A666 Board Module Assembly
Finish:
Passivate per Mil-S-5002
Square Flat Washer
WEIGHT
1.17 g/cm (.105 oz/in)

39 www.calmark.com • 800-854-7086
 Series L260 - “Card-Lok” Retainer (Lever-Lok)

Lever width .270 Assembly Length (AL) ± 1.3 (.050) 6.35 (.250)
(6.86) Max

2.67 (.105)
6.86
(.270)
max.
Capable of expansion 2.38 (.094) Hex
range of 6.86 (.270) to Socket Cap Per
8.26 (.325). Adjustment ANSI/ASME B18.3
required to an exact
dimension within this
range.

Assembly Length +26.4 (1.04) REF when fully relaxed and unadjusted.
Dimension will shorten by approximately 5.3 (.21) when adjusted.

33.15 (1.305) M/2 ± .13 (.005)

1.5 (.06) REF
7.04 (.277)

M = Assembly Length
minus 48.26 (1.90) ± .13 (.005)
3.63 (1.43)

Units: mm (in.)
-1 Shown Unless otherwise specified:
-2 Opposite .xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

CLAMPING FORCE ADJUSTMENT CLAMPING FORCE DATA

PROCEDURE Direct force of assembly is approximately
Lever-Lok is furnished unadjusted and will require 556N (125lbs), when adjusted per rec-
the use of the following procedure to achieve ommended procedure.
proper clamping.
Direct force of assembly is affected ap-
NOTE: Factory preset adjustment available on proximately as follows: 26.7N (6lbs) per
request. (See part number code) each .025 (.001) variation of cold plate slot
1. Fasten Lever-Lok to Board Module width, or 169N (38lbs) per each full turn
Assembly of screw.
2. Insert Board Module Assembly into
slot in cold plate
3. Actuate lever to locked/closed position
4. Tighten screw on end of shaft until wedges
initially contact wall of cold plate slot, or
slight insertion extraction drag is felt
5. Additionally tighten screw
2 full turns.
DO NOT EXCEED TWO (2) TURNS
6. Lever-Lok is now ready to use
Note: Factory adjustment of clamping force available on request. See P and P2 suffix option in Part Number Code table.

Part Number Code Example:

Part Number Code
Series L260 Card-Lok Five Piece L260-3.80TM2-1
L260 - 3.80 TM2 -1 P Series L260 five piece lever actuated Card-Lok 96.52 (3.80) long with
black anodized finish, -1 lever direction and no factory preset clamping
Suffix options
load
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80) ___________________ length.xx MOUNTING METHOD TABLE
Other lengths available upon request Code
Mounting Options - M2 x 0.40 tapped holes ______________________________ TM2 Letter Method
or choose from Mounting Option Table _____________________________ see table
Lever Direction _______________________________________________________ -1 [blank] 2-56 tapped hole
_______________________________________________________________ -2 “TM2” M2 x 0.40 tapped hole
Factory Preset clamping force when expanded to 7.63 (.300) “TM2.5” M2.5 x 0.45 tapped hole
556N (125lbs)_____________________________________________________________ P
645N (145lbs) ___________________________________________________________ P2
None _____________________________________________________________ [blank]

www.calmark.com • 800-854-7086 40
 Series LE260 - “Card-Lok” Retainer (Extracting/Lever-Lok)
Calmark offers the Series LE260
Extracting/Lever-Lok (“Card-Lok”) retainer for
cold plate/heat-exchanger applications. This
totally unique design provides the significant
feature of Board Module Assembly extraction
in addition to tool free lever action locking.
The Series LE260 provides visual indication
of accurate, repeatable locking to a preset
clamping force.

FEATURES
• Safe and easy Board Module Assembly
extraction with 4:1 mechanical
advantage Series LE260 “Card-Lok” Retainer (extracting/lever-lok)
• Tool-free actuation
• Visual indication of locked or unlocked
status
• Preset and adjustable clamping force
• Clamping force consistently repeated
• Maintains wedge and body alignment
for easy installation
• Design Flexibility - Special lengths,
finishes, or other design options
available on request

MATERIALS & FINISHES Cold Plate

06
76
06
89
WEDGE, BODY, SHAFT & LEVER
Material:
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
Wedge & Shaft: Black Anodize per MIL-A-8625, Recommended Gap:
Board Module Assembly
Type II, Class 2 thickness plus 7.62 (.300)
Wedges: also have Dry Film Lube per
MIL-PRF-46010
Lever: Hard Black Anodize per MIL-A-8625, Board Module Assembly
Type III, Class 2 Adjustment Screw
Belleville Washer Stack
ADJUSTMENT SCREW
Square Flatwasher
Material:
Stainless steel per ASTM-A582 or AMS-QQ-S-763
Finish: Wedges
Passivate per AMS2700

HARDWARE Lever Arm

Shaft may be screwed to
Material: Board Module Assembly
Front Washer: MPIF Standard 35
Rear Washer: ASTM-A240 Square Flat Washer
Belleville Washers: ASTM-A266
Finish:
Passivate per Mil-S-5002

WEIGHT
1.17 g/cm (.105 oz/in)

41 www.calmark.com • 800-854-7086
 Series LE260 - “Card-Lok” Retainer (Extracting/Lever-Lok)

Lever width .270 Assembly Length ± 1.3 (.050) 6.35 (.250)

(6.86) Max

2.67 (.105) Assembly Length + 16.5 (.65) when fully relaxed and unadjusted.
Dimension will shorten by approximately 5.3 (.21) when adjusted. 6.86
(.270)
2.38 (.094) Hex Socket max.
Cap Per ANSI/ASME B18.3

Capable of expansion
range of 6.86 (.270) to
8.26 (.325). Adjustment
required to an exact
dimension within this
range.

Center hole location

4.95 (.195) Ref. 33.15 (1.305) M/2 ± .13 (.005)

89104360

M = Assembly Length
minus 48.26 (1.90) ± .13 (.005)
36.32 (1.43)
Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
-1 Shown Note: Each piece has a tolerance of ± .010
-2 Opposite

13.39 (.527)

CLAMPING FORCE ADJUSTMENT

PROCEDURE
Lever-Lok furnished assembled with
spring stack preloaded but not adjusted.
1. Fasten Lever-Lok to Board Module
Assembly
2. Insert Board Module Assembly into slot in
cold plate
3. Actuate lever to locked/closed position
CLAMPING FORCE DATA
4. Tighten screw on end of shaft until wedges
initially contact wall of cold plate slot, or Direct force of assembly is approximately 556N
slight insertion extraction drag is felt (125lbs), when adjusted per recommended
procedure.
5. Additionally tighten locknut two full turns.
DO NOT EXCEED TWO (2) TURNS. Direct force of assembly is affected ap-
6. Lever-Lok is now ready to use proximately as follows: 26.7N (6lbs) per
each .025 (.001) variation of cold plate slot
NOTE: Factory adjustment of clamping width, or 169N (38lbs) per each full turn
force available on request. See part of screw.
number code.
Part Number Code Example:
Part Number Code
Series LE260 Card-Lok Five Piece LE260-2.80TM2-1P2
LE260 - 3.80 T0 -1 P Series LE260 five piece lever actuated Card-Lok with extractor feature,
Suffix options 71.12 (2.80) long with M2 x .40 tapped mounting holes, -1 lever direc-
Assembly length in inches. Standard lengths range from tion and factory preset for 645N (145lbs) clamping force when expanded
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx to .300 DIM
Other lengths available upon request
MOUNTING METHOD TABLE
Mounting Options - 0-80 tapped holes ___________________________________ T0 Code
or choose from Mounting Option Table ______________________________ see table
Letter Method
Lever Direction _______________________________________________________ -1
_______________________________________________________________ -2 [blank] 2-56 tapped hole
Factory Preset clamping force when expanded to 7.62 (.300) “T0” 0-80 tapped hole
556N (125lbs)_____________________________________________________________ P “TM2” M2 x 0.40 tapped hole
645N (145lbs) ___________________________________________________________ P2 “TM2.5” M2.5 x 0.45 tapped hole
None _____________________________________________________________ [blank]

www.calmark.com • 800-854-7086 42
 Series 261 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 261 “Card-Lok”
Retainer for cold-plate, heat exchanger
applications.
FEATURES
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body alignment
for easy installation
• Captivated rear wedge
• Choice of screw head style
• Lighter weight
• Design Flexibility - Special lengths,
finishes, or other design options
available on request Series 261 “Card-Lok” Retainer (cold plate)

WEDGES, BODY & SHAFT

Cold Plate

26
Material:

676
890
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
See Finish Table

SCREW, LOCK & FLAT WASHER

Material:
300 Series Stainless Steel
Recommended Gap:
Finish: Board Module Assembly
Passivate per Mil-S-5002 thickness plus 7.62 (.300)

ROLL PIN
Material: Roll Pin
MS39086-125
Finish:
Passivate per Mil-S-5002 Board Module Assembly

Shaft may be riveted or

WEIGHT screwed to Board Module
.95 g/cm (.085 oz/in) Assembly

Wedges

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)
Square Flatwasher
Lockwasher

Screw

43 www.calmark.com • 800-854-7086
 Series 261 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9
(.35) 5.8
(.23)
Detail “V” 4.57
REF
(.180)
Provides visual lock
Unlocked Locked
indication. 5.77
(.227)
OPTION SUFFIX
Detail “L” Detail “K”
Provides prevailing torque
for resistance to loosening Prevents the unintentional disassem-
from shock and vibration. Lock element per
bly of screw from front wedge.
Adds 22 N-cm (2 in-lbs) MIL-F-18240
cut away view of front wedge slotted shaft
applied to thread of screw
torque to assembly. See slotted screw
application data on previous
sheet.

Center hole location

2.38 (.094) Hex Socket Cap Per ANSI/ “E” option only
ASME B18.3
M/2
± .13 (.005)

6.86 (.270) max.

4.6 (.18) REF

M = Assembly Length
6.35 20.32 (.800)
(.250) minus 48.26 (1.90)
± .13 (.005)
Assembly Length ± 0.76 (.030)

7.6 (.30) max.

8.26 (.325) min.

Two holes standard. Extra hole

added with “E” option.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 261 Card-Lok Three Piece MVA261-3.80H
M V A 261 - 3.80 E H L K Series 261 Card-Lok three piece 96.52 (3.80) long with M2.5 socket head screw,
Prefix options visual indicator, black anodize finish and standard rivet mounting hole
Metric Screw Head M2.5 Hex Drive _______________ M
Standard Screw Head 3/32 Hex Drive _________ [blank]
FINISH TABLE
Visual Indicator ______________________________ V Code
No Visual Indicator _______________________ [blank] Letter Finish
Black Anodize __________________________________ A [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
or choose from Finish Table____________________ see table “R” Chemical Film per Mil-DTL-5541 Class 3,
Suffix options Type II, Clear
Assembly length in inches. Standard lengths range from “A” Black Anodize per Mil-A-8625 Type II, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request
“EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Additional Center Mounting Hole _____________________________________ E
None_________________________________________________ [blank]
Mounting Options - Through mounting holes _________________________________ H MOUNTING METHOD TABLE
or choose from Mounting Option Table ______________________________ see table
Code
Lock Element_______________________________________________________ L Letter Method
None ______________________________________________________ [blank] “H” Ø1.73/1.85 (.068/.073) dia. through holes countersink 100°
Captive Screw _________________________________________________________ K x 1.50 (.060) deep
None _________________________________________________________ [blank] “T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 44
 Series 263 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 263 “Card-Lok”
Retainer for cold-plate, heat exchanger
applications. This “Card-Lok” configuration
offers a larger cross sectional profile for
increased clamping force and thermal
transfer.
FEATURES
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body alignment
for easy installation
• Captivated rear wedge
• Choice of screw head style
• Lighter weight Series 263 “Card-Lok” Retainer (cold plate)
• Lower cost - faster delivery
• Design Flexibility - Special lengths,
finishes, or other design options
available on request

33
WEDGES, BODIES & SHAFT

676
Cold Plate

890
Material:
Aluminum alloy 6061-T6 per ASTM-B221 or
AMS-QQ-A-200/8
Finish:
See Finish Table

SCREW
Material:
NAS1352C, Modified NAS1352C04 or
Recommended Gap:
18-8 stainless steel Board Module Assembly
thickness plus 8.25 (.325)
Finish:
Passivate per Mil-S-5002

LOCK WASHER
Material: Board Module Assembly Roll Pin
MS35338-135
Finish:
Passivate per Mil-S-5002
Shaft may be riveted or
screwed to Board
FLAT WASHER Module Assembly
Material:
300 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

ROLL PIN
Material:
Wedges
400 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

WEIGHT
1.07 g/cm (.096 oz/in)
APPLICATION DATA
Square Flatwasher
Recommended Torque 68 N-cm (6 in-lbs)
Lockwasher
If Locking Element option add 22 N-cm (2 in-lbs)
Screw

45 www.calmark.com • 800-854-7086
 Series 263 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9
(.35) 5.8
(.23)
Detail “V” 4.57
REF

Provides visual lock (.180)

Unlocked Locked
indication. 5.77
(.227)

OPTION SUFFIX
Detail “L” Detail “K”
Provides prevailing torque
for resistance to loosening Prevents the unintentional disassem-
from shock and vibration. Lock element per
bly of screw from front wedge.
Adds 22 N-cm (2 in-lbs) MIL-F-18240
slotted shaft
applied to thread of screw cut away view of front wedge
torque to assembly. See slotted screw
application data on previous
sheet.
Center hole location
“E” option only
2.38 (.094) Hex Socket Cap Per
ANSI/ASME B18.3 M/2
± .13 (.005)

7.4 (.293) max.

4.6 (.18) REF

6.35 M = Assembly Length
(.250) 20.32 (.800)
minus 48.26 (1.90) ± .13 (.005)

Assembly Length ± 1.3 (.050)

7.6 (.30) max.

8.26 (.350) min.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010
Two holes standard. Extra hole
added with “E” option.

Part Number Code Example:

Part Number Code V263-3.80ET0K
Series 263 Card-Lok Five Piece
M V A 263 - 3.80 E H L K Series 263 Card-Lok five piece 96.52 (3.80) long with M3 socket head screw,
Prefix options visual indicator, gold chemical finish, 0-80 tapped mounting holes with an
Metric Screw Head M2.5 Hex Drive ______________ M additional center mounting hole and a captive screw option
Standard Screw Head 3/32 Hex Drive ________ [blank]
Visual Indicator ____________________________ V FINISH TABLE
No Visual Indicator _____________________ [blank]
Code
Black Anodize _______________________________ A Letter Finish
or choose from Finish Table _________________ see table
[blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Suffix options
“R” Chemical Film per Mil-DTL-5541 Class 3,
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx Type II, Clear
Other lengths available upon request “A” Black Anodize per Mil-A-8625 Type II, Class 2
Additional Center Mounting Hole _____________________________________ E “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
None _________________________________________________ [blank] “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Mounting Options - through mounting holes_________________________________ H
or choose from Mounting Option Table ______________________________ see table
Lock Element _______________________________________________________ L
MOUNTING METHOD TABLE
None_______________________________________________________ [blank] Code
Captive Screw __________________________________________________________ K Letter Method
None __________________________________________________________ [blank] “H” Ø1.73/1.85 (.068/.073) dia. through holes
countersink 100° x 1.50 (.060) deep
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 46
 Series 264 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the Series 264 “Card-Lok”
Retainer for cold-plate, heat exchanger
applications. This “Card-Lok” configuration
offers a larger cross sectional profile for
increased clamping force and thermal
transfer.
FEATURES
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body alignment
for easy installation
• Captivated rear wedge
• Choice of screw head style
Series 264 “Card-Lok” Retainer (cold plate)
• Lighter weight
• Lower cost - faster delivery
• Design Flexibility - Special lengths,
finishes, or other design options
available on request

WEDGES, BODIES & SHAFT

Material:
Cold Plate

36
Aluminum alloy 6061-T6 per ASTM-B221 or

676
890
AMS-QQ-A-200/8
Finish:
See Part Number Code
SCREW
Material:
NAS1352C, Modified NAS1352C04 or
18-8 stainless steel, Stainless steel per
ASTM-A582
Recommended Gap:
Finish: Board Module Assembly
Passivate per Mil-S-5002 thickness plus 8.25 (.325)

LOCK WASHER
Material:
Roll Pin
MS35338-135
Finish:
Passivate per Mil-S-5002
Board Module Assembly

FLAT WASHER Shaft may be riveted or

screwed to Board
Material: Module Assembly
300 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

ROLL PIN
Material:
400 Series Stainless Steel
Wedges
Finish:
Passivate per Mil-S-5002

WEIGHT
1.07 g/cm (.096 oz/in)

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
Square Flatwasher If Locking Element option add 22 N-cm (2 in-lbs)
Lockwasher

Screw

47 www.calmark.com • 800-854-7086
 Series 264 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9
(.35) 5.8
(.23)
Detail “V” 4.57
REF

Provides visual lock (.180)

Unlocked Locked
indication. 5.77
(.227)

OPTION SUFFIX
Detail “L” Detail “K”
Provides prevailing torque
for resistance to loosening Prevents the unintentional disassem-
from shock and vibration. Lock element per
bly of screw from front wedge.
Adds 22 N-cm (2 in-lbs) MIL-F-18240
slotted shaft
applied to thread of screw cut away view of front wedge
torque to assembly. See slotted screw
application data on previous
sheet.

Center hole location

2.38 (.094) Hex Socket Cap Per “E” option only
ANSI/ASME B18.3
M/2
± .13 (.005)

7.44 (.293) max.

4.6 (.18) REF M = Assembly Length

6.35 minus 48.26 (1.90) 20.32 (.800)
(.250)
± .13 (.005)

Assembly Length +/- 1.76 (.030)

7.6 (.30) max.

8.89 (.350) min.

Two holes standard. Extra hole

added with “E” option.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 264 Card-Lok Three Piece M264-2.80T2LK
M V A 264 - 3.80 E H L K Series 264 Card-Lok three piece 71.12 (2.80) long with .094-in. hex drive,
Prefix options chemical film finish, 2-56 mounting holes, lock element and captive screw.
Metric Screw Head M2.5 Hex Drive _______________ M
Standard Screw Head 3/32 Hex Drive _________ [blank]
FINISH TABLE
Visual Indicator ______________________________ V Code
No Visual Indicator _______________________ [blank] Letter Finish
Black Anodize __________________________________ A [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
or choose from Finish Table____________________ see table
“R” Chemical Film per Mil-DTL-5541 Class 3,
Suffix options Type II, Clear
Assembly length in inches. Standard lengths range from “A” Black Anodize per Mil-A-8625 Type II, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request
“EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank]
Mounting Options - holes for rivet mounting _________________________________ H MOUNTING METHOD TABLE
or choose from Mounting Option Table ______________________________ see table
Code
Lock Element _______________________________________________________ L Letter Method
None _______________________________________________________ [blank] “H” Ø1.73/1.85 (.068/.073) dia. through holes countersink 100°
Captive Screw _________________________________________________________ K x 1.52 (.060) deep
None __________________________________________________________ [blank] “T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 48
 Series 265 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the narrow, advance design
Series 265 “Card-Lok” retainer for cold
plate/heat exchanger applications. This
totally unique design incorporates design
advancements that provide increased
thermal transfer, easy insertion, lighter
weight and now closer center to center board
spacing.

FEATURES
• Narrow design permits closer board
spacing
• Maximum uniform clamping force
• Increased thermal transfer Series 265 “Card-Lok” Retainer (cold plate)
• Maintains wedge and body alignment
for easy installation
• Captivated rear wedge
• Choice of screw head style
• Lighter weight
• Lower cost - faster delivery
• Design Flexibility - Special lengths,
finishes, or other design options

67
Cold Plate
available on request

676
890
WEDGES, BODIES & SHAFT
Material:
Wedges: Aluminum alloy 6061-T6 per
ASTM-B221 or AMS-QQ-A-200/8
Shaft: Aluminum alloy 7075-T6 per
ASTM-B221 or AMS-QQ-A-200/11 Recommended Gap:
Finish: Board Module Assembly
thickness plus 6.35 (.250)
See Finish Table

SCREW, LOCK & FLAT WASHER

Roll Pin
Material:
NAS1352C, Modified NAS1352C04 or Board Module Assembly
18-8 stainless steel, Stainless steel per
ASTM-A582
Finish: Shaft may be riveted or screwed to
Passivate per Mil-S-5002 Board
ShaftModule
may be Assembly
riveted, screwed
or bonded to Board Module
Assembly
ROLL PIN
Material:
400 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

WEIGHT Wedges
.89 g/cm (.080 oz/in)

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)
Square Flatwasher

Lockwasher

Screw

49 www.calmark.com • 800-854-7086
 Series 265 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9
(.35) 5.8
REF (.23)
Detail “V” 4.57
(.180)
Provides visual lock
Unlocked Locked
indication. 5.77
(.227)

OPTION SUFFIX
Detail “L”
Provides prevailing torque Detail “K”
for resistance to loosening Prevents the unintentional disassem-
from shock and vibration. Lock element per
bly of screw from front wedge.
Adds 22 N-cm (2 in-lbs) MIL-F-18240
applied to thread of screw slotted shaft
torque to assembly. See cut away view of front wedge
slotted screw
application data on previous
sheet.

2.38 (.094) Hex Socket Cap Per ANSI/ Center hole location
ASME B18.3
“E” option only
M2
± .13 (.005)

5.84 (.230) max.

5.72 M = Assembly Length minus

4.6 (.18) REF 48.26 (1.90) 20.32 (.800)
(.225)
± .13 (.005)

Assembly Length ± 1.3 (.050)

7.6 (.30) max.

7.37 (.290) min.

Units: mm (in.)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Two holes standard. Extra hole Note: Each piece has a tolerance of ± .010
added with “E” option.

Part Number Code Example:

Part Number Code M265-4.80H
Series 265 Card-Lok Five Piece
M V A 265 - 3.80 E H L K Series 265 Card-Lok five piece 121.9 (4.80) long with M2.5 hex drive, gold chemical
Prefix options film finish and standard rivet hole mounting
Metric Screw Head M2.5 Hex Drive _____________ M
Standard Screw Head 3/32 Hex Drive ________ [blank] FINISH TABLE
Visual Indicator ____________________________ V Code
No Visual Indicator _____________________ [blank] Letter Finish
Black Anodize _______________________________ A [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
or choose from Finish Table _________________ see table “R” Chemical Film per Mil-DTL-5541 Class 3,
Suffix options Type II, Clear
Assembly length in inches. Standard lengths range from “A” Black Anodize per Mil-A-8625 Type II, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). ___________________ length.xx “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank]
Mounting Options - through mounting holes_________________________________ H MOUNTING METHOD TABLE
Code
or choose from Mounting Option Table ______________________________ see table
Letter Method
Lock Element _______________________________________________________ L
None_______________________________________________________ [blank] “H” Ø1.73/1.85 (.068/.073) dia. through holes countersink 100°
Captive Screw __________________________________________________________ K x 1.52 (.060) deep
None __________________________________________________________ [blank] “T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 50
 Series 266 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the narrow, advance design
Series 266 “Card-Lok” retainer for cold
plate/heat exchanger applications. This
totally unique design incorporates design
advancements that provide increased
thermal transfer, easy insertion, lighter
weight and now closer center to center
board spacing.

FEATURES
• Narrow design permits closer board
spacing
• Maximum uniform clamping force
Series 266 “Card-Lok” Retainer (cold plate)
• Increased thermal transfer
• Maintains wedge and body alignment
for easy insertion
• Captivated rear wedge
• Choice of screw head style
• Lighter weight
• Lower cost - Faster delivery Cold Plate

13
668
• Special lengths, finishes, or other

890
design options available on request

WEDGES, BODIES & SHAFT

Material:
Wedges: Aluminum alloy 6061-T6
per ASTM-B221 or AMS-QQ-A-200/8
Aluminum alloy 6061-T6 per Recommended Gap:
Board Module Assembly
ASTM-B221 or AMS-QQ-A-200/8 thickness plus 6.35 (.250)
Shaft: Aluminum alloy 7075-T6 per
ASTM-B221 and AMS-QQ-A-200/11
Finish: Roll Pin
See Finish Table
SCREW, LOCK Board Module Assembly
& FLAT WASHER
Material: Shaft may be riveted or
NAS1352C, Modified NAS1352C04 or screwed to Board
18-8 stainless steel, Stainless steel per Module Assembly
ASTM-A582
Finish:
Passivate per MIL-S-5002

ROLL PIN
Material: Wedges
400 Series Stainless Steel
Finish:
Passivate per Mil-S-5002
APPLICATION DATA
WEIGHT Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)
.89 g/cm (.080 oz/in)
Square Flatwasher
Lockwasher

Screw

51 www.calmark.com • 800-854-7086
 Series 266 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 8.9 (.35)
5.8
REF
Detail “V” 4.57
(.23)

Provides visual lock (.180)

indication. 5.77
Unlocked Locked
(.227)
OPTION SUFFIX
Detail “L”
Provides prevailing torque
Detail “K”
Prevents the unintentional disassembly
for resistance to loosening of screw from front wedge.
from shock and vibration. Lock element per
Adds 22 N-cm (2 in-lbs) MIL-F-18240
applied to thread of screw
torque to assembly. See cut away view of front wedge slotted shaft
application data on previous slotted screw
sheet.

Center hole location

2.38 (.094) Hex Socket Cap Per
ANSI/ASME B18.3 “E” option only
M/2
± .13 (.005)

5.84 (.230)
max.

4.6 (.18) REF

5.72 M = Assembly Length minus
(.225) 20.32 (.800)
48.26 (1.90) ± .13 (.005

Assembly Length ± 0.76 (.030)

7.6 (.30) max.

7.37 (.290) min.

Two holes standard. Extra hole

added with “E” option.

Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .25 (.010)

Part Number Code Example:

Part Number Code 266-2.80T2K Series 266 three piece Card-Lok gold chemical film finish, 71.12
Series 266 Card-Lok Three Piece (2.80) long with 2-56 tapped mounting holes and captive screw feature
M V A 266 - 3.80 E H L K
Prefix options
Metric Screw Head M2.5 Hex Drive _______________ M
Standard Screw Head 3/32 Hex Drive _________ [blank]
FINISH TABLE
Visual Indicator ______________________________ V Code
No Visual Indicator _______________________ [blank] Letter Finish
Black Anodize __________________________________ A [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
or choose from Finish Table___________________ see table “R” Chemical Film per Mil-DTL-5541 Class 3,
Suffix options Type II, Clear
Assembly length in inches. Standard lengths range from “A” Black Anodize per Mil-A-8625 Type II, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). _________________ length.xx “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Other lengths available upon request. “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank]
Mounting Options - holes for rivet mounting _________________________________ H
or choose from Mounting Option Table ______________________________ see table MOUNTING METHOD TABLE
Lock Element _______________________________________________________ L Code
None _______________________________________________________ [blank] Letter Method
Captive Screw _________________________________________________________ K “H” Ø1.73/1.85 (.068/.073) dia. through holes countersink
None __________________________________________________________ [blank] 100° x 1.52 (.060) deep
“T0” 0-80 tapped hole
“T2” 2-56 tapped hole
“TM2” M2 x 0.40 tapped hole
“TM2.5” M2.5 x 0.45 tapped hole

www.calmark.com • 800-854-7086 52
 Series 267 - “Card-Lok” Retainer (Narrow)
Calmark offers the narrow configuration
Series 267 “Card-Lok” Retainer for cold-
plate, heat exchanger applications. This
design features narrowest cross sectional
size in addition to optimum thermal
transfer, easy insertion, lighter weight and
now closer center to center board spacing.
FEATURES
• Narrow design permits closer board
spacing
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body Series 267 - “Card-Lok” Retainer (narrow)
• alignment for easy insertion
• Captivated rear wedge
• Choice of screw head style
• Lighter weight
• Lower cost - Faster delivery
• Special lengths, finishes, or other design
option available on request

75
676
Cold Plate

890
WEDGES, BODIES & SHAFT
Material:
Wedges: Aluminum alloy 6061-T6
per ASTM-B221 or AMS-QQ-A-200/8
Aluminum alloy 6061-T6 per
ASTM-B221 or AMS-QQ-A-200/8
Shaft: Aluminum alloy 7075-T6 per Recommended Gap:
ASTM-B221 and AMS-QQ-A-200/11 Board Module Assembly
Finish: thickness plus 5.59 (.220)

See Finish Table

SCREW, LOCK & FLAT WASHER
Material: Board Module Assembly Roll Pin
300 Series Stainless Steel
Finish:
Passivate per Mil-S-5002 Shaft may be riveted or
screwed to Board
ROLL PIN Module Assembly

Material:
400 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

WEIGHT
Wedges
.75 g/cm (.067 oz/in)

APPLICATION DATA
Recommended Torque 68 N-cm (6 in-lbs)
If Locking Element option add 22 N-cm (2 in-lbs)
Square Flatwasher
Lockwasher

Screw

53 www.calmark.com • 800-854-7086
 Series 267 - “Card-Lok” Retainer (Narrow)
OPTION PREFIX 8.9 5.8
(.35)
Detail “V” REF
(.23)
4.27
Provides visual lock (.168)
indication. 4.88
Unlocked Locked
(.192)
OPTION SUFFIX
Detail “L” Detail “K”
Provides prevailing torque
for resistance to loosening Prevents the unintentional
from shock and vibration. Lock element per disassembly of screw from shaft
Adds 22 N-cm (2 in-lbs) MIL-F-18240
slotted shaft
applied to thread of screw cut away view of front wedge
torque to assembly. See relieved screw
application data on previous
sheet.
2.38 (.094) Hex Socket Cap Center hole location
Per ANSI/ASME B18.3 “E” option lonly
M/2
± .13
(.005)
5.00 (.197)
max.
4.6 (.18) REF
20.32
M = Assembly Length (.800)
6.35 minus 48.26 (1.90)
(.250) ± .13 (.005)
Assembly Length ± 1.3 (.050)

7.6 (.30) max.

5.99 (.236) min.

Two holes standard.

Extra hole added with “E” option.

89067677
Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 267 Card-Lok Five Piece 267-2.80T2K Series 267 five piece Card-Lok gold chemical film finish, 71.12
M V A 267 - 3.80 E H L K (2.80) long with 2-56 tapped mounting holes and captive screw feature
Prefix options
FINISH TABLE
Metric Screw Head M2.5 Hex Drive ______________ M
Standard Screw Head 3/32 Hex Drive ________ [blank]
Code
Letter Finish
Visual Indicator ____________________________ V
No Visual Indicator _____________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize ________________________________ A
“R” Chemical Film per Mil-DTL-5541 Class 3, Type II, Clear
or choose from Finish Table _________________ see table “A” Black Anodize per Mil-A-8625 Type II, Class 2
“HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Suffix options “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Assembly length in inches. Standard lengths range from
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80). _________________ length.xx MOUNTING METHOD TABLE
Other lengths available upon request. Code
Additional Center Mounting Hole _____________________________________ E Letter Method
None _________________________________________________ [blank]
“H” Ø1.73/1.85 (.068/.073) dia. through holes
Mounting Options - holes for rivet mounting ____________________________ H countersink 100° x 1.52 (.060) deep
or choose from Mounting Option Table ______________________________ see table
Lock Element _______________________________________________________ L “T0” 0-80 tapped hole
“T2” 2-56 tapped hole
None _______________________________________________________ [blank] “TM2” M2 x 0.40 tapped hole
Captive Screw __________________________________________________________ K “TM2.5” M2.5 x 0.45 tapped hole
None __________________________________________________________ [blank]

www.calmark.com • 800-854-7086 54
 Series 280 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the advance design
Series 280 “Card-Lok” Retainer for cold
plate-heat exchanger applications. This
totally unique design incorporates design
advancements that provide increased
thermal transfer, easy insertion, lighter
weight and lower cost. The Series 280
specifically provides greater clamping
force and load capacity for Board Module
Assembly of higher weight and mass.
FEATURES
• Greater clamping force and load capacity
for Board Module Assembly with higher
weight and mass Series 280 - “Card-Lok” Retainer (Cold Plate)
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body alignment
for easy insertion
• Captive rear wedge
• Choice of screw head style

80
Cold Plate

676
• Dimensionally compatible with

890
Series 250
• Lighter weight
• Lower cost
• Special lengths, finishes, or other design
options available on request

WEDGES, BODIES & SHAFT

Material: Recommended Gap:
Board Module Assembly
Wedges: Aluminum alloy 6061-T6 thickness plus 10.8 (.425))
per ASTM-B221 or AMS-QQ-A-200/8
Aluminum alloy 6061-T6 per
ASTM-B221 or AMS-QQ-A-200/8 Roll Pin

Shaft: Aluminum alloy 7075-T6 per Board Module Assembly

ASTM-B221 and AMS-QQ-A-200/11
Finish:
See Finish Table
Shaft may be riveted, screwed
SCREW, LOCK & or bonded to Board Module
Assembly
FLAT WASHER
Material:
300 Series Stainless Steel
Finish:
Passivate per Mil-S-5002
ROLL PIN Wedges

Material:
400 Series Stainless Steel
Finish:
Passivate per Mil-S-5002

WEIGHT APPLICATION DATA

2.18 g/cm (.195 oz/in) Recommended Torque 227 N-cm (20 in-lbs)
Square Flatwasher
If Locking Element option add 50 N-cm (4 in-lbs)
Lockwasher

Screw

55 www.calmark.com • 800-854-7086
 Series 280 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 12.4
8.38
(.49)
Detail “V” REF (.330)
6.86
Provides visual lock (.270)
indication. 8.89
Unlocked Locked
(.350)
OPTION SUFFIX
Detail “L”
Provides prevailing torque
Detail “K”
for resistance to loosening Prevents the unintentional
from shock and vibration. Lock element per disassembly of screw from shaft
Adds 50 N-cm (4 in-lbs) MIL-F-18240
applied to thread of screw
torque to assembly. See cut away view of front wedge slotted shaft
slotted screw
application data on previous
sheet.

3.57 (.140) Hex Socket Cap Center hole location

Per ANSI/ASME B18.3 “E” option lonly
M/2
± .13
(.005)
9.65 (.380)
max.
6.1 (.24) REF
19.05
M = Assembly Length (.750)
9.27 minus 54.61 (2.45)
(.365) ± .13 (.005)
Assembly Length ± 1.3 (.050)
11.2 (.44) max.

11.68 (.460) min.

Two holes standard.

Extra hole added with “E” option.

89067682
Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code
Series 280 Card-Lok Five Piece A280-4.80HK
M V A 280 - 3.80 E H L K Series 280 Card-Lok five piece 121.9 (4.80) long with black anodize finish,
Prefix options standard rivet mounting hole and captive screw option
Metric Screw Head M3 Hex Drive ______________ M FINISH TABLE
Standard Screw Head 9/64 Hex Drive _______ [blank] Code
Visual Indicator ____________________________ V Letter Finish
No Visual Indicator _____________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize _______________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table _________________ see table Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Assembly length in inches. Standard lengths range from “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80) _________________ length.xx “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Other lengths available upon request.
MOUNTING METHOD TABLE
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank] Code
Mounting Options - holes for rivet mounting _________________________________ H Letter Method
or choose from Mounting Option Table ______________________________ see table “H” Ø3.40/3.53 (.0134/.139) dia. through holes
Lock Element _______________________________________________________ L countersink 60° x 3.81 (.150) deep
None_______________________________________________________ [blank] “T4” 4-40 tapped hole
Captive Screw __________________________________________________________ K “TM3” M3 x 0.50 tapped hole
None __________________________________________________________ [blank]

www.calmark.com • 800-854-7086 56
 Series 281 - “Card-Lok” Retainer (Cold Plate)
Calmark offers the advance design
Series 281 “Card-Lok” Retainer for cold
plate-heat exchanger applications. This
totally unique design incorporates design
advancements that provide increased
thermal transfer, easy insertion, lighter
weight and lower cost. The Series 281
specifically provides greater clamping
force and load capacity for Board Module
Assembly of higher weight and mass.

FEATURES
• Greater clamping force and load
Series 281 - “Card-Lok” Retainer (Cold Plate)
capacity for Board Module Assembly
with higher weight and mass
• Maximum uniform clamping force
• Increased thermal transfer
• Maintains wedge and body
• alignment for easy insertion
• Captive rear wedge Cold Plate

93
676
• Choice of screw head style

890
• Dimensionally compatible with
• Series 250
• Lighter weight
• Lower cost
• Special lengths, finishes, or other
design options available on request
Recommended Gap:
Board Module Assembly
WEDGES, BODIES & SHAFT thickness plus 10.8 (.425)

Material:
Wedges: Aluminum alloy 6061-T6 Roll Pin
per ASTM-B221 or AMS-QQ-A-200/8
Aluminum alloy 6061-T6 per
ASTM-B221 or AMS-QQ-A-200/8
Board Module Assembly
Shaft: Aluminum alloy 7075-T6 per
ASTM-B221 and AMS-QQ-A-200/11 Shaft may be riveted or
Finish: screwed to Board
Module Assembly
See Finish Table
SCREW, LOCK & FLAT
WASHER
Material:
300 Series Stainless Steel
Finish: Wedges
Passivate per Mil-S-5002
ROLL PIN
Material:
APPLICATION DATA
400 Series Stainless Steel Recommended Torque 227 N-cm (20 in-lbs)
Finish: If Locking Element option add 50 N-cm (4 in-lbs)
Passivate per Mil-S-5002 Square Flatwasher
Lockwasher
WEIGHT Screw

2.18 g/cm (.195 oz/in)

57 www.calmark.com • 800-854-7086
 Series 281 - “Card-Lok” Retainer (Cold Plate)
OPTION PREFIX 12.4 8.38
(.49) (.330)
Detail “V” 6.86
REF
(.270)
Provides visual lock
Unlocked Locked
indication. 8.89
(.350)

OPTION SUFFIX
Detail “L” Detail “K”
Provides prevailing torque
for resistance to loosening Prevents the unintentional
from shock and vibration. Lock element per disassembly of screw from shaft.
Adds 50 N-cm (4 in-lbs) MIL-F-18240
slotted shaft
cut away view of front wedge
torque to assembly. See applied to thread of screw
relieved screw
application data on previous
sheet.

3.57 (.140) Hex Socket Cap Center hole location

Per ANSI/ASME B18.3 “E” option lonly
M/2
± .13
(.005)
9.65 (.380)
max.
6.1 (.24) REF
M = Assembly Length 19.05
9.27 minus 54.61 (2.150) (.750)
(.365) ± .13 (.005)
Assembly Length
± 0.76 (.030)
11.2 (.44) max.

11.68 (.460) min.

Two holes standard.

Extra hole added with “E” option.

89067695
Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010

Part Number Code Example:

Part Number Code 281-2.80H
Series 281 Card-Lok Three Piece
M V A 281 - 3.80 E H L K Series 281 Card-Lok three piece 71.12 (2.80) long with chemical film
Prefix options finish and standard rivet mounting hole
Metric Screw Head M3 Hex Drive ________________ M FINISH TABLE
Standard Screw Head 9/64 Hex Drive _________ [blank] Code
Visual Indicator ______________________________ V Letter Finish
No Visual Indicator _______________________ [blank] [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Black Anodize __________________________________ A “R” Chemical Film per Mil-DTL-5541 Class 3,
or choose from Finish Table ___________________ see table Type II, Clear
Suffix options “A” Black Anodize per Mil-A-8625 Type II, Class 2
Assembly length in inches. Standard lengths range from “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
71.12 (2.80), 96.52 (3.80) and 121.9 (4.80) _________________ length.xx “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright
Other lengths available upon request.
MOUNTING METHOD TABLE
Additional Center Mounting Hole _____________________________________ E
None _________________________________________________ [blank]
Code
Letter Method
Mounting Options - holes for rivet mounting _________________________________ H
or choose from Mounting Option Table ______________________________ see table “H” Ø3.40/3.53 (.0134/.139) dia. through holes
Lock Element _______________________________________________________ L countersink 60° x 3.81 (.150) deep
None _______________________________________________________ [blank] “T4” 4-40 tapped hole
Captive Screw _________________________________________________________ K “TM3” M3 x 0.50 tapped hole
None _________________________________________________________ [blank]

www.calmark.com • 800-854-7086 58
 Series 227 & 228 - “Channel-Lok” Retainer (Cold Plate)
Calmark offers the Series 227 and 228
Channel Mounted “Card-Lok”. This design
consists of three or five segment Card-Lok
retainer mounted in its own individual
chassis mountable heatsink channel.
FEATURES
• Self contained Card-Lok/Heatsink
Channel – Three or five segment Card-Lok
mounted in an individually mountable
heatsink channel
• Maximum Reliability – Screw-actuated Series 227 - “Channel-Lok” Retainer (cold plate)
wedge action locks Plug-in Unit in place
• Maximum Thermal Transfer – Wedge
action design provides maximum contact
between thermal paths on Plug-in Unit
and the heat sinking surface
• Maximum Resistance to Shock & Vibration
– Wedge action design locks Plug-in Unit
in place to provide maximum resistance
to shock and vibration
• Zero Insertion & Extraction Forces –
Screw actuation provides zero insertion
and extraction force on Plug-in Unit Series 228 - “Channel-Lok” Retainer (cold plate)
• Design Flexibility – Special lengths,
finishes or other design variations
available on request

MATERIALS
CHANNEL, BODIES &
WEDGES
Material: Series 228 with
Plug-in Unit
Aluminum alloy 6061-T6 locked in place
Series 227
per ASTM-B221 or ready to accept
AMS-QQ-A-200/8 a Plug-in Unit

Finish: Spring
See Finish Table Channel

SCREW
Material:
Stainless Steel per ASTM-
A582 29

Finish:
64
06
89

Passivated per
Mil-S-5002
FLAT WASHERS, Alignment
RETAINING RING Spring

& SPRING Cold Plate

Passivated Stainless Steel
Plug-in Unit
WEIGHT
2.44g/cm (0.22 oz/in) Retaining Ring
Wedge Bodies

Screw APPLICATION DATA

Recommended Torque 68 N-cm (6 in-lbs)

59 www.calmark.com • 800-854-7086
 Series 227 & 228 - “Channel-Lok” Retainer (Cold Plate)

Secures boards Assembly Length ± .050

ranging from 3.00 ± .10
(.118 ± .004) Retaining Ring
1.14 (.045) to
2.62 (.103)

Flatwashers Front Wedge Single center wedge body used for Series 227. Rear Spring
1.55 ± .12 2.38 (.094) Hex Socket Cap Series 228 uses three center body sections Wedge (Allows captive
(.061 ± .005) Per ANSI/ASME B18.3 screw to automatically
engage and disengage
3.05 ± .076 3.8 (.15) rear wedge)
(.120 ± .003)
8.89 (.350)
max.

12.57+0/-.18 M ± .13 (.005) = Length minus 25.4 (1.00)

(.495 +0/-.007) 4.32 ± .12
M/2 ± .13 (.005) (.170 ± .005)
Series 227 &
Series 228
165.1 (6.5)
and shorter

12.70 4.32 ± .12

(.500) (.170 ± .005)

Series 228
177.8 (7.0)
and longer

MF ± .13 (.005) 89066430

MC ± .13 (.005)
Units: mm (in)
Unless otherwise specified:
Right Hand Assembly - shown
Left Hand Assembly - opposite .xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02)
Note: Each piece has a tolerance of ± .010
Series 227
Length 76.2 (3.00) 88.9 (3.50) 101.6 (4.00) 114.3 (4.50) 127.0 (5.00) 139.7 (5.50) 152.4 (6.00) 165.1 (6.50)

MF 25.4 0 (1.000) 31.75 (1.250) 38.10 (1.500) 127.00 (1.750) 50.80 (2.000) 57.15 (2.250) 63.50 (2.500) 69.85 (2.750)

MC 50.80 (2.000) 63.50 (2.500) 76.20 (3.000) 88.90 (3.500) 101.60 (4.000) 114.30 (4.500) 127.00 (5.000) 139.70 (5.500)

Series 228
Length 114.3 (4.50) 127.0 (5.00) 139.7 (5.50) 152.4 (6.00) 165.1 (6.50) 177.8 (7.00) 190.5 (7.50) 203.2 (8.00) 215.9 (8.50) 228.6 (9.00) 241.3 (9.50) 254.0 (10.00)

MF 44.45 (1.750) 50.80 (2.000) 57.15 (2.250) 63.50 (2.500) 69.85 (2.750) 50.80 (2.000) 57.15 (2.250) 57.15 (2.250) 63.50 (2.500) 63.50 (2.500) 69.85 (2.750) 76.20 (3.000)

MC N/A N/A N/A N/A N/A 101.60 (4.000) 107.95 (4.250) 120.65 (4.750) 127.00 (5.000) 139.70 (5.500) 146.05 (5.750) 152.40 (6.000)

Length 266.7 (10.50) 279.4 (11.00) 304.8 (11.50) 317.5 (12.00) 330.2 (12.50) 342.9 (13.00) 355.6 (13.50) 368.3 (14.00) 368.3 (14.50) 381.0 (15.00) 393.7 (15.50) 400.4 (16.00)

MF 82.55 (3.250) 88.90 (3.500) 95.25 (3.750) 101.60 (4.000) 107.95 (4.250) 114.30 (4.500) 120.65 (4.750) 127.00 (5.000) 133.35 (5.250) 139.70 (5.500) 146.05 (5.750) 152.40 (6.000)

MC 158.75 (6.250) 165.10 (6.500) 171.45 (6.750) 177.80 (7.000) 184.15 (7.250) 190.50 (7.500) 196.85 (7.750) 203.20 (8.000) 209.55 (8.250) 215.90 (8.500) 222.25 (8.750) 228.60 (9.000)

Part Number Code Example:

Part Number Code
Series 227 Card-Lok Three Piece 227R-6.50T4
Series 228 Card-Lok Five Piece Series 227 Channel-Lok three piece 165.1 (6.50) long with chemical film finish
M A 228 R - 5.00 T4 and 4-40 tapped mounting holes; this assembly is for the right side
Prefix options A228L-9.50TM3
Metric Screw Head M2.5 Hex Drive _________________ M Series 228 Channel-Lok five piece 241.3 (9.50) long with black anodize finish
Standard Screw Head 3/32 Hex Drive ___ [blank]
and M3 tapped holes; this assembly is for the left side
Black Anodize __________________________________ A
or choose from Finish Table ___________________ see table FINISH TABLE
Code
Suffix options Letter Finish
Right or _______________________________________________ R
Left _________________________________________________ L [blank] Chemical Film per Mil-DTL-5541 Class 1A, Type 1, Gold
Series 227 “R” Chemical Film per Mil-DTL-5541 Class 3,
Standard lengths from 76.2 (3.00) to 165.1 (6.50) Type II, Clear
in 12.7 (.500) increments “A” Black Anodize per Mil-A-8625 Type II, Class 2
Series 228 “HA” Hard Black Anodize per Mil-A-8625 Type III, Class 2
Standard lengths from 101.5 (4.00) to 406.4 (16.00)
in 12.7 (.500) increments ______________________________________ length.xx “EN” Electroless Nickel per Mil-C-26074 Class 4, Grade B, Bright

Mounting Options
4-40 tapped mounting holes ______________________________________________ T4
M3 tapped mounting holes _____________________________________________ TM3

www.calmark.com • 800-854-7086 60
 Series 125/126 and 165/166 Retainers
Calmark offers the Series 125/126 Card
Retainer as the economical approach
to protecting your Printed Circuit Board
in shock and vibration applications. For
those applications that require shock and
vibration protection and heat sinking and
grounding, the Series 165/166 may be the
answer to your problem. The Series 125/126
is made from rugged stainless steel while
the Series 165/166 is made from Alloy 10
BeCu for exceptional thermal and electrical
conductivity. These Retainers conform to
DSCC 85034.
125/126 Material:
.41 (.016) thick Stainless Steel Type
301, Cond. 1/2 H, ASTM -A240
Finish: Series 125/126/165/166 retainers
Passivate per MIL -S-5002 Mounting holes are offset
from card path and occur Part Number Code
SPRING RATE every inch, offering a choice Series
of mounting patterns 125, 126, 165, 166
60.4N/cm (34.5lbs/in) of 125 -06 -3.25 N
deflection per spring finger PCB Thickness
WEIGHT 1.6 (.063) ____________________ 06
.4g/cm (.036oz/inch) 2.4 (.094) ____________________ 09
Length
Coined edges allow
31.75 (1.25) to 311.15 (12.25) _______ length.xx
smooth insertion and
extraction without
in 25.4 (1.00) increments
damage to card Other lengths available on request
Finish (165/166 only)
165/166 Material: Nickel plate _____________________________ N
or choose from Finish Table
.41 (.016) thick Alloy 10 Independent sections
maximize contact with
Beryllium Copper. printed circuit card Part Number Code Example:
Cond. “AT” per Mil-C-81021 125-06-4.25
Finish: Series 125 passivated stainless steel, 107.95
See Part No. Code (4.25) long designed for 1.6 (.063) thick
printed circuit boards
SPRING RATE FINISH TABLE
56.0 N/cm (32 lbs/in) of Code
deflection per spring finger Spring fingers hold card
against rigid side Letter Finish
WEIGHT providing dampening [blank] 125/126: passivated
under shock and vibration
165/166: no finish
.48g/cm (.043oz/in)
Turned in tabs and rigid
wall limit card excursion For 165/166 only
Break sharp edges. under dynamic loading 85
“T” Bright Tin plate per Mil-T-10727
890664
.005 (.0002) min.
“N” Nickel plate per QQ-N-290 Cl. 1, Gr. F
“ZN” Zinc plate per ASTM-B633 Type III (clear), SC1
Printed Circuit Board Dash PCB B Dimension G Dimension “EN” Electroless nickel plate per Mil-C-26074 Cl. 1 Gr. B
No. Thickness +0.38 (.015) +0.0 (.00)
4.32 ± .13 \-0.0 (.000) \-0.80 (.03)
(.170 ± .005)
Recommended -06 1.6 (1/16) 1.91 (.075) 1.14 (.045)
Mounting Dim
-09 2.4 (3/32) 2.67 (.105) 1.91 (.075)
Series 125/126 = 3.18 (.125)
Series 165/166 = 4.19 (.165)
Length
.8 G B .64 (.025) R
(.03) 18.3 (.72) 7.1 (.28) Typ. (see table) (see table)
Typ. (inside) Typ.
Typ.
6.73 8.18 +.25/-.50
(.265) (.322 +.010/-.020)
4.32 ± .13
4.19 (.165) 25.40 ± .13 (.170 ± .005)
2.44 ± .05 (.096 ± .002) Dia.Typ. Typ. (1.000 ± .005)
Units: mm (in) 19.05 (.750) Typ. Tol. Noncum.
3.18 Series 125/126 = 2.54 (.100)
Unless otherwise specified: 125/165 Shown Series 165/166 = 3.56 (.140)
126/166 Opposite (.125)
.xx ± .25, .x ±.5 (.xxx ± .010, .xx ± .02) Typ.
89066486

61 www.calmark.com • 800-854-7086
 Series NW125/NW126 and NW165/NW166 - Retainers
Calmark offers the Series NW125/NW126
and NW165/NW166 Card Retainers for
cold plate heat exchanger applications.
These Retainers provide the necessary
spring pressure to insure positive contact
between the thermal path on the
Printed Circuit Board and the cold plate
surface. The NW165/NW166 provides the
additional benefit of improved thermal
characteristics. These retainers conform to
the DSCC 85034 specification.
NW125/126
Material:
0.41 (.016) thick Stainless Steel
Type 301, Cond. 1/2 H, ASTM -A240
Series NW125/NW126/NW165/NW166 retainers Finish:
Part Number Code
Mounting holes are offset Passivate per MIL -S-5002
from card path and occur
Series every inch, offering a choice
NW125, NW126, NW165, NW166 of mounting patterns WEIGHT
NW125 -06 -3.25 N .32 g/cm (.029 oz/inch)
PCB Thickness
1.6 (.063) _______________________ 06 SPRING RATE
2.4 (.094) _______________________ 09
60.4 N/cm (34.5 lbs/in) of deflection
Length per spring finger
31.75 (1.25) to 311.15 (12.25) ________ length.xx
in 25.4 (1.00) increments. Coined edges allow
Other lengths available on request smooth insertion and NW165/NW166
Finish (NW165/NW166 only) extraction without
damage to card
Material:
Nickel plate ______________________________ N 0.41 (.016) thick Alloy 10 Beryllium
or choose from Finish Table
Copper
FINISH TABLE Cond. “AT” per Mil-C-81021
Code Finish:
Spring fingers hold
Letter Finish printed circuit board
See Part No. Code
[blank] NW125/NW126: passivated against rigid side for
thermal and electrical
NW165/NW166: no finish contact. It also provides SPRING RATE
dampening under
For NW165/NW166 only shock and vibration. 56.0 N/cm (32 lbs/in) of deflection per
“T” Bright Tin plate per Mil-T-10727 spring finger
.005 (.0002) min.
“N” Nickel plate per QQ-N-290 Cl. 1, Gr. F WEIGHT
“ZN” Zinc plate per ASTM-B633 Type III (clear), SC1 Turned in tabs and rigid
.38 g/cm (.034 oz/in)
“EN” Electroless nickel plate per Mil-C-26074 Cl. 1 Gr. B wall limit card excursion
under dynamic loading

91
Part Number Code Example:
890664

Break sharp edges.

NW165-09-4.25EN
Cold wall
Series NW165 BeCu with Electroless
Dash PCB B Dimension G Dimension Nickel finish,
No. Thickness +0.38 (.015) +0.0 (.00) 107.95 (4.25) long designed for 2.4
\-0.0 (.000) \-0.80 (.03)
Printed Circuit Board (.094) thick
4.32 ± .13 -06 1.6 (1/16) 2.41 (.095) 3.94 (.155) printed circuit boards
(.170 ± .005)
Recommended -09 2.4 (3/32) 1.65 (.065) 3.18 (.125)
Mounting Dim

Series NW125/NW126 = 3.18 (.125)

Series NW165/1NW66 = 4.19 (.165)
Length
G B
(see table) (see table)

6.50
(.250)
3.68 ± .13
25.40 ± .13 (.145 ± .005)
2.44 ± .05 (.096 ± .002) Dia. Typ. 4.19 (.165) Typ. (1.000 ± .005)
Tol. Noncum.
19.05 (.750) Typ. Series NW125/NW126 = 2.54 (.100)
Units: mm (in) 3.18
NW125/NW165 Shown (.125) Series NW165/NW166 = 3.56 (.140)
.xx=±.25, .x=±.5
(.xxx=±.010, .xx=±.02) NW126/NW166 Opposite Typ.
89066492

www.calmark.com • 800-854-7086 62
 Series 115-287 - Nylon Guides
Calmark offers the Series 115-287 Card
Guide, a most unique design in PC card
guides. The Series 115-287 Card Guide
allows users of louver or lance type card
guides to easily change to an insulated
nylon card guide with a minimum
modification of strength and air flow.
FEATURES
• Available for 1.61 (.063) and 2.43 (.094)
thick printed circuit boards
• Unique snap-on design Series 115-287 - Nylon Guide
• Secure and easy installation
• Wide lead-in for easy card entry 7.6 (.30) 5.21 (.205) 45° Typ. Part No. Gap Dimension
115-287 1.93 (.076)
• No mounting hardware required
115-287-3 2.69 (.106)
• Metal web support provides
strength and rigidity 4.75 (.187) 29.2 (1.15) 13.5 (.53) 4.8
(.19)
13.5 (.53)
8.89 (.350)
• Narrow profile for excellent airflow 1.27 (.050)
82.6 (3.25) .76 ± .05
(.030 ± .002)
• No mounting holes required Gap ± .013
(.005) see table
• Economical
2.41 ± .13
4.8 (.095 ± .005)
MATERIAL 1.65 ± .05
(.065 ± .002) 3.05 Units: mm (in)
72.90 ± .13 (2.870 ± .005) (.19) 5.21 ± .13
(.205 ± .005)
Nylon 6/6. Meets UL 94V-2. (.120) .xx=±.25, .x=±.5
(.xxx=±.010, .xx=±.02)
Self extinguishing to flame.
May be used at 121°C (250°F)
continuously. Resistant to
alkalies, weak acids, and
common solvents. APPLICATION DATA Web Length
73.03 ± .13
1. Slip front end of guide on first. (2.875 ± .005)

COLOR 2. Bow guide and tuck back under.

Square Corners

Standard color is natural (white). Fits up to 1.65 (.065) thick material. Web Width

Additional colors are special 5.08 ± 0.13

(.200 ± .005)

order. Contact factory for

availability.

Part Number Code

Series 115-287

Suffix options
For board thickness 1.5 (.06) ____________ [blank]
For board thickness 2.4 (.093) -3

For color options other than standard color white, add suffix:
White ____________________________________ [blank]
For other colors add BLK, BRN, ORG, YEL, GRN, BLU_______________ XXX
(Colors other than White will require special order and part number)

63 www.calmark.com • 800-854-7086
 Series 120 and C120 - Nylon Guides
Calmark offers the Series 120 and C120
snap-in PCB Nylon Card Guide.
120 FEATURES
• Easy and secure snap-in design
• Extra deep guide
• Wide lead-in for easy card entry
• No mounting hardware required
• Narrow profile for excellent airflow
• Mid-span mounting point option for
greater stability
Series 120 - Nylon Guide • Available in 1.6 (.063) and 2.4 (.094)
board gap widths
• Economical
Series C120 includes the above
features Plus:
• Molded in conductive material
• Provides surface resistivity of 105 ohms
per square
MATERIAL
Series 120: Nylon 6/6 or 6.
Meets UL94V-2 self-extinguishing to
flame or UL94V-0 (see part number
Series C120 - Nylon Guide (conductive) configuration). May be used at 121°C
(250°F) continuously.
Resistant to alkalies, weak acids
and common solvents.
6.4 (.25) Typ. Series C120: 10% Graphite Filled
Standard: 1.93 ± .13 (.076 ± .005)
for -3: 2.69 ± .13 (.106 ± .005)
Polycarbonate. Meets UL94V-2.
Length ± .8 (.03)
6.4
(.25)
COLOR
1.19 ± .08
(.047 ± .003)
Series 120: Standard color is natural
(white). For other colors append BLK,
3.18
(.125) BRN, RED, ORG, YEL, GRN, BLU, VIO or
(Length - 12.7 (.500))/2 ± .8 (.03)
if applicable. See table 3.18 ± .13 GRY to part number.
Length - 12.7 (.500) ± .8 (.03)
(.125 ± .005)
Series C120: available in black only.
3.35 ± .05
(.132 ± .002)
Units: mm (in) .xx=±.25, .x=±.5 Dia.
(.xxx=±.010, .xx=±.02)
Part No. Length Color add suffix (standard is white)
120-400 101.6 (4.00) BLK, BRN, ORG, YEL, GRN, BLU Rear (and Center) Mounting Slots:
Series 120 & C120
120-600 152.4 (6.00) BLK, BRN, ORG, YEL, GRN, BLU 3.02 ± .13 (.120 ± .005) x 5.54 (.218)

120-700 177.8 (7.00)* BLK, BRN, ORG, YEL, GRN, BLU INSTALLATION DATA
Snap-in with sharp impact.
120-700X 177.8 (7.00) BLK, BRN, ORG, YEL, GRN, BLU No special installation tools
required. Fits up to
120-850 215.9 (8.50)* BLK, BRN, ORG, YEL, GRN, BLU 1.91 (.075) thick material. 63
00
09
120-850X 215.9 (8.50) BLK, BRN, ORG, YEL, GRN, BLU 89

120-950 215.9 (9.50)* BLK, BRN, ORG, YEL, GRN, BLU

C120-400 102.1 (4.02) BLK, BRN, ORG, YEL, GRN, BLU
C120-600 153.2 (6.03) BLK, BRN, ORG, YEL, GRN, BLU
C120-700 178.8 (7.04)* BLK, BRN, ORG, YEL, GRN, BLU
C120-700X 178.8 (7.04) BLK, BRN, ORG, YEL, GRN, BLU
C120-850 216.9 (8.54)* BLK, BRN, ORG, YEL, GRN, BLU
Front Mounting Hole:
C120-850X 216.9 (8.54) BLK, BRN, ORG, YEL, GRN, BLU Series 120
C120-950 242.6 (9.55) BLK, BRN, ORG, YEL, GRN, BLU 3.25 +.03/-.08 (.128 +.001/-.003) Dia.
Series C120
(Colors other than White will require special order and part number) 3.20 +.03/-.08 (.126 +.001/-.003) Dia.
*Indicates presence of a mid-mounting post
For 2.4 (.094) thick pcb, include a “-3” suffix to part number
For UL94V-0 option add VO” prefix to part number

www.calmark.com • 800-854-7086 64
 Series 103-107 Nylon Extractors
Calmark offers Card Extractors for efficient
extraction of Printed Circuit Board from
connectors and the Series 107 Card Inserter-
Extractor for efficient insertion and extraction
of Printed Circuit Board in high density
connector contact and multiple connector
applications.

FEATURES
• Lever action for safe easy card extraction
• Ample gripping and pushing surfaces for
extracting and inserting card
• Available in colors for coding
• Generous area for hot stamp marking
• Exact replacement for other manufacturers
MATERIALS
All Series 107 nylon extractors are molded in Nylon Extractors
Glass Filled (30%) 6/6 or Type 6 Nylon. See
table for flammability ratings. UL94-V0 parts Series Standard Mechanical
Feature Board Thickness UL 94 Figures
are self extinguishing to flame. Part Number Color Advantage
103 ED 1.6 (.063) natural V-2 3:1 2/A
May be used at 121°C (250°F) continuously. V103 E 1.6 (.063) natural V-0 3:1 2/A
Resistant to alkalies, weak acids, and common
107 IED 1.6 (.063) black V-0 4.5:1 1/C
solvents.
107-3 IED 2.4 (.093)/3.2 (.125) black V-0 4.5:1 1/C
ROLL PINS 107-10 IED 1.6 (.063) black V-0 3.3:1 2/C
• 2.38 (.094) dia x 6.35 (.250) long 107-10-3 IED 2.4 (.093) black V-0 3.3:1 2/C
Series 107, 107-10, 107-20, 107-20-3, 107-20 IEL 1.6 (.063) black V-2 4.5:1 3/D
107-70, 107-70-3
V0107-20 IEL 1.6 (.063) black V-0 4.5:1 3/D
• 2.38 (.094) dia x 7.95 (.313) long 107-20-3 IEL 2.4 (.093) black V-2 4.5:1 3/D
Series 107-3, 107-10-3, 107-70-4 V0107-20-3 IEL 2.4 (.093) black V-0 4.5:1 3/D
COLOR 107-70 IEL 1.6 (.063) black V-0* 4.5:1 4/D
Other colors available; see part number 107-70-3 IEL 2.4 (.093) black V-0* 4.5:1 4/D
code. Series 107 standard color is black. 107-70-4 IEL 3.2 (.125) black V-0* 4.5:1 4/D
For standard colors, a color suffix is not Feature: I = Inserter E = Extractor L = Latching D = meets DSCC 83023
necessary. For Pre-start pin feature, add “P” prefix to part number
*Main handle portion is UL-94V0, but latch is UL94-V2
HOT STAMPING Add suffix WHT for natural color. Standard colors are natural or black. Contact factory for availability of other colors.

Hot stamp marking service is available.

Please contact an Application Engineer
with your requirements.
SERIES P - PRE-STARTED
ASSEMBLY PIN
Calmark offers any of our extractors and
inserter-extractors with the option of
Pre-Started Assembly Pin.
Assembly Pin

Pin protrusion of approx. .38

(.015) seeks hole in PCB

FEATURES
• Faster and easier installation of extractor
to PC card
• Eliminates need for special tools or
equipment and set-up time
• Eliminates loss of loose assembly pins

65 www.calmark.com • 800-854-7086
 Series 103 to 107 - Nylon Extractors

12.7
(.500)
11.05
(.435) 11.05
(.435)

50.8
(2.00)
38.1
3.96 (1.50)
3.96 (.156) R
(.156) R

*8.89 (.350)
12.06 for 2.4 (.094)
*8.89 (.350) (.475) and 3.2 (.125)
12.06 for 2.4 (.094) thick boards
(.475) and 3.2 (.125)
thick boards 7.37*
(.290)
7.37*
(.290)
FIG. 1 FIG. 2

1.6 22.35(.880)
(0.7)

50.8
5.6 (2.00)
(.22)
3.96 47.5
3.96 (.156) R (1.87)
(.156) R

12.06 12.06
(.475) (.475)

11.05 7.37*
7.37 (.435 ) (.290)
(.290) *8.89 (.350) Units: mm (in)
for 3.2 (.125)
thick boards Unless otherwise specified:
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
FIG. 3 FIG. 4

APPLICATION DATA FIG. A FIG. B

Two inserter or inserter- 2.77
2.77
extractors are recommended per (.109) (.109)
printed circuit board taller than 6.35 6.35
127 (5) in height. (.250) (.250)

6.4 (.250)
x 45°
Units: mm (in) 6.35 Chamfer 6.35
Unless otherwise specified: (.250) (.250)
.xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)

Provides insertion and extraction travel of 8.9 (.35) min.

Nominal position of card edge when seated

inconnector. The Inserter-Extractor will allow 1.3 2.77
(.05) overtravel for tolerance take-up. (.109)

6.35
7.24 ± .38 1.5 (.06)Ref. (.250) 18.5 (.73)
(.285 ± .015) Card Guide
Surface 9.1
(.36)
1.5 (.06)max.
6.1 (.24)min. 6.35
Detail of Actuating Surfaces
Required on Top and Bottom Guide Plates
(.250) FIG. C

2.38 22.86±.13
Provides insertion and extraction travel of 8.9 (.35) min. (.900 ± .005)
(.094)
Dia.
Nominal position of card edge when seated
inconnector. The Inserter-Extractor will allow 1.3
(.05) overtravel for tolerance take-up. 2.28 ±.13
(.090 ±005)

6.35
7.24 ±.38 1.5 (.06) (.250)
(.285 ± .015) 18.5 (.73)
Card Guide
Surface 9.1
(.36)
1.5 (.06) max.

6.1 (.24) min. 6.35 2.77

(.250) (.109)
Dia. FIG. D

www.calmark.com • 800-854-7086 66
 Series 107 Aluminum Inserter - Extractors
Calmark offers the Series 107 Aluminum
Inserter-Extractor for safe and easy
insertion and extraction of printed circuit
boards in the most severe applications.
This product series offer a wide range of
inserter-extractor with varying features
from mechanical advantage ratios, color,
board thickness, etc. If you don’t see one
here that meets your requirements, please
contact our Applications Engineers with
your specification.
FEATURES
• “Ultra strong” lever action design
overcomes insertion and extraction Series 107-50 - Inserter/Extractor (Aluminum)
forces of highest possible limits
• Widths from 7.37 (.290) to 7.92 (.312) Standard Mechanical
Series Feature Board Thickness Figures
Color Advantage
for printed circuit boards ranging from
107-35 IE 1.6 (.063) black 5.5:1 1/A
1.6 (.063) to 3.2 (.125) thick
C107-35 IE 1.6 (.063) clear 5.5:1 1/A
• Actuates from a simple “U” channel form
107-35-3 IE 2.4 (.093) black 5.5:1 1/A
• Mounting detail on card retrofits other C107-35-3 IE 2.4 (.093) clear 5.5:1 1/A
industry standards
107-35-4 IE 3.2 (.125) black 5.5:1 1/A
• Available in black anodize or clear C107-35-4 IE 3.2 (.125) clear 5.5:1 1/A
chemical film
107-50 IE 1.6 (.063) black 4.5:1 2/B
• Generous area for identification
C107-50 IE 1.6 (.063) clear 4.5:1 2/B
markings
107-50-3 IE 2.4 (.093) black 4.5:1 2/B
• Strong and Ultra-strong lever action
C107-50-3 IE 2.4 (.093) clear 4.5:1 2/B
overcome high insertion and extraction
forces 107-50-4 IE 3.2 (.125) black 4.5:1 2/B
C107-50-4 IE 3.2 (.125) clear 4.5:1 2/B
• 107-73 and 107-75 offers a positive
locking feature 107-51 IE 1.6 (.063) black 3.3:1 3/B
C107-51 IE 1.6 (.063) clear 3.3:1 3/B
MATERIALS/FINISH 107-51-3 IE 2.4 (.093) black 3.3:1 3/B
C107-51-3 IE 2.4 (.093) clear 3.3:1 3/B
EXTRACTOR 107-51-4 IE 3.2 (.125) black 3.3:1 3/B
Aluminum alloy 6061-T6. Black anodize C107-51-4 IE 3.2 (.125) clear 3.3:1 3/B
per Mil-A-8625, Type II Cl. 2. or Clear
107-55 IE 1.6 (.063) black 8:1 4/B
chemical film per Mil-5541 Cl 3 for a
conductive finish. Other anodize colors C107-55 IE 1.6 (.063) clear 8:1 4/B
or a gold chemical film also available. 107-55-3 IE 2.4 (.093) black 8:1 4/B
Please contact an Application Engineer C107-55-3 IE 2.4 (.093) clear 8:1 4/B
with your requirements. 107-55-4 IE 3.2 (.125) black 8:1 4/B
C107-55-4 IE 3.2 (.125) clear 8:1 4/B
ROLL PIN
107-73 IEL 1.6 (.063) black 4.2:1 5/C
Stainless steel, 2.38 (.094) x 6.35 (.250)
C107-73 IEL 1.6 (.063) clear 4.2:1 5/C
[except all Series 107-35 use 7.95 (.313)
long]. Roll pins are furnished with each 107-73-3 IEL 2.4 (.093) black 4.2:1 5/C
inserter-extractor. [Series 107-73 and C107-73-3 IEL 2.4 (.093) clear 4.2:1 5/C
107-75, two roll pins] 107-73-4 IEL 3.2 (.125) black 4.2:1 5/C
C107-73-4 IEL 3.2 (.125) clear 4.2:1 5/C
107-75 IEL 1.6 (.063) black 7:1 6/C
C107-75 IEL 1.6 (.063) clear 7:1 6/C
107-75-3 IEL 2.4 (.093) black 7:1 6/C
C107-75-3 IEL 2.4 (.093) clear 7:1 6/C
107-75-4 IEL 3.2 (.125) black 7:1 6/C
C107-75-4 IEL 3.2 (.125) clear 7:1 6/C
Feature: I = Inserter E = Extractor L = Latching
For Pre-start pin feature, add “P” prefix to part number

67 www.calmark.com • 800-854-7086
 Series 107 Aluminum Inserter - Extractors
11.18 12.7
(.440) (.50) 12.7
9.91 (.50)
(.390)

50.8
(2.00) 3.96
43.2 (.156) R 38.1
(1.70) (1.50)
3.96 3.96
(.156) R (.156) R
8.26 12.06
(.325) (.475)
12.06
(.475) 7.37
FIG. 2 (.290)
FIG. 1 7.92 7.37
FIG. 3
(.312) (.290)
12.7
(.50) 22.4 (.88)
22.4 (.88)

50.8
47.5 (2.00)
(1.87) REF

12.06
(.475)

12.7 (.50) 7.37

(.290)
82.5
(3.25)
88.9 FIG. 5
(3.50)
12.06
12.06 (.475)
(.475) Units: mm (in)
Unless otherwise specified:
.xx ± .25, .x ±.5 12.7 (.50) 7.37
(.xxx ± .010, .xx ± .02) (.290)
7.37
FIG. 4 (.290) FIG. 6

Provides insertion and extraction travel of 7.6 (.30) min.

Nominal position of card edge when seated

inconnector. The Inserter-Extractor will allow .76
(.03) overtravel for tolerance take-up. 2.36 APPLICATION DATA
(.093)
Dia. 7.87 17.8 Two inserter or inserter-extractors are recommended per printed circuit
1.02 (.040) Ref (.310) (.70)
Card Guide board taller than 127 (5) in height.
4.83 ± .25(.190 ± .010) Surface 9.4
(.37)
4.57 (.180)
Units: mm (in)
.8(.03) max. Unless otherwise specified:
2.5 (.10) .xx ± .25, .x ±.5
4.3 (.17)min. x 45° min. (.xxx ± .010, .xx ± .02)
Detail of Actuating Surfaces Chamfer
Required on Top and Bottom Guide Plates
FIG. A

Provides insertion and extraction travel of 8.9 (.35) min. 22.86±.13

Provides insertion andextractiontravel of 8.9 (.35) min. (.900 ± .005)
2.38 (.094) Dia.
Nominal position of card edge when seated
Nominal position of card edge when seated 2.77 inconnector. The Inserter-Extractor will allow 1.3
inconnector. The Inserter-Extractor will allow 1.3 2.29 ± .13
(.109) (.05) overtravel for tolerance take-up. (.090 ± .005)
(.05) overtravel for tolerance take-up. Dia.
6.35 6.35
7.24 ±.38 1.5 (.06) (.250)
7.24 ±.38 1.5 (.06) (.250) 18.5 (.73) (.285 ± .015) Card Guide 18.5 (.73)
(.285 ± .015) Card Guide Surface
Surface 9.1 9.1
(.36) 1.5 (.06)max. (.36)
1.5 (.06)max.
6.1 (.24) min. 6.35 2.77
6.1 (.24)min. 6.35 Detail of Actuating Surfaces (.250) (.109)
Detail of Actuating Surfaces (.250) Required on Top and Bottom Guide Plates Dia.
Required on Top and Bottom Guide Plates
FIG. C
FIG. B

www.calmark.com • 800-854-7086 68
 Series 109 Aluminum Extractors
Calmark offers the Series 109 narrow profile
aluminum Card Extractor for safe and
efficient extraction of Printed Circuit Board
with limited available space. Single-side
actuating foot design provides clearance
for use on boards with “Card-Lok” clamping
retainers. The Series 109 meets the
requirements of DSCC 84191.
FEATURES
• Lever action provides mechanical
advantage for efficient insertion and
extraction of printed circuit board
• Meets requirements of DSCC 84191
Series 109 - Extractor (Card-Lok Compatible)
• Narrow profile requires minimum board
space Extractor width
• Single-side actuating foot provides 4.6 Board Board Gap Extractor
clearance for use with “Card-Lok”
(.18) Tickness Thickness Dimension± Width
Dash No. 0.13 (± .005) Dimension
clamping retainers 6.9
(.27)
38.1
(1.50)
• Strong aluminum or stainless material
• Available in colored finish for coding 3.0
25.4
[blank] 1.6 (.063) 1.91 (.075) 6.4 (.25)
(.12)
R (1.00)
-3 2.3 (.094) 2.67 (.105) 6.4 (.25)
MATERIALS/FINISH
9.14 -4 3.2 (.125) 3.61 (.142) 7.4 (.29)
2.39 +.05 \ -.02 (.360)
EXTRACTOR (.094 +.002 \ -.001)
Gap
.063 thick Aluminum Alloy, type 5052- 2.3 (.09) (see table) Units: mm (in)
Unless otherwise specified:
H32 per QQ-A-250/8 Chem film or Standard
Easy Grasp Style .xx ± .25, .x ±.5
(.xxx ± .010, .xx ± .02)
anodize finish (see part number code)
or .063 thick Stainless Steel, type 304 Board Module
Assembly 6.4
per ASTM-A666. Passivated per AMS- (.25)

QQ-P-35
9.4
(.37)
ROLL PIN 2.77
Stainless Steel, 2.38 (.093) x 4.75 (.187) (.109)
Dia.
Alternate
Flat Style
long. -3 and -4 versions use 6.35 (.250)
long APPLICATION DATA
07
891046
Two (2) extractors are recommended per board. (One “L” and one
Pin included “R” per printed circuit board). Provides extraction travel of 11.4
Left-hand shown (.45) mininum, with a mechanical advantage of 4.5:1

Part Number Code Example:

Part Number Code
Series 109 Extractor P109CR-4R-BLK-SED
P F 109 CR -3 R -BLK -SED Series 109 Extractor made from stainless steel with
Prefix options pre-start pin, made for .125 thick boards, anodized
Prestarted pin option ________________ P black with ESD silkscreen for a right handed extraction.
Pin kitted with extractor _________ [blank] FINISH TABLE
Flat Style Handle ________________________ F Code
Easy Grasp Handle__________________ [blank]
Letter Finish
Suffix options
Material [blank] Chemical Film Gold
.063” thk. Aluminum Alloy 5052-H2 _____________ [blank]
.063” thk. Stainless Steel Type 304 __________________ CR -BLK Black Anodize
Board Thickness -BRN Brown Anodize
.063 (1.6) _______________________________________ [blank] -RED Red Anodize
.093 (2.4) ___________________________________________ -3 -ORG Orange Anodize
.125 (3.2) ___________________________________________ -4 -YEL Yellow Anodize
Left or Right Orientation -BLU Blue Anodize
Left ___________________________________ L -GRN Green Anodize
Right__________________________________ R -PRP Purple Anodize
Finish -CLR Clear Anodize
Chem Film Gold ___________________________________________ [blank]
Or choose from finish table ESD silkscreen will be in a contrasting color.
ESD silkscreen ______________________________________________________ SED
No ESD silkscreen _________________________________________________ [blank]

69 www.calmark.com • 800-854-7086
 Technical Applications Section
CARD-LOK
Technical Applications
For cold wall applications
The Card-Lok series of retainers offer the highest locking
Discussion
force available for cold wall applications. They mount to
Printed Circuit Board assemblies using screws, rivets or
Clamping Force Data........................... 70
adhesive bonding and are then inserted into machined Thermal Resistance – Card-Loks......... 71
channels of cold plates or heat exchangers. The wedge
design holds the Printed Circuit Board firmly in place Mounting and Installation
providing high resistance to shock and vibration while for Guides............................................ 72
producing maximum thermal transfer.
Theoretical Discussion on
Wedge-Lok & Ejector/Injectors........... 73
CHANNEL-LOK Materials & Finishes............................ 74
For sheet metal or non-machined cold wall
applications
The Channel-Lok series of locking retainers are designed Technical Reference Tables
for heavy shock and vibration, and for effective heat
dissipation in sheet metal chassis/heat sink applications. Table 1. ANSI Head Cap Screws............75
The design combines chassis mounted housing with
Card-Lok retainers. Table 2. ANSI Flat Countersunk Head
Cap Screws..........................................76
Table 3. ANSI Helical Spring Lock
Washers..............................................77
Table 4. ANSI Type A Plain Washers.....78
METAL RETAINERS Table 5. Machinability - Surface
For low cost sheet metal applications or cold wall Cutting Speeds....................................79
applications
The metal retainers offer a low cost spring action printed Table 6. Hardness Conversion Numbers
circuit board retention design. They attach to the chassis for Steel..............................................80
using screws, rivets or adhesives. Retainers provide
protection against shock and vibration and offer excellent Table 7. Sheet Gauges.........................81
grounding characteristics. Table 8. Millimeters Converted to
Decimal & Fractional Inches................82
Table 9. Conversion Factors.................83
DSCC Cross Reference..........................84
NYLON CARD GUIDES
For low cost sheet metal applications
Glossary..............................................85
Patented nylon guide entry, easy tool-less installation and
snap guides available to support low cost sheet metal
card cages.

INSERTER & EXTRACTOR

Metal and nylon designs
Calmark offers a wide selection of Injectors and Extractors
for use in both sheet metal and cold wall applications.
Available in both metal and nylon designs, these products
facilitate the insertion and extraction of printed circuit
boards with high density backplane interconnects.

www.calmark.com • 800-854-7086 70
 Clamping Force Data - Card-Loks
The clamping outputs indicated in the table below are the results of averaged data. Within each series numerous Card-Loks of various lengths,
finishes, and configurations were cycle tested. The accumulated data verified the following:
• Clamping output is not dependent on length
• Clamping output is greatly affected by choice of finish
• Clamping output is greatly improved when washers are used
Customized Card-Lok variations for specific applications are available on request

Clamping Force
Product Screw Torque
Series Setting Chem Film Finish Chem Film Finish Black Anodize Black Anodize
Size
N-cm (in-lbs) N (lbs) With Washers N (lbs) N (lbs) With Washers N (lbs)
223 4-40 N/A Consult factory Consult factory Consult factory Consult factory
224 4-40 N/A Consult factory Consult factory Consult factory Consult factory
225 4-40 68 (6) 445 (100) 778 (175) 1223 (275) 1423 (320)
E225 4-40 68 (6) 445 (100) 778 (175) 1223 (275) 1423 (320)
L225 4-40 N/A N/A N/A 533 (120) N/A
226 4-40 68 (6) 801 (180) 1402 (315) 2224 (500) 2755 (615)
227 4-40 68 (6) N/A 778 (175) N/A 1423 (320)
228 4-40 68 (6) N/A 1402 (315) N/A 2775 (615)
230 4-40 68 (6) 489 (110) 890 (200) 3334 (300) 1512 (340)
231 4-40 68 (6) 801 (180) 1402 (315) 2224 (500) 2755 (615)
235 M3 68 (6) 445 (100) N/A 1223 (275) N/A
236 M3 68 (6) 801 (150) N/A 2224 (500) N/A
240 4-40 68 (6) 489 (110) 623 (140) 1446 (325) 1490 (335)
245 6-32 110 (10) 623 (140) 1023 (230) 1779 (400) 1779 (400)
250 8-32 220 (20) 1112 (250) 1779 (400) 2958 (665) 3114 (700)
255 10-32 350 (31) 1779 (400) 2669 (600) 3336 (750) 3670 (825)
260 4-40 68 (6) N/A 1779 (400) N/A 2224 (500)
261 4-40 68 (6) N/A 667 (150) N/A 1223 (275)
L260 4-40 N/A N/A N/A 556 (125)* N/A
LE260 4-40 N/A N/A N/A 556 (125)* N/A
263 4-40 68 (6) N/A 1779 (400) N/A 2224 (500)
264 4-40 68 (6) N/A 667 (150) N/A 1223 (275)
265 4-40 68 (6) N/A 1557 (350) N/A 2113 (475)
266 4-40 68 (6) N/A 600 (135) N/A 801 (180)
267 4-40 68 (6) N/A 1557 (350) N/A 2113 (475)
280 8-32 220 (20) N/A 3336 (750) N/A 4003 (900)
281 8-32 220 (20) N/A 1245 (280) N/A 2224 (500)

* Finish is dry film lube over black anodize

71 www.calmark.com • 800-854-7086
 Thermal Resistance - Card-Loks

Testing performed by numerous users of Calmark’s Series 225 and similar size Card-Loks (approx. 6.35 [.25] high) has shown that the thermal
resistance across the interface of a card which is clamped to a cold plate will usually fall within the range of 2° to 4°C inch/watt. Three piece
Card-Loks of shorter lengths will usually provide results close to the 2, while longer Card-Loks (over 6 inches) may fall closer to the 4.
These thermal resistance numbers apply when testing is performed at or near sea level. When the same testing is performed at high
altitude or near vacuum conditions the results can be significantly affected. Increases of from 10 to 40 percent would not be unusual,
especially with the longer three piece Card-Loks.
Five piece Card-Loks, such as the Series 260 or 265, with their greater and more evenly distributed clamping force, will greatly reduce these
potential gradients.
The following chart provides an easy method of estimating the temperature rise across the interface (junction) of the card and cold plate
when thermal conductivity is the only means of heat transfer considered (heat loss due to radiation and convection minimized).

2.2

2.0
4° C IN/W
1.8

1.6
(THERMALPLANETOCOLDPLATE)
JUNCTIONRESISTANCE(°C/W)

3° C IN/W
1.4

1.2

1.0

0.8

0.6

0.4
2° C IN/W
0.2

0
0 2 4 6 8 10 12 14
LENGTH OF CARD-LOK(S) (INCHES)
(TOTAL OF PAIR)

Example: A card using a pair of 127mm (5.00 inch) long Card-Loks is clamped to a pair of cold plates and is dissipating 50 watts of power:
Total length of Card-Loks is 254 (10), [127 (5) x 2]
Junction resistance is shown as between 0.2° and 0.4°C/W
Therefore, at their junction, card temperature will rise between 10° and 20°C above the cold plate. [0.2°C/W x 50(W) = 10°C]

www.calmark.com • 800-854-7086 72
 Mounting & Installation for Card-Loks
SERIES 223-255
Series “A” Recommended
223 1.143 (0.045)
WEDGE BODY BOTTOM FACE
PCB OR MODULE
A 224 1.143 (0.045)
THICKNESS
225 1.143 (0.045)
E225 1.143 (0.045)
2-56 SCREW RIVET L225 1.143 (0.045)
226 1.270 (0.050)
227 2.667 (0.105)
228 2.667 (0.105)
230 0.889 (0.035)
SERIES 260-267 231 0.889 (0.035)
235 1.270 (0.050)
A
PCB OR MODULE 236 1.270 (0.050)
THICKNESS 240 0.762 (0.030)
245 1.143 (0.045)
250 1.905 (0.075)
2-56 SCREW SHAFT
255 1.905 (0.075)
260 4.953 (0.195)
261 4.953 (0.195)
L260 4.953 (0.195)
LE260 4.953 (0.195)
SERIES 280/281 263 4.953 (0.195)
264 4.953 (0.195)
A
PCB OR MODULE 265 4.953 (0.195)
THICKNESS 266 4.953 (0.195)
267 3.810 (0.150)
280 7.366 (0.290)
4-40 SCREW SHAFT 89066861
281 8.382 (0.330)
Screw Length and Head Style depend on
details of the application. In general, the screw
should not extend beyond the bottom face of
the wedge body or top edge of the shaft.

SUGGESTED RIVET DIMENSIONS

60° 60°
.090/.135 .200/.236
.048 FOR RIVET
Maximum TYPE MOUNTING
CARD-LOK WEDGE BODY
.032 OR SHAFT
Maximum WORK THICKNESS + WORK THICKNESS +
CLINCH ALLOWANCE CLINCH ALLOWANCE CLINCH
(SEE FIGURE) (SEE FIGURE) ALLOWANCE = WORK
RIVET BODY THICKNESS
DIAMETER
PCB OR MODULE
.061/.065 .124/.128 THICKNESS
FOR RIVET MOUNTED FOR RIVET MOUNTED
SERIES 223/267 SERIES 280/281 89066862

73 www.calmark.com • 800-854-7086
 Theoretical Discussion on Card-Lok & Inserter Extractors

Basic theory, knowledge of pertinent forces and understanding of product functionality enables an engineer to select the proper
components. The discussion below illustrates the advantage of five or more piece Card-Lok and provides information on how to calculate
insertion/extraction forces.

Inserter - Extractor Theory Card-Lok Theory

Basic theory, knowledge of pertinent forces and understanding
Fout=(N-1)Fin[(1-μ1 tan (α)) ÷ (tan(α)+μ1 + μ2(1-μ1 tan(μ)))]
of product functionality enables an engineer to select the proper
components. The discussion below illustrates the advantage of five or
Where N = number of wedge segments
more piece Card-Lok and provides information on how to calculate
α = angle of interface
insertion/extraction forces.
μ1 = friction coefficient of 45° wedge face
μ2 = friction coefficient of wedge surface in cantact with cold wall
Mc = 0 = FIN (L1 + L2) - FB(L2)
If μ1 = μ2 = μ and α = 45° then
[FB ÷ FIN] = [(L1 + L2) ÷ L2] = C
Fout=(N-1)Fin [(1-μ) ÷ (1+2-μ2)]
Example:
Calculate the inserter force exerted on the backplane connector
when 8.9N (2lbs) finger force is applied to a pair of Series 107 inserter
extractors.

FB = C Fin 2 = 4.21 (8.9N (2 lb.)) (2) = 74.9N (16.84 lb.)

89066875

Three-piece Five-piece Seven-piece

μ Fout Fout Fout
0 2.00•Fin 4.00•Fin 6.00•Fin
89066874
.05 1.73•Fin 3.40•Fin 5.19•Fin
.10 1.51•Fin 3.03•Fin 4.54•Fin
.15 1.33•Fin 2.66•Fin 3.99•Fin
Series L1 L2 FB/FIN=C
.20 1.18•Fin 2.35•Fin 3.53•Fin
101 17.475 (.688) 9.499 (.374) 2.84
.25 1.04•Fin 2.09•Fin 3.13•Fin
103 17.475 (.688) 11.099 (.437) 2.57
.30 .93•Fin 1.85•Fin 2.78•Fin
104 17.856 (.703) 9.906 (.390) 2.80
.40 .73•Fin 1.46•Fin 2.20•Fin
105 24.003 (.945) 7.874 (.310) 4.04
Fin = T ÷ kd where k ≈ .25 (friction coefficient of screw)
107 38.735 (1.525) 12.065 (.475) 4.21
d = diameter of screw and T=Torque
107-10 26.035 (1.025) 12.065 (.475) 3.16
107-20 38.735 (1.525) 12.065 (.475) 4.21
107-30 34.925 (1.375) 8.255 (.325) 5.23
107-40 38.735 (1.525) 12.065 (.475) 4.21
107-50 38.735 (1.525) 12.065 (.475) 4.21
107-51 26.035 (1.025) 12.065 (.475) 3.16
107-55 76.825 (3.025) 12.065 (.475) 7.37
107-70 35.433 (1.395) 12.065 (.475) 3.93
107-73 35.433 (1.395) 12.065 (.475) 3.93
107-75 70.485 (2.775) 12.065 (.475) 6.84
108 38.735 (1.525) 11.811 (.465) 4.28
109 28.956 (1.140) 9.114 (.360) 4.17
Values represent insertion force ratios. Extraction forces are slightly higher for these products.

www.calmark.com • 800-854-7086 74
 Materials & Finishes
Guide to Materials and Finishes Finish Options
Galvanic Corrosion Beryllium Copper Finish Options (see product pages for ordering
Galvanic corrosion occurs when dissimilar metals are in contact in the information)
presence of an electrolyte (conductive medium). Galvanic com-patibility
therefore is important if the application is in an environ-ment where an • Tin Plate per Mil-T-10727 .0002 min.
electrolyte is present. For most office environments this is of little concern. – Good corrosion resistance but will tarnish over time.
However, if the application is in a marine environment or has contact with • Nickel Plate per QQ-N-290 Class 1, Grade F
outside air then galvanic compat-ibility is necessary.
– Excellent corrosion protection along with high hardness for wear and
The table below shows a typical galvanic series. In general, the far-ther low friction.
apart two metals appear on the chart the greater the tendency for
corrosion. • Electroless Nickel Plate per Mil-C-26074 Class 1, Grade B
– Excellent corrosion protection along with good electrical conductivity
and low friction.
ANODIC (Least Noble) End Material
Magnesium Aluminum Finish Options (see product pages for ordering
Magnesium Alloys information)
Zinc
Aluminum • Chemical Film (Gold) per MIL-C-5541, Class 1A or Class 3 Chemical Film
Cadmium (Clear) per MIL-DTL-5541, Class 3, Type II
Aluminum 17ST – Other commonly used trade names associated with this process
Steel or iron include: Alodine, Alochrom, Iridite.
Cast iron • Anodize (“Soft”), per MIL-8625, Class 2, Type II (.00005” - .0003”)
Chromium-iron (active)
Ni-Resist
– Good corrosion resistance with medium abrasion resistance.
18-8 Chromium-nickel-iron (active) – Unless specified otherwise color will be black.
18-8-3 Chromium-nickel-molybdenum-iron (active) • Anodize (“Hard”), per MIL-8625, Class 2, Type III (.002”)
Lead-tin solders – Excellent corrosion and abrasion resistance.
Lead
Tin
– Unless specified otherwise color will be black.
Nickel (active) • Electroless Nickel Plate per Mil-C-26074 Class 1, Grade B
Inconel (active) – Excellent corrosion protection along with good electrical conductivity
Hastelloy C (active) and low friction.
Brasses Stainless Steel Finish
Copper
Bronzes • Passivation per MIL-S-5002
Copper-nickel alloys – Passivation is not a plating or a coating. It is a cleaning process that
Monel removes residue from manufacturing operations and enhances the
Silver Solder natural corrosion resistance of stainless steels.
Nickel (passive)
Inconel (passive) Material Properties
Chromium-iron (passive) Material BeCu BeCu HT Stainless Steel Steel
18-8 Chromium-nickel iron (passive) Type C17200 1/4H C17200 H 304 ASTM A366
18-8-3 Chromium-nickel-molybdenum-iron (passive)
Yield Strength
Hastelloy C (passive) (Mpa) 410-550 710 329 280
Silver
Tensile Strength
Carbon and graphite
Platinum (Mpa) 520-610 780 673 330
Gold Elastic Modulus
CATHODIC (Most Noble) (Gpa) 125-130 125-130 190 207

75 www.calmark.com • 800-854-7086
 Technical Reference Data

Table 1. American National Standard Hexagon and Spline Socket Head Cap Screws

www.calmark.com • 800-854-7086 76
 Technical Reference Data
Table 2. American National Standard Hexagon and Spline Socket Flat
Countersunk Head Cap Screws (ANSI B 18.3-1982)

77 www.calmark.com • 800-854-7086
 Technical Reference Data

Table 3. American National Standard Helical Spring Lock Washers

www.calmark.com • 800-854-7086 78
 Technical Reference Data

Table 4. American National Standard Type A Plain Washers

79 www.calmark.com • 800-854-7086
 Technical Reference Data

Table 5. Machinability

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 Technical Reference Data

Table 6. Hardness Conversion Numbers for Steel

81 www.calmark.com • 800-854-7086
 Technical Reference Data

Table 7. Sheet Gauges

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 Technical Reference Data

Table 8. Millimeters Converted toConversion

MM To Inch Decimal and Fractional Inches

83 www.calmark.com • 800-854-7086
 Technical Reference Data

Table 9. Conversion Factors

www.calmark.com • 800-854-7086 84
 DSCC Cross Reference

DSCC Specification Calmark Series

83023 Series 103, 104, 105 and 107 (plastic)
84103 Series 225, 230, 240
84191 Series 109
85034 Series 125/126, 165/166, NW125/NW126, NW165/NW166
89024 Series 260
89064 Series 226, 231
AA59590/18 Series 245
AA59590/1 Series L225
AA59590/2 Series E225
AA59590/3 Series V225
AA59590/4 Series 225
AA59590/5 Series 225
AA59590/6 Series V225
AA59590/7 Series 230
AA59590/10 Series V230
AA59590/11 Series V240
AA59590/12 Series 240
AA59590/13 Series 250
AA59590/14 Series V250
AA59590/15 Series 250
AA59590/16 Series V250
AA59590/17 Series 245
AA59590/18 Series V245
AA59590/19 Series 245
AA59590/20 Series V245
AA59590/21 Series 255
AA59590/22 Series V255
AA59590/23 Series 255
AA59590/24 Series V255
AA59590/25 Series VE225
AA59789/1 Series 226
AA59789/2 Series V226
AA59789/3 Series 231
AA59789/4 Series V231
AA59789/5 Series L260
AA59789/6 Series LE260
AA59789/7 Series 267
AA59789/8 Series V267
AA59789/9 Series 265
AA59789/10 Series V265

85 www.calmark.com • 800-854-7086
 Glossary

Beryllium Copper - A metal alloy consisting principally PCB - Printed Circuit Board
of copper with a small amount of Beryllium (usually PC - Printed Circuti
1%-2%)
Retention Force - The force required to move a locked
Board Module Assembly - A mechanical structure that PC board that is not connected to a backplane; unit: lbs.
supports a plug-in unit, like a power supply, radio or or oz.
CCA, etc.
Shock - A violent impact
Board Mount - Where the device is mounted onto the
PC board Thermal Grease - A compound that reduces thermal
resistance at interfaces
Card-Lok - PC board retainer using wedge
configuration to provide a locking force Thermal Resistance - Resistance to the flow of heat
usually measured as a temperature drop across an
Card Retainer - A device that securely holds a PCB or interface; units: °C per Watt per inch
Board Module Assembly in a chassis
Thermal Transfer - The passage of heat from PC board
CCA - A Conduction Cooled Assembly consisting of to chassis or heat sink
a conduction frame, extractors, wedge clamps and
backing plate or strip that is mounted to a Plug-In Unit Thermocouple - A sensor that measures temperature
for structural and thermal performance enhancement Torque - A measure of rotational force; Units: Newton-
Chassis Mount - Where the device is mounted directly meters, Newton-centimeters, inch-lbs or inch-oz.
onto the chassis or cold wall Vibration - Quick motion to and fro; oscillatory
Cold Wall or Cold Plate - The portion of the chassis Zero Entry Force - No force is required to insert or
that sinks heat away from the card to the environment extract a board into or out of a card guide or channel
Conduction - A mode of heat transfer in a stationary
medium
Contact Intimacy - Direct PCB or Board Module
Assembly contact with the cold wall for maximum heat
dissipation
DSCC - Defense Supply Center Columbus
(For 5998 documents)
Attn: DSCC-VAC, PO Box 3990
Columbus, OH 43215-5000
Tel: 614-692-0562 Fax: 614-692-6939
E-mail: 5998_Documents@dscc.dta.mil
Datum - The starting point (zero) for dimensioning a
part
Extractor - Hardware used to disengage PCB or Board
Module Assembly from backplate interconnects
Inserter - Hardware to assist insertion of PC board into
backplane interconnects
Lever Actuated - A means to activate a Card-Lok
without tools required
Normal Force - Force acting perpendicular to the long
axis of a PCB retainer such as a Wedge-Lok™
Plug-in Unit - A generic description of an assembly
usually consisting of a PCB with connectors and may
optionally have extractors and covers

www.calmark.com • 800-854-7086 86
 Notes

87 www.calmark.com • 800-854-7086
Notes

www.calmark.com • 800-854-7086 88
 Notes

89 www.calmark.com • 800-854-7086
 SKARPNÄCK

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