7,'

*&G

ASME B18.18.5169-1998

INSPECTIOM AND
UUAllTY ASSURAMCE PlAN
REQUIRING IN-PROCESS

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-

' INSPECTION AND GONTROLS

AN AMERICAN NATIONAL STANDARD

i The American Society of

Mechanical Engineers

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 The American Society of
Mechanical Engineers

A N A M E R I C A N N A T I O N A L S T A N D A R D

INSPECTION AND
QUAlin ASSURANCE PLAM
REQUIRING IN-PROEESS
INSPEETION AND CONTROLS

ASME B
I8.1 8.5M-1888
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 Date of Issuance: July 22, 1998

This Standard will be revised when the Society approves the issuance of a
new edition. There will be no addenda issued to this edition. I

ASME is the registered trademark of The American Society of Mechanical Engineers.

This code or standard was developed under procedures accredited as meeting the criteria for
American National Standards. The Standards Committee that approved the code or standard
was balanced to assure that individuals from competent and concerned interests have had an
opportunity to participate. The proposed code or standard was made available for public review
and comment that provides an opportunity for additional public input from industry, academia,
regulatory agencies, and the public-at-large.
ASME does not "approve," "rate," or "endorse" any item, construction, proprietary device,
or activity.
ASME does not take any position with respect to the validity of any patent rights asserted in
connection with any items mentioned in this document, and does not undertake to insure anyone
utilizing a standard against liability for infringement of any applicable Letters Patent, nor assumes
any such liability. Users of a code or standard are expressly advised that determination of the
validity of any such patent rights, and the risk of infringement of such rights, is entirely their
own responsibility.
Participation by federal agency representativeis) or person(s) affiliated with industry is not to
be interpreted as government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations issued in accordancewith governing
ASME procedures and policies which precludes the issuance of interpretations by individual
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volunteers.

No part of this document may be reproduced in any form,

in an electronic retrieval system or otherwise,
without the prior written permission of the publisher.

The American Society of Mechanical Engineers

Three Park Avenue, New York, NY 10016-5990

Copyright O 1998 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All Rights Reserved
Printed in U.S.A.

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 FOREWORD
(This Foreword is not part of ASME B18.18.5M-1998.)

American National Standards Committee B 18 for the standardization of bolts, screws,

nuts, rivets, and similar fasteners was organized in March 1922 as Sectional Committee
B I8 under the aegis of the American Engineering Standards Committee (later the American
Standards Association, then the United States of America Standards Institute and, as of
October 6, 1969, the American National Standards Institute, Inc.) with the Society of
Automotive Engineers and the American Society of Mechanical Engineers as joint sponsors.
Subcommittee I8 of Committee BI8 was established in September 1978 to develop
documents to cover the quality assurance provisions for internally and externally threaded
metric fasteners and accessories or associated parts.
At the March 1979 meeting of Subcommittee 18, it was agreed that the quality assurance
documents should be circulated for subcommittee consideration as proposed standards.
Subcommittee acceptance of the content ensued and the documents were approved by letter
ballot to the American National Standards Committee BI8 on March 21, 1980.
The standards were subsequently approved by the Secretariat and submitted to the American
National Standards Institute for designation as an American National Standard; they were
designated ANSI B18.18.1M-1982, B18.18.2M-1982, B18.18.3M-1982 and B18.18.4M-1982
and approved on September 14, 1982.
A periodic review of the standards, undertaken by the subcommittee in 1985. resulted
in agreement that the documents be revised to allow them to be used for inch as well as
metric products. This was done by deleting the word “metric” from the titles as well as
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from each place in the standards where it would inhibit the use of the documents for inch
as well as metric products. By retaining the “M” in the designator, the standards can be
used for both inch and metric products without having to change any references made. A
proposal containing these changes, as well as editorial corrections, was prepared and balloted
by letter ballot to ASME Committee B18. Following approval by ASME, the proposai was
submitted to the American National Standards Institute and designated an American National
Standard on January 16, 1987.
On November 16, 1990, the Fastener Quality Act (P.L. 101-592) was signed into law.
The focus of the law is to assure the user that certain fasteners conform to the specification
to which they were made through inspection and testing by accredited laboratories.
The law stresses the relationship of the product to its standard. Based on the implementation
of the law, product standards were revised to incorporate sample plans and quality system
guidelines to facilitate inspection and testing. All quality system standards in the B 18.18
series incorporate a final inspection in addition to in-process inspection and testing. A
review of various manufacturer’s quality strategies indicated the need for an in-process
quality plan that did not require final inspection and testing. To address that need, the plan
defined in ASME/ANSI B 18.18.3M-1987 was modified and brought before Subcommittee
18 of Committee BI8 at the December 1996 meeting for review and circulation.
ASME B 18.18.5M- I998 was approved as an American National Standard on January
6, 1998.

...
111

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 ASME B I 8 STANDARDS COMMITTEE
Standardization of Bolts, Nuts, Rivets, Screws,
Washers, and Similar Fasteners
(The following is the roster of the Committee at the time of approval of this Standard.)

OFFICERS
D. A. Clever, Chair
R. D. Strong, Vice Chair
S. W. Vass, Vice Chair
K. M. Padilla, Secretary

COMMITTEE PERSONNEL
J. C. Akins, Safety Socket Screw Corp.
J. Altman, Rotor Clip Co.
J. B. Belford, Lawson Products, Inc.
D. J. Broomfield, Illinois Tool Works, Inc.
J. A. Buda, SPS Technologies, Inc.
R. M. Byrne, Trade Association Management, Inc.
O. A. Clever, Deere 81Co.
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A. P. Cockman, Ford Motor Co.

T. Collier, Cam-Tech Industries, Inc.
A. C. DiCola, Wrought Washer Manufacturing, Inc.
A. Dinh, Defense Industrial Supply Ctr.
W. Downing, Consultant
B. A. Dusina, Federal Screw Works
D. S. George, Ford Motor Co.
R. J. Harrington, Spirol International Corp.
B. Hasiuk, Defense Industrial Supply Ctr.
A. Herskovitz. US. Army
J. A. Hman Rotor Clip Co.
A. C. Hood, ACH Technologies
J. Hubbard Rockford Fastener, Inc.
F. W. Kern, Society of Automotive Engineers
W. H. Kopke, ITW Shakeproof Industrial Products
J. G. Langenstein, Caterpillar, Inc.
M. Levinson, ITW Shakeproof Industrial Products
J. B. Levy, Consultant
L. L. Lord, Caterpillar, Inc.
A. D. McCrindle, Stelco Fasteners, Ltd.
K. E. McCullough, Consultant
R. Novotny, Textron
M. D. Prasad, General Motors Corp.
W. Schevey, BGM Fastener Co., Inc.
R. D. Strong, General Motors Corp.
J. F. Sullivan, National Fasteners Distribution Assoc.
R. L. Tennis, Caterpillar, Inc.
S. W. Vass, Lake Erie Screw Corp./lFI
R. G. Weber, BEI School of Engineering

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 C. J. Wilson, Industrial Fasteners Institute
R. B. Wright, Wright Tools Co.
J. G. Zeratsky, National Rivet & Manufacturing Co.

SUBCOMMITTEE 18 - INSPECTION AND QUALITY

CONTROL
C. B. Wackrow, Chair, MNP Corp.
K. M. Padilla, Secretary, American Society of Mechanical
Engineers
J. B. Belford, Lawson Products, Inc.
J. A. Buda, SPS Technologies, Inc.
R. M. Byrne, Trade Association Management, Inc.
S. J. Cole, Product Risk Reduction, Inc.
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D. S. George, Ford Motor Co.

J. Greenslade, Greenslade & Co.
A. Herskovitz, U.S. Army
J. Hubbard, Rockford Fastener, Inc.
R. W. Kerr, Kerr Lakeside
W. H. Kopke, ITW Shakeproof Industrial Products
G. S. Korin, Consultant
P. Korsmo, Consultant
J. G. Langenstein, Consultant
M. Levinson, ITW Shakeproof Industrial Products
L. L. Lord, Caterpillar, Inc.
A. D. McCrindle, Stelco Fasteners
K. E. McCullough, Consultant
L. C. Schroeder, Kansas Dept. of Transportation
D. F. Sharp, J & M Turner, Inc.
R. D. Strong, General Motors Corp.
J. F. Sullivan, National Fasteners Distributors Association
C. J. Wilson, Industrial Fasteners Institute
R. E. Wuthrich, ITW Shakeproof Automotive

vi

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 S T D - A S M E B18*18*5M-ENGL 1998 D 0759b70 Ob011787 0 2 3 D

CORRESPONDENCE WITH B18 COMMITTEE

General. ASME Standards are developed and maintained with the intent to represent the
consensus of concerned interests. As such, users of this Standard may interact with the
Committee by requesting interpretations, proposing revisions, and attending committee

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meetings. Correspondence should be addressed to: Secretary, B18 Main Committee, The
American Society of Mechanical Engineers, Three Park Avenue, New York, New York
10016-5990.
Proposing Revisions. Revisions are made periodically to the Standard to incorporate
changes which appear necessary or desirable, as demonstrated by the experience gained
from the application of the Standard. Approved revisions will be published periodically.
The Committee welcomes proposals for revisions to this Standard. Such proposals should
be as specific as possible: citing the paragraph number(s), the proposed wording, and a
detailed description of the reasons for the proposal including any pertinent documentation.
interpretations. On request, the B I 8 Committee will render an interpretation of any
requirement of the Standard. Interpretations can only be rendered in response to a written
request sent to the Secretary of the B18 Main Committee.
The request for interpretation should be clear and unambiguous. It is further recommended
that the inquirer submits his request in the following format:

Subject: Cite the applicable paragraph number(s) and a concise description.

Edition: Cite the applicable edition of the Standard for which the interpretation is
being requested.
Question: Phrase the question as a request for an interpretation of a specific require-
ment suitable for general understanding and use, not as a request for an
approval of a proprietary design or situation. The inquirer may also in-
clude any plans or drawings which are necessary to explain the question;
however, they should not contain proprietary names or information.
Requests which are not in this format will be rewritten in this format by the Committee
prior to being answered, which may inadvertently change the intent of the original request.
ASME procedures provide for reconsideration of any interpretation when or if additional
information which might affect an interpretation is available. Further, persons aggrieved by
an interpretation may appeal to the cognizant ASME committee or subcommittee. ASME
does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device,
or activity.
Attending Committee Meetings. The B 18 Main Committee regularly holds meetings, which
are open to the public. Persons wishing to attend any meeting should contact the Secretary
of the B18 Main Committee.

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 S T D - A S M E B L B - L B - 5 M - E N G L 1778 0757b70 Ob04788 T b T =

CONTENTS

...
Foreword ............................................................................ III

Standards Committee Roster ........................................................... V

Correspondence with B 18 Committee ................................................... vii

1 General Information ...........................................................

2 Description of Plan .............................................................

Figures
1 Basic Plan Outline ............................................................... 2
2 In-Process Sampling Frequency (Nondestructive) ................................... 7

Tables
1 i n Process - Nondestructive ..................................................... 4
2 i n Process - Destructive ........................................................ - 6
3 Frequency of Destructive Testing ................................................. 8
4 In-Process Testing Frequency at Setup, Shift Change, and After Machine
Adjustments ................................................................... 8
5 Receiving Inspection - Nondestructive ........................................... 9
6 Receiving Inspection - Destructive ............................................... 10
7 Receiving inspection - Sample Size ............................................. IO
Appendices
I Tables A, B, and C ............................................................. II
i1 Ordering Information ............................................................. 17

ix

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 S T D = A S M E B L B . L 8 * 5 M - E N G L L778 D 0759b70 ObOq787 9Tb D

ASME 818.18.5M-1998

INSPECTION AND QUALITY ASSURANCE PLAN

REQUIRING IN-PROCESS INSPECTION AND CONTROLS

1 GENERAL INFORMATION 1.4 Measuring and Testing Equipment

All measuring instruments, gages, and testing equip-
1.1 Basic Plan Structure
ment used to inspect and test incoming materials and
This Standard outlines a Quality Assurance Plan parts in process shall be permanently marked with a
for internally and externally threaded fasteners and unique identification number. This equipment shall be
accessories or associated parts. Provisions are included inspected and calibrated at planned intervals to National
for sampling plans, inspection frequencies, control pro- Institute of Standards and Technology (NET) standards,
cedures, and record keeping. The basic structure of or other equivalent national standards where applicable.
this plan outlines the quality assurance provisions for The dates of calibration shall be recorded. Inspection
fasteners manufactured and processed using in-process records shall be kept for a minimum of five years.
controls. Included are fasteners produced by one manu-
facturing practice requiring records of in-process inspec- 1.5 Basic Plan Outline
tion and tests which are maintained by the producer.
The basic plan outline as shown in Fig. 1 is included

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This Standard will be used in conjunction with other
accepted standards for product, testing, gaging, and to enhance understanding and use.
material, and, therefore, those provisions as well as
packaging are not included herein.
2 DESCRIPTION OF PLAN

1.2 Inspection Levels 2.1 Scope

The substantial difference in importance to the user This plan is based on the concept of quality assurance
of various characteristics and the dissimilar degrees of through in-process control. It establishes specific inspec-
control in manufacture make the subjecting of all tion functions that must be performed during each
characteristics to the same degree of inspection impracti- process and at each operation involving the production
cal. Therefore, four inspection levels have been pro- of fasteners, with the objective of producing finished
vided. fasteners that shall conform to all customer requirements
Any additional characteristics deemed applicable by as specified in engineering drawings, related standards,
the user that do not appear in the plan shall be explicitly and/or specifications.
designated by the user preferably on engineering draw- The in-process inspection and testing functions speci-
ings, related standards, and/or specifications, by the fied in engineering drawings, related standards, and/or
appropriate code letter at the time of ordering (see specifications shall be conducted by the person(s) having
Appendix II). To assist in arriving at the most appro- direct responsibility for conducting or monitoring the
priate inspection level, the Decision Table included in operation or process which generates the character-
Appendix I is recommended for guidance. istic(s).
The general plan presents a uniform control procedure
that is intended to be applicable to all important charac-
1.3 Lot Sizes
teristics used in the manufacture of fasteners. Adherence
When the acceptance number for sampling by attri- to the characteristic requirements of this plan does
butes is fixed, variation in sample size results in variation not release the contractor from the responsibility of
of acceptable quality. Therefore, to avoid this inconsist- exercising due care in the production of all parts
ency, fixed sample sizes are applied for the greatest to ensure that the requirements established for all
range of lot size. Lot sizes are restricted to a maximum characteristics shown on engineering drawings and re-
of 250,000 pieces. lated specifications have been met. This plan requires

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 INSPECTION AND QUALITY ASSURANCE PLAN
ACME 818.18.5M-1998 REQUIRING IN-PROCESS INSPECTION AND CONTROLS

in Appendix I for guidance in establishing these nonstan-

Quality Assurance Plan dard levels.
Requiring In-Process Controls
2.3 Lot Definition
I 1 A lot is a quantity of fasteners of one part number
Raw Material - Checks and Records for fabricated by the same production process from the
Each Mill Heat Used
same coil or heat number of metal as provided by the
metal manufacturer and submitted for inspection and
testing at one time.
-
Fabrication In-Process
The maximum lot size shall be no larger than 250,000
Inspection Plan
1 pieces.
I Where order size and material quantity is sufficient
to create more than 250,000 pieces of the same part
Heat Treatment - Where
Applicable, In-Process number, a new lot shall be created for each 250,000
Inspection Plan pieces of product manufactured.
Lot purity, lot identity, and lot traceability shall be
maintained from raw material through all operations
Records of Inspection to packing and shipping.
Maintained for a Minimum
of 5 Years as Objective
Evidence of Conformance 2.4 Records
The manufacturer shall maintain logs and records of
inspections and tests as required by this plan. Such
Maximum Lot Size - 250,000 Pieces records shall indicate the nature and number of observa-
tions made, the number and type of deficiencies found,
~~

the quantities of material or parts approved and rejected,

and the nature of the corrective action taken, as appro-
FIG. 1 BASIC PLAN OUTLINE
priate. Records shall also include the disposition of
rejected parts and shall be maintained for a minimum
that records of inspection and tests be maintained as of 5 years from the date of shipment of the part as
objective evidence of conformance to the plan. objective evidence of conformance to the provisions
of this plan.
2.2 Applicable Characteristics
2.5 Purchased Accessories and Parts
Applicable characteristics include all characteristics
of a part that are described by engineering drawings, Accessories, services, and partially fabricated parts
related standards, and/or specifications (see Tables 5 (e.g., washers, nuts, blanks, plating, heat treating, etc.)
and 6). Applicable characteristics also include those may be purchased by the manufacturer from other
transitional characteristics of a part that are present in suppliers for use in the production of fasteners, provided
some intermediate stage in the manufacture of the part the following conditions and requirements are met.
(see Tables 1 and 2). Asquenched hardness is an (u) The manufacturer shall be completely responsible
example of a transitional characteristic. Four levels of to the user for the quality of the final product.
inspection - A, B, C, and D - are provided in (b) The subcontractor shall provide evidence to the
the plan. Each characteristic has been assigned an manufacturer that systems are in place to support all
appropriate level. inspection and tests specified in engineering drawings,
Any additional characteristics deemed applicable by related standards, andor specifications.
the user and not appearing in the general plan, or ( c ) When the accessory, partially fabricated part, or
characteristics for which the user requires a nonstandard treatment is processed by a subcontractor, the manufac-
inspection level, shall be designated by the user, prefera- turer shall so identify the subcontractor(s) of the parts
bly on engineering drawings, related standards, and/or and designate the process performed in his records.
specifications, by the appropriate code letter at the time (d) All lots that are heat treated and/or finished by
of inquiry and ordering. Refer to the Decision Table a subcontractor and all lots that are processed by a

2
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 INSPECTION ANO QUALITY ASSURANCE PLAN
REQUIRING IN-PROCESS INSPECTION AND CONTROLS ASME 818.18.5M-1998

subcontractor following heat treatment and/or finishing setup, tooling, operator, and machine operation on each
operations shall undergo inspection by the manufacturer. characteristic at each processing station.
Final inspection may be conducted by the subcontractor The minimum in-process requirements at each ma-
upon prior written approval of the customer. chine or processing station shall be as follows.
(a) At the start of each production run, five pieces
2.6 Certification of the part shall be sampled and then checked in
accordance with Table 4 for all designated characteris-
2.6.1 When required, the manufacturer shall be capa- tics imparted to it by that machine or processing station.
ble of issuing a test report containing actual data (b) At the start of each new shift, five pieces of
acquired during in-process inspection and testing. the part shall be sampled and then checked in accordance
When applicable, test results generated by the subcon- with Table 4 for all designated characteristics imparted
tractor shall be included as part of the manufacturer's to .it by that particular machine or processing station.
certified test report. (c) When a tool is changed or when an adjustment
in machine setup is made, five pieces of the pan shall
2.7 Raw Material be sampled and then checked in accordance with Table
4 for all designated characteristics affected by the new
2.7.1 General. Raw material shall be reviewed to tool or by the setup adjustment.
determine that each coil or bundle has a mill identifica- ( d ) During the production run, the part shall be
tion and that each heat (batch, cast, melt, etc.) is checked for all designated characteristics imparted to
accompanied by a mill certification of analysis or the it by that machine or processing station in accordance
equivalent. Raw material (rod, wire, or bar) shall be with Tables 1 and 2 for nondestructive and destructive
inspected prior to release for fabrication to verify that testing, respectively. The frequency shall be determined
it conforms to the material requirements specified. in accordance with para. 2.8.2.
2.7.2 Material Specifications. Each heat (batch, (e) At the completion of each production run, the last
cast, melt, etc.) of steel used to produce heat treated piece shall be completely checked for all characteristics
parts shall have its suitability verified by chemical imparted to it by that machine or processing station.
analysis or hardenability. cf) Records shall be maintained in accordance with
para. 2.4.
2.7.3 General Quality. During manufacturing, fas-
teners shall be visually inspected on a continuing basis 2.8.2 In-Process Controls. The inspection level
to verify the quality of the raw material and its condition. shall be in accordance with Tables I and 2 for nonde-
The parts shall be examined for evidence of pipe, structive and destructive testing, respectively. The fre-
seam, cracks, bursts, and other surface discontinuities quency of sampling for testing associated with each
according to applicable specifications. code letter may be determined from the nomograph of
Fig. 2 and is a function of production rate and lot
size. Frequency of destructive testing is contained in
2.8 In-Process Inspection
Table 3.
At each machine or processing station, the part shall When the frequency of sampling is less than one
be checked during production for designated characteris- piece per hour, the time interval between sampling
tics imparted to it by that machine or processing shall be evenly spaced throughout the shift to the
station. Since it is not essential that destructive tests degree practicable.
be conducted at the time test samples are selected, the Checks made at the start of the shift or the production
producer may elect to accumulate test samples taken run, or following tool change or machine adjustment,
in process for testing at one time. This provides uniform may contribute to the specified checks under para.
sampling as intended by in-process inspection. 2.8.1(d) within the following hour only.
Visual examination of general workmanship shall
2.8.1 Fabricating Operations. Table 1 lists most include inspection for surface discontinuities, legibility
dimensional and geometric characteristics of fasteners of identification markings, duds, and general appearance.
covered in this plan with designated inspection levels.
These general inspection procedures have been estab- 2.8.3 Heat Treatment
lished on the basis of engineering and manufacturing ( a ) Process and Equiprnenr. All heat treating pro-
experience with regard to the effect of raw material, cesses (including stress relief) and heat treatment equip-

3
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 S T D * A S N E BLB*IJB.SM-ENGL 1998 0759b70 Ob04792 q90 D

INSPECTION AND QUALITY ASSURANCE PLAN

ASME 818.18.5M-1998 REQUIRING IN-PROCESS INSPECTION AND CONTROLS

TABLE 1 IN PROCESS - NONDESTRUCTIVE

Internally Externally
Inspection Threaded Threaded
Characteristic level Parts Parts

Forming Process
1 Shank diameter (body or shoulder) C WA WA
2 Length B WA WA
3 Width across flats B WA WA
4 Width across corners C WA WA
5 Shoulder or body length B NA WA
6 Width of undercut C NA WA
7 Dog point length C NA WA
8 Head height or nut thickness C WA WA
9 Wrenching height C WA WA
10 Angularity of bearing surface C NA WA
11 Bearing surface diameter 0 WA WA
12 Flat head countersunk angle C NA WA
13 Flat head axis of the conical bearing C NA WA
surface/parallel to the axis of the body
14 Shoulder chamfer B NA WA
15 Thread neck fillet 6 NA WA
16 Head diameter C NA WA
17 Flange diameter C WA WA
18 Flange thickness C WA WA
19 Recess or socket depth penetration B NA WA
20 Flat head protrusion/flushness A NA WA
21 Point diameter C NA WA
22 Countersink diameter and depth D WA NA
23 Grade and source D WA WA
24 Head and/or flange concentricity C WA WA
25 Angle, bottom of socket D NA WA
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26 Oval point radius C NA WA

27 Dog point diameter C NA WA
28 Flange flatness C WA WA
29 Radius or fillet under head D WA WA
30 Diameter of undercut 6 NA WA
31 Depth of undercut D NA WA
32 Chamfer or radius, top or bottom of head A NA WA
33 Wall thickness B NA WA
34 Under head fillet transition diameter B NA WA
35 Under head fillet transition length B NA WA
36 Angles - all points - all set screw C NA WA
configurations
37 Eccentricity of recess C NA WA
38 Concentricity of hole or socket C WA NA
39 Visual inspection [Note (111 A WA WA
40 Thread acceptability [Note (211 B/C/D WA WA
41 Socket or hole size A NA WA
42 Concentricity of head and shank (or shoulder) B NA WA
43 Dog point concentricity C NA WA
44 Total thread length B NA WA
45 Grip length 6 NA WA
46 Angularity of tapping C WA NA
47 Visual inspection [Note Il)] A WA WA
48 Concentricity of body (or shoulder) to thread B NA WA
(or pitch diameter)
49 Total runout between thread, body and head C NA WA

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 STD=ASME B L B . L B - 5 M - E N G L 1998 0759670 ObOLi773 327 D

INSPECTION AND QUALITY ASSURANCE PLAN

REQUIRING IN-PROCESS INSPECTION AND CONTROLS ACME B18.18.5M-1998

TABLE 1 IN PROCESS - NONDESTRUCTIVE (CONT'D)

Internally Externally
Inspection Threaded Threaded
Characteristic level Parts Parts

Slotting
50 Slot width C WA WA
51 Slot depth B WA WA
52 Slot alignments and location C WA WA
53 Visual inspection [Note (1)I A WA WA

Drilling
54 Cross drilled holes - location C NA WA
55 Cross drilled holes - diameter B NA WA
56 Cross drilled holes - chamfers or burrs C NA WA
57 Cross driled holes - hole alignment B NA WA

Prevailing Torque Feature

58 Width across flats C WA NA
59 Thread start A WA WA
60 Visual inspection [Note (111 A WA WA

Washer for Assemblies

61 Type of washers D WA WA
62 Washer O.D. D WA WA
63 Washer I.D. D WA WA
64 Washer thickness D WA WA
65 Visual inspection [Note (1)1 A WA WA

GENERAL NOTES:
(a) Legend: WA - when applicable
NA - not applicable
(b) Refer to para. 2.9.2 for acceptance criteria. Refer to Fig. 2 for frequency testing.
NOTES:
(1) Visual inspection for presence of plating, duds, surface discontinuities, head style, type of
recess, type of nut and washer, presence of locking feature, finish, and general workmanship.
Those characteristics previously subjected to inspection do not require reinspection.
(2) ASME 81.3M or other applicable standards and at the appropriate inspection level (B, C, or 0).

ment shall be regularly monitored to ensure process and postlubrication processes and equipment shall be
control and proper functioning of equipment. Suggested regularly monitored to ensure process control and proper
furnace and processing control checks and the-frequency functioning of equipment. Suggested process control
at which they should be made and recorded are included checks and the frequency with which they should be
in Table B in Appendix I. made and recorded are included in Table C in Appendix I.
( b ) Testing of Heat Treated Fasteners. Heat treated (b) Inspection of Finished Fasteners. Plating thick-
fasteners are fasteners that have been subjected to one ness and/or coating weight, thread fit, general appear-
or more heat treatment operations. Heat treated fasteners ance, and, where applicable, corrosion resistance of
shall be tested after all intermediate and final heat plated or coated fasteners shall be checked and recorded
treatment stages. The characteristics of the various in accordance with Tables 3 and 6.
types of fasteners and the minimum frequency of their ( c ) Performance Testing. Fasteners having unique
inspection are detailed in Tables 2 and 3. performance characteristics such as torque-tension,
( c ) Records. Records shall be maintained in accord- tension-indication, or locking elements may be per-
ance with para. 2.4. formance tested in accordance with the requirements
specified in Tables 5, 6, and 7 covering receiving
2.8.4 Finishing Operations inspection, nondestructive and destructive. All test
( a ) Processing and Equipment, All plating, coating, results shall be recorded.

5
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

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 INSPECTION AND QUALITY ASSURANCE PLAN
ASME B18.18.5M-1998 REQUIRING IN-PROCESS INSPECTION AND CONTROLS

TABLE 2 IN PROCESS - DESTRUCTIVE

Description of Control

Internally Externally Heat

Inspection Threaded Threaded Treated
Characteristic Level Parts Parts Parts

Tensile strength (wedge or axial) C NA WA WA

Asquenched hardness center [Note il)] B WA WA WA
Hardness [Note (211 A WA WA WA
Case depth B NA WA WA
Decarburization C WA WA WA

Torsional strength B NA WA WA
Washer hardness B NA WA WA
Plating thickness C WA WA WA
Corrosion resistance [Notes (3i, (4)l C WA WA WA
Hydrogen embrittlement [Note ( 9 1 WA WA WA

GENERAL NOTE:
Legend: WA - when applicable
NA - not applicable
NOTES:
(1) As-quenched hardness is checked following heating and quenching prior to tempering.
(2)Surface, core, or both, as applicable.
(3) Continuous monitoring of salt spray performance in accordance with the recommendation
of Table C in Appendix I constitutes compliance with the requirements for salt spray testing
outlined in this table.
(4) Includes salt spray and other corrosion resistance tests.
(5) Refer t o the specific product or process standard for hydrogen embrittlement test
requirements and sample size.

2.9 Acceptance and Rejection sample four times the size of the receiving inspection
sample size given in Table 7, according to the require-
2.9.1 Basis of Rejection. Any coil of rod or wire ments of Tables 5 and 6 for receiving inspection
or bundle of bars failing to meet the requirements of nondestructive and destructive, respectively. The accept-
para. 2.7 shall be held for disposition. ance criterion will be zero discrepancies in this larger
If any parts are found to be nonconforming during sample. Material still found to be nonconforming shall
any in-process inspection at any fabricating, heat treat- be dispositioned in accordance with para. 2. IO. 1 .
ment, or finishing operation, all parts produced since
the last inspection of the characteristic(s) found noncon-
2.9.3 Customer Inspection. Each lot of fasteners
forming shall be removed from further processing and
may be subjected to a receiving inspection by the user.
held for disposition.
The receiving inspection may be used to verify that
2.9.2 Acceptance Criteria the lot consists of the ordered parts and to inspect or
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

test certain characteristics that may be critical to the

2.9.2.1 Nondestructive and Destructive. If
petformance of the parts in their service application.
during in-process inspection and testing, a single non-
When used, such inspections or tests may be conducted
conforming characteristic is found, all material produced
in accordance with the requirements stated in Tables
since the last inspection of that characteristic shall be
5, 6, and 7 covering receiving inspection, nondestructive
put on hold and removed from the production flow.
and destructive.
2.9.2.2 Following removal of the nonconforming
material from the product flow, the process shall be
adjusted to produce conforming parts. Parts shall then 2.10 Disposition of Nonconforming Materials
be inspected in accordance with para. 2.8. I (c). or Patts
2.9.2.3 The material on hold may then be resam- Records of disposition shall be maintained in accord-
pled for the nonconforming characteristic(s) with a ance with para. 2.4.

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 STDOASME B L B - L B - 5 M - E N G L 1798 m 0757b70 ObOLi775 LTT m

INSPECTION AND QUALITY ASSURANCE PLAN

REQUIRING IN-PROCESS INSPECTION AND CONTROLS ASME B18.18.5M-1998

'oo'oo!l 7
6

Inspection Level

i
of
Characteristic
250,000

10,000
200,000
150,000

100,000
80,000
1 10 L
9
L
c
al
9 P
60,000 8 v)
8 50,000 7
al
o
L
.c 7 40,000 al
L 6 E
m 6 30,000
II 5
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5
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0 4
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.-
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m 4 6
.-
C
-1 .c
mo 3 w
L
C al
P
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+
al 2 g
a m
._
a

GENERAL NOTE:
USE: Starting at left-hand axis of production rate, set rate of operation and from this point, draw a straight line through
corresponding lot size to the reference line. From the reference point, draw a straight line through point for required
inspection level and extend t o right-hand axis of sampling frequency.

EXAMPLE: For production rate of 4,000 pcs/hr lot size 40,000 Level B, required sampling frequency = 3 pcs/hr.

FIG. 2 IN-PROCESS SAMPLING FREQUENCY (NONDESTRUCTIVE)

--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

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 STD-ASME B 1 8 - 1 & * 5 M - E N G L 1998 0759b70 ObOV79b 03b
1
INSPECTION AND QUALITY ASSURANCE PLAN
ACME B18.18.5M-1998 REQUIRING IN-PROCESS INSPECTION AND CONTROLS

TABLE 3 FREQUENCY OF DESTRUCTIVE als or parts that have been found to be nonconforming I
TESTING after receipt from the manufacturer.
Inspection Continuous Equipment Batch
(a) They may be scrapped. I
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

level 3 at Start of Run + EauiDment ( b ) They may be 100% sorted and ali defective parts l
removed.
A 3 per hour 3 per batch (c) They may be reworked or reprocessed to correct
B 1 per hour 1 per batch
C 1 per 4 hour per lot 1 per batch the nonconforming characteristic(s).
I
D 1 per lot 1 per batch (d) If the customer considers that the degree to which 1
the characteristic(s) deviates from specified requirements
will have no significant effect on the performance of
TABLE 4 IN-PROCESS TESTING FREQUENCY the parts in their service application, the customer may
AT SETUP, SHIFT CHANGE, AND AFTER authorize release of the parts or materials for use and
MACHINE ADJUSTMENTS advise the manufacturer.
(e) They all may be returned.
Level of Number
Characteristics of Checks 2.10.3 Shipping Authorization. Authorization to
A ship parts containing nonconforming characteristic(s)
B shall be in writing. This authorization shall include
C purchase order number, part description, drawing num-
D ber and revision level part number, lot size, nature of
nonconforming characteristic(s), and number of parts
having the nonconforming condition(s).
2.10.1 Manufacturer's Options. The manufac- When required by the user, the manufacturer shall
turer has the choice of the following options in the be capable of clearly identifying all cartons containing
disposition of those parts that have been found to be nonconforming material.
nonconforming within his plant.
(a) They may be scrapped. 2.11 Reinspection
(b) They may be 100% sorted and all nonconforming
Ali pieces which have been sorted and/or reworked
parts removed.
in accordance with para. 2.10.1 or 2.10.2 shall be
(c) They may be reworked or reprocessed to correct
resubmitted for lot sampling and inspection of the
the nonconforming characteristic(s). characteristic(s) found nonconforming and all other '

(d) The customer may be informed of the rejectable characteristics that would be affected by the repair or
items and his advice requested on their disposition. If reprocessing operation(s) at an inspection level four
the customer considers that the degree to which the times the size of the original final acceptance sample.
characteristic(s) deviates from specified requirements If no parts in the sample inspected are found defective,
will have no significant effect on the performance of the material may reenter the production flow or may
the parts in their service application, the customer may be approved for delivery or use, as applicable.
authorize release of the parts or materials for completion
of production or for shipment as applicable. 2.12 Corrective Action
(e) Parts or material may be used for another appli-
cation. When required by the user, the manufacturer shall
be capable of determining the root cause(s) of any
2.10.2 Customer's Options. The customer shall nonconforming condition and informing the user in
establish agreement with the manufacturer on one of writing what action will be taken to assure the cause
the following options for the disposition of those materi- of the nonconformance will be corrected.

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 INSPECTION AND QUALITY ASSURANCE PLAN
REQUIRING IN-PROCESS INSPECTION AND CONTROLS ASME Bi8.18.5M-1998

TABLE 5 RECEIVING INSPECTION - NONDESTRUCTIVE

Descriotion of Control

Internally Externally
Inspection Threaded Threaded
Characteristics Level Parts Parts

Body or shoulder diameter C NA WA

Length B NA WA
Width across flats B WA WA
Wrench height, min. D WA WA

Head height or nut thickness B WA WA

Head diameter B NA WA
Head style D NA WA
Angularity of bearing surface A WA WA

Flange diameter C WA WA
Thread acceptability [Note (111 BICID WA WA
Flange dimensions D WA WA
Presence of locking feature A WA WA
Visual inspection [Note (211 A WA WA

GENERAL NOTE:
Legend: WA - when applicable
NA - not applicable
NOTES:
i l ) ASME B1.3M or other applicable standards and at the inspection level (6, C, or D).
(2) Visual inspection for grade and source identification, presence of finish, duds, surface
discontinuities, type of recess or socket, type of washer, type of nut, finish, radius or fillet
under head, thread chamfer, cleanliness, lubrication, and general workmanship. Refer to
Table 7 for sample size.
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

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 STDmASME B L B * L 8 * 5 H - E N G L 1 7 7 8 0759b70 Ob04778 707 W

INSPECTION AND QUALITY ASSURANCE PLAN

ASME B18.18.5M-1998 REQUIRING IN-PROCESS INSPECTION AND CONTROLS

TABLE 6 RECEIVING INSPECTION - DESTRUCTIVE

Description of Control

Internally Externally
Inspection Threaded Threaded
Characteristics Level Parts Parts

Proof load - externally threaded D NA WA

Proof load - internally threaded B WA NA
Tensile strength (wedge or axial) C NA WA
Hardness [Note (111 B WA WA
Washer hardness B WA NA

Drive test B NA WA
Prevailing torque [Note (211 A WA WA
Torque-tension A WA WA
Ductility B WA WA
Plating thickness B WA WA
Salt spray B WA WA

GENERAL NOTE:
Legend: WA - when applicable
NA - not applicable
NOTES:
(1) Surface, core, or both, as applicable.
(2) Prevailing torque test includes thread start, all specified torque requirements, and retention,
of locking feature, when applicable. Refer to Table 7 for sample size.
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

TABLE 7 RECEIVING INSPECTION -

SAMPLE SIZE
Inspection Nondestructive Tests Destructive
Level [Note ilil lests

A 25
B 9
C 3
D 1

GENERAL NOTE:
Quench cracking observed in a single piece renders the lot
subject to rejection.
NOTE:
(1) When sample size exceeds lot size, 100% inspection is to
be applied.

10

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 STD-ASME B18-18.5M-ENGL 1998 m 0 7 5 9 b 7 0 ObOV799 8V5 m

APPENDIX I
TABLES A, B, AND C
(This Appendix is not part of ASME 818.18.5M-1998 and is included for informational purposes only.)

Is characteristic classified
as major or minor? (A
major characteristic
materially affects the
useability of the product for
its intended purpose; a
minor characteristic does
not.)

--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---
Is characteristic set by
tooling or material (not
subject to rapid change
during production)?

Is characteristic /
measured in
process?

TABLE A INSPECTION LEVEL DECISION TABLE

11

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12

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 S T D - A S M E B L 8 - 1 ô - 5 M - E N G L 1778 m 0757b70 O b O Y ô O 1 223 D

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13

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14

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 STD-ASME B L B * L 8 * 5 M - E N G L 1776 m 0757b70 Ob04803 OTb m

NOTES TO TABLE C
GENERAL NOTE:
Legend: WA -when applicable
NA - not applicable
FSTDC - frequency sufficient to demonstrate control
NOTES:
(1) For hand line operations, one piece per barrel; for automatic line operations, five pieces at start of each lot.
(2) Check daily coating weight only.
--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---

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 STD-ASME BL8-LB-5tl-ENGL 1778 0757b70 Ob04804 T32 D

--`,````,``,,,,,```,,,``,``,,,,`-`-`,,`,,`,`,,`---
APPENDIX II
ORDERING INFORMATION
(This Appendix is not part of ASME 818.18.5M-1998 and is included for informational purposes only.)

Specif¡cations
(a) Number and title of document
(b) Exceptions

Example
( a ) ASME B 18.18.5M, Inspection and Quality Assur-
ance Plan Requiring In-Process Inspection and Controls.
(6) Thread acceptability shall be based on the thread
acceptability paragraph in ASME B1.3M with an A
inspection level.

17

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 S T D - A S M E B L B - L B - 5 M - E N G L 1998 0757b70 OhOVâ05 979 m

AMERICAN NATIONAL STANDARDS FOR BOLTS. NUTS. RIVETS. SCREWS.

WASHERS. AND SIMILAR FASTENERS

Small Solid Rivets................................................................... 618.1.1-1972(R1995)

Large Rivets ........................................................................ B18.1.2-1972(R1995)
Metric Small Solid Rivets . . . . . . . . . . . ....................................... .B18.1.3 M.l983(R1995)
Square and Hex Bolts and Screws (Inc ) ............................................... 818.2.1-1996
Square and Hex Nuts (Inch Series) .................................................... B18.2.2-1987(R1993)
Metric Hex Cap Screws .......................................................... .818.2.3.1 M-l979(R1995)
Metric Formed Hex Screws ........................................ . . . . . . . . . . . . . B18.2.3.2M-l979(R1995)
Metric Heavy Hex Screws ......................................... ............. 618.2.3.3M-l979(R 1995)
Metric Hex Flange Screws........................................................ .818.2.3.4 M-l984(R1995)
Metric Hex Bolts .............................. ................................ 618.2.3.5M-l979(R1995)
Metric Heavy Hex Bolts ........................ ................................ B 18.2.3.6M-1979(Ri995)
Metric Heavy Hex Structural Bolts ................................................. .B18.2.3.7 M-l979(R1995)
Metric Hex Lag Screws ........................................................... 618.2.3.8M-l981(R1991)
Metric Heavy Hex Flange Screws .................................................. 618.2.3.9M-l984(Rl995)
Square Head Bolts (Metric Series)........... ....................... .B18.2.3.10 M.1996
Metric Hex Nuts. Style 1 ................... .......................................... .B18.2.4.1 M.1996
Metric Hex Nuts, Style 2 .......................................................... 618.2.4.2M-l979(R1995)
Metric Slotted Hex Nuts........................................................... 618.2.4.3M-1979íRl995)
Metric Hex Flange Nuts ........................................................... 618.4.4.4M-l982(R1993)
Metric Hex Jam Nuts ............................................................. 618.2.4.5M-l979(R1990)
Metric Heavy Hex Nuts ........................................................... B18.2.4.6M-i979(R1990)
Fasteners for Use in Structural Applications ................................................... 818.2.6-1996
Socket Cap, Shoulder, and Set Screws. Hex and Spline Keys (Inch Series)......................... .B18.3.1998
Socket Head Cap Screws (Metric Series) ............................................. .B18.3.1M.1986iR1993)
Metric Series Hexagon Keys and Bits ................................................ .B18.3.2 M-l979(R1990)
Hexagon Socket Head Shoulder Screws (Metric Series)................................ .B18.3.3 M-l986(R1993)
Hexagon Socket Button Head Cap Screws (Metric Series).............................. .B18.3.4 M-l986(R1993)
Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series) .................... .B18.3.5 M.l986(R1993)
Metric Series Socket Set Screws .................................................... .B18.3.6 M.l986(R1993)
Round Head Bolts (Inch Series) ................................... . . . . . . . ..B18. 5.1990
Metric Round Head Short Square Neck Bolts ....................... ................ .618.5.2.1 M-1996
Metric Round Head Square Neck Bolts ............................ ... .B18.5.2.2 M-1982
Round Head Square Neck Bolts With Large Head (Metric Series) ............................ .B18.5.2.3 M-1990
Wood Screws (Inch Series) ......................................... 818.6.1-1981 (R1991)
Slotted Head Cap Screws. Square Head Set Screws, and Slotted Head B 18.6.2-1972(R 1993)
Machine Screws and Machine Screw Nuts ........................... B 18.6.3-1972(R1983)
Thread Forming and Thread Cutting Tapping Screws and
Metallic Drive Screws (Inch Series) .................................................. B18.6.4-1981(R1991)
Metric Thread Forming and Thread Cutting Tapping Screws ........................... .B18.6.5 M.l986(R1993)
Metric Machi ne Screws ............................................................. B18.6.7M-1985(R 1993)
General Purpose Semi-Tubular Rivets. Full Tubular Rivets. Split Rivets
and Rivet Caps .................................................... . . . . . . . . . . . . . . . B18.7-1972(R1992)
Metric General Purpose Semi-Tubular Rivets ........................... . . . . . . . . . . .B. 18.7.1M-l984(R1992)
Clevis Pins and Cotter Pins (Inch Series) . . ................................................. 618.8.1-1994
Taper Pins, Dowel Pins. Straight Pins. Gro d Pins, and Spring Pins (Inch Series) . . . . . . . . . . . . B18.8.2-1995
Spring Pins - Coiled Type (Metric Series) .................................................. B18.8.3M-1995
Spring Pins - Slotted (Metric Series) ...................................................... B18.8.4M-1994
Machine Dowel Pins - Hardened Ground (Metric Series). . . . . . . . . . . . . . . . . . . B18.8.5M-1994
Cotter Pins (Metric Series)........................................ ...................... B18.8.6M-1995
Headless Clevis Pins (Metric Series) ........................................................ B18.8.7M-1994
Headed Clevis Pins (Metric Series) ... .................................................. B18.8.8M-1994
Grooved Pins (Metric Series) ....................................... . . . . . . . . . . . . B18.8.9M-1998
Plow Bolts (Inch Series) ...................................................................... .B18.9.1996
Track Bolts and Nuts ................................................................. B18.10-1982(R1992)
Miniature Screws . . . . . . . . . . ................................... . . . . . . . .B18.1 1.1961(R1992)
Glossary of Terms for Mecha ers ................................ . . . . . . . . B18.12-1962(R1991)
Screw and Washer Assemblies - Sems (Inch Series) .......................................... .B18.1 3-1996
Screw and Washer Assemblies - Sems (Metric Series) . . . . ....................... B18.13.1M-1991

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 Forged Eyebolts ...................................................................... 618.15~1985(R1995)
Mechanical and Performance Requirements for Prevailing-Torque Type
Steel Metric Hex Nuts and Hex Flange Nuts ....................................... .618.16.1 M.1979iR1995)
Torque-Tension Test Requirements for Prevailing-Torque Type
Steel Metric Hex Nuts and Hex Flange Nuts ....................................... .618.16.2 M.l979(R1995)
Dimensional Requirements for Prevailing-Torque Type Steel
Metric Hex Nuts and Hex Flange Nuts ............................................ .B18.16.3 M.1982íR1993)
Wing Nuts, Thumb Screws, and Wing Screws .......................................... .618.1 7.1968íR1983)
Inspection and Quality Assurance for General Purpose Fasteners...................... 418.18.1 M.1987W1993)
Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners .......B18.18.2 M.1987íR1993)
Inspection and Quality Assurance for Special Purpose Fasteners ......................
B18.18.3 M.1987íR1993)
Inspection and Quality Assurance for Fasteners for Highly Specialized
Engineered Applications ........................................................ .618.18.4 M.l987(Rl993)
Inspection and Quality Assurance Plan Requiring In-Process Inspection and Controls ........... 618.18.5M-1998
Quality Assurance Plan for Fasteners Produced in a Third Party Accreditation System .......... B18.18.6M-1998
Quality Assurance Plan for Fasteners Produced in a Customer Approved Control Plan .......... B18.18.7M-1998
Lock Washers (Inch Series) .................................................................

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818.21.1-1994
Lock Washers (Metric Series) ............................................................. 618.21.2M-1994
Metric Plain Washers ............................................................... 618.22M-l981(R1990)
Plain Washers ..................................................................... 618.22.1-1965(R1990)
Part Identifying Number (Pin) Code System Standard for 618 Externally
Threaded Products ...................................................................... 618.24.1-1996
Square and Rectangular Keys and Keyways ................................................ 618.25.1M-1996
Woodruff Keys and Keyways ............................................................. 618.25.2M-1996
Helical Coil Screw Thread Inserts (Inch Series) ............................................... 618.29.1-1993

The ASME Publications Catalog shows a complete list of all the Standards published by the Society . For a
complimentary catalog. or the latest information about our publications. call I-800-THE-ASME í1.800.843.2763) .

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 STDeASME B 1 ô - L B - S M - E N G L 1778 9 0757b70 ObO‘4807 7‘41 m

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