https://www.ochiai-if.co.

jp/en/

Headquarters
1-11-12 Kameido, Koto - ku, Tokyo 136 - 0071
TEL. +81-3 -3636 - 8800

Sales Offices in Japan

Tokyo Sales Office 1-11-12 Kameido, Koto-ku, Tokyo 136-0071
TEL. +81-3-3636-8811
Osaka Sales Office 7-12-15 Nishinakajima, Yodogawa-ku, Osaka-shi,
Osaka 532-0011
TEL. +81-6-6304-6051
Nagoya Sales Office 1-4-4 Osu, Naka-ku, Nagoya-shi, Aichi 460-0011
TEL. +81-52-211-5041
Hamamatsu Sales Office 593 Yakushicho, Higashi-ku, Hamamatsu-shi,
Shizuoka 435-0017
TEL. +81-53-421-2415
Hiroshima Sales Office 3F Lifement Funairi, 6-1 Funairimachi, Naka-ku,
Hiroshima-shi, Hiroshima 730-0841
Kumagaya Sales Office TEL. +81-82-532-1050
142-5 Ishihara, Kumagaya-shi, Saitama 360-0816
TEL. +81-48-524-1345

Global Offices
Ochiai International Rm. 1712, Ruijin Building, No.205 Maoming Road
Trading (Shanghai) (S), Huang Pu District, Shanghai 200020 China
Co., Ltd. TEL. +86-21-5466-1515
OCHIAI USA,INC. 640-B Pond Drive, Wood Dale, IL 60191, U.S.A.
TEL. +1- 630 - 595 - 3323
OIF MEXICANA S.A. Multitenant III, Av. Mineral de Valenciana
DE C.V. #202 Col. Parque Santa Fe, Mz. 2 Lt. 120,
Guanajuato, Puerto Interior Silao, GTO.,
C.P.36275
TEL. +52 - 472 -7489298
OCHIAI THAILAND 2 Jasmine City 12F, SOI SUKHUMVIT 23
CO., LTD. Prasanmitr , Klongtoey Nua, Wattana,
Bangkok 10110 Thailand
TEL. +66-2612-7332

Production Sites in Japan

Chiba Factory 1650-1 Kotehashi-cho, Hanamigawa-ku,
Chiba-shi, Chiba 262-0013
TEL. +81-43-259-2531
Fukushima Factory 3 Oguri Ikenokubo, Sukagawa-shi, Fukushima
(Fukushima Ochiai 962-0722
Co., Ltd.) TEL. +81-248-79-2131

Global Production Sites

PT. OCHIAI MENARA Kawasan Industri KIIC, Jl Maligi Raya Lot
INDONESIA K-1, Desa Sukaluyu, Kecamatan Teluk,
Jambi Timur, Karawang Barat 41361, Indonesia
TEL. +62 - 21- 8911- 4117
OCHIAI VIETNAM Plot C - 8 - Thang Long Industrial Park -
CO.,LTD. Lieu Xa Commune - Yen My District,
Hung Yen Province - Vietnam
TEL. +84 - 221- 3974 - 801 OS23-12
 Making Progress from
the International Perspective

Since its foundation, Ochiai has made efforts to

achieve technological improvements and
modernization of equipment and to establish the business organization with
a corporate philosophy of supplying users with higher-quality products,
lower in price and faster in delivery .
Ochiai has expanded its market not only in Japan but also to America,
Europe and Southeast Asia as a full-line manufacture of
industrial fasteners including a variety of retaining rings,
spring pins and steel nuts and now it keeps on
growing to be a global supplier with high industrial and
as well social expectations.
Our products are widely used for fastener component applications
in all areas such as home electric appliances,
automobiles, communication equipment,
industrial machines and precision instruments.
And they are acknowledged in excellence of product quality for each area.
 Table of Contents
1
1
PRODUCT LIST 02

2 RETAINING RINGS 03 PRODUCT LIST

Types of Retaining Rings ( Characteristics and Instructions for Use ) 03
Calculations for Retaining Rings ( Reference ) 05
(1) Allowable Thrust Load (2) Calculation of Stress (3) Beveled Rings
Specification Sheets of Retaining Rings
(1) Thrust Direction Mounting Types (Groove required to be machined ) 11 Name Designation Page Name Designation Page
( 1 ) Basic Internal Ring ( RTW ) ( 2 ) Basic External Ring ( STW ) ( 3 ) Inverted Internal Ring ( IRTW )
( 4 ) Inverted External Ring ( ISTW ) ( 5 ) Beveled Internal Ring ( MT ) ( 6 ) Beveled External Ring ( NT )
Basic Internal Ring RTW 11-12 Wave Washer WW 31
(2) Radial Direction Mounting Type (Groove required to be machined) 19
( 1 ) E-Ring ( ETW ) ( 2 ) Bowed E-Ring ( BETW ) ( 3 ) C-Ring ( 5103 ) ( 4 ) U-Ring ( UTW )
Basic External Ring STW 13-14
3 PUSH NUTS 22 Wave Washer BWW 32
for Bearing
Types of Push Nuts ( Characteristics and Instructions for Use ) 22
Inverted Internal Ring 15
IRTW
Specification Sheets of Push Nuts 24
(1) Self-locking External Nut (SPN) (2) Self-locking Internal Nut (RPN) (3) Circular External Nut (CSTW )
Curved Washer MB 35
(4) Circular Internal Nut (CRTW ) (5) Circular Push-on Nut (CSN) (6) P-Type Push-on Nut (PSN) Inverted External Ring ISTW 16
( 7 ) Cap Nut F-Type ( WS) (8) Cap Nut D-Type (DS) (9) Flat Push Nut (FSPN)
Dish Spring DB 35
4 WAVE WASHERS AND OTHERS 29 Beveled Internal Ring MT 17-18
Types of Compressed Spring Washers ( Characteristics and Instructions for Use ) 29 U-Type Plate Nut USN 38-39
Calculations for Compressed Spring Washers ( Reference ) 30 Beveled External Ring NT 17-18
(1) Wave Washer
U-Type
Specification Sheets of Compressed Spring Washers 31
E-Ring ETW 19 WUSN 40
(1) Wave Washer ( WW ) (2) Wave Washer for Bearing (BWW ) Wide Plate Nut
Calculations for Compressed Spring Washers ( Reference ) 33
(2) Curved Washer (3) Dish Spring Bowed E-Ring BETW 20 F-Type Plate Nut FSN 40
Specification Sheets of Compressed Spring Washers 35
(1) Curved Washer ( MB ) (2) Dish Spring ( DB ) C-Ring 5103 20 Spring Pin
Prevention of Settling and Combined Use 36 SPP 42
( For General Purpose )

5 SCREW TYPE PLATE NUTS 37 U-Ring UTW 21

Spring Pin
Types of Screw Type Plate Nuts ( Characteristics and Instructions for Use ) 37 ( For Light Duty )
NP 43
Self-locking 24
Specification Sheets of Screw Type Plate Nuts 38 SPN
(1) U-Type Plate Nut ( USN ) (2) U-Type Wide Plate Nut ( WUSN ) (3) F-Type Plate Nut ( FSN ) External Nut
Snap Pin SSP 45
Self-locking
RPN 24
6 SPRING PINS 41 Internal Nut Retaining Pin SSP 45
Types of Spring Pins ( Characteristics and Instructions for Use ) 41
Specification Sheets of Spring Pins 42 Circular External Nut CSTW 25 General
Joint Clip Type 46
(1) Spring Pin ( For General Purpose ) ( SPP ) (2) Spring Pin ( For Light Duty ) ( NP )
Circular Internal Nut CRTW 25
7 SNAP PINS 44
ET Holder 47
Types of Snap Pins ( Characteristics and Instructions for Use ) 44
Specification Sheets of Snap Pins 45
Circular Push-on Nut CSN 26
Dispenser (ET Stand) 48
(1) Snap Pin ( SSP ) (2) Retaining Pin ( SSP )
P-Type Push-on Nut PSN 26
8 JOINT CLIPS 46 Pliers ( A Tool to install 49
C-Type Retaining Ring )
Types of Joint Clips ( Characteristics and Instructions for Use ) 46
Specification Sheets of Joint Clips 46
Cap Nut F-Type WS 27
Joint Clip ( General Type )

9 ASSEMBLY TOOLS 47 Cap Nut D-Type DS 27

ET Holder 47
Dispenser ( For Rail Stacked For Tape Wrapped ) 48 Flat Push Nut FSPN 28
Pliers ( A Tool to install C-Type Retaining Ring ) 49

1 2
 2 RETAINING RINGS

TYPE

R E TA I N I N G
RINGS
(1) E-Ring Characteristics
TYPE This is a basic retaining ring that is mounted from the radial direction
1 (perpendicular to the axis) onto the mating shaft with a grooved surface.

PUS H NU TS
(1) Basic Internal Ring (2) Basic External Ring Characteristics
This is a basic retaining ring that is mounted from the
thrust direction (parallel to the hole or shaft) onto the (2) Bowed E-Ring Characteristics
mating hole (shaft) with a grooved surface. Can prevent looseness in the thrust direction.

WAVE WASHERS
Notes

A ND OT HERS
The retaining ring may be crushed out to prevent removal of looseness if
undue load is applied since the portion acting as a spring is short.
( 3 ) Inverted Internal Ring ( 4 ) Inverted External Ring Characteristics
There will be reverse warps (flips) or settling if undue load is applied.
Compared to C-type retaining rings, the inner diameter
(outer diameter) of the retaining ring after installation in The bowed ring may be hard to be fit with the fitting load larger from
the following reasons:The retained part is scraped during fitting

S CRE W T YPE
the groove is smaller, allowing it to be used in more

PL AT E N U TS
space-efficient locations. depending on the material (hardness) of the part. And the ring is fit on
as the portion acting as a spring is being compressed.
Compared to C-type retaining rings, the contact area
with the groove is smaller, resulting in a thrust load of
approximately 2/3. (3) C-Ring Characteristics

SPRIN G PINS
The C Ring has smaller outside diameters and can be applied where
( 5 ) Beveled Internal Ring (6) Beveled External Ring Characteristics space is limited. (This ring is effective where the outside diameter is
The Beveled Rings can reduce looseness and restricted.)
unsteadiness resulting from the accuracy of machining
to the groove position and variation of their retained
parts. (4) U-Ring Characteristics

S N AP PINS
See page 9, (3) Beveled Ring for details. It has higher thrust loads than the E-rings since it has a large area of
contact with the groove.
This snap ring can be removed using a screwdriver or other tool.
Instructions for Use
However, the snap ring after removed cannot be reused.
(1) Do not reuse these retaining rings.

J OIN T CLIPS
(2) When installing the retaining ring, do not compress (spread) more than 1% of the hole (shaft) diameter. Doing so may
prevent it from returning to the mating groove diameter, leading to the risk of play and potential dislodgment from the
groove. However, for the Beveled Ring, the amount of compression (spread) is up to the applied hole (shaft) diameter.
Instructions for Use
(3) Retaining rings are generally compressed (or spreaded) and inserted using specialized pliers (insertion with taper (1) Ensure that the Ring is set in the groove. Do not use any retaining ring that has been deformed by incorrect fitting.
tools reduces permanent deformation). There is a danger that the ring being not gripped in the groove may fall off.
(4) When fitting the retaining ring on or into retained parts, there is a danger that it (2) Do not reuse these retaining rings.
may drop out of a jig and spring out causing injury. Take enough care to prevent Spacer ring
(3) When selecting the retaining ring, check both the shaft diameter and the groove

AS SEM B LY
the ring from falling off the jig.

TO O L S
Part diameter before use.
Retaining
(5) When using the external retaining ring on a rotating shaft, the ring may drop off Spacer ring
ring (4) When using the retaining ring on a rotating shaft, the ring may drop off since it
since it will spread as the shaft is rotated at a high speed. Be sure to verify the will spread due to centrifugal force. Be sure to verify the conditions by using the Part
conditions by using the actual machine. Retaining
actual machine. ring
Shaft
(6) When retained parts have large corner radii or chamfers, the supporting point of (5) When retained parts have large corner radii or chamfers, the supporting point of
load applied to the retaining ring will vary resulting in a danger that the ring may load applied to the retaining ring will vary resulting in a danger that the ring may Shaft
fall off the groove. In this case, fit an angular plain washer-like insert having fall off the groove. In this case, fit an angular plain washer-like insert having
enough rigidity in between the parts and the ring to prevent deformation. enough rigidity in between the parts and the ring to prevent deformation.
3 4
 RE TAINING RINGS

1 (2)

R E TA I N I N G
RINGS
The allowable thrust load is a load specified when the groove is not deformed It is necessary to design the groove to obtain a sufficient thrust load of retaining ring.
and the retaining ring is not sheared. It is important to set the edge margin in this design. We recommend that the margin be set as
given below to increase the through load of groove.
Deformation of groove

PUS H NU TS
Load Retaining Deformation
ring
>3
n d= n

WAVE WASHERS
d
n: Edge margin (mm)

A ND OT HERS
( 1) d: Depth of groove (mm)
The allowable thrust load where static load is applied to If the value n/d is less than 3, attention should be paid to since the thrust load in the groove is reduced.
a retaining ring can be calculated according to the following formula: Please refer to the table of ring dimensions for the recommended dimension.

S CRE W T YPE
ADTS S

PL AT E N U TS
If n/d is equal or more than 3, the allowable thrust load can be calculated according
RS to the following formula:

S BDdG y
G1

SPRIN G PINS
RS :
A:
Allowable thrust load of retaining ring ( N )
Shape factors of retaining ring ( See Table 1)
Table 1 Shape factors of retaining rings
Shape of ring A (Retaining ring) B (Groove)
Sq
D: Shaft diameter or housing diameter ( mm) Basic External Ring 1.0 1.0
q
Beveled External Ring 1.0 1.0
T: Plate thickness of retaining ring ( mm) G1 : Static thrust load in groove ( N ) 6

S N AP PINS
The Beveled Rings need to allow for the plate
Basic Internal Ring 1.0 1.0
thickness when fit since they may be fit at half of Beveled Internal Ring 1.0 1.0 B: Shape factors of retaining ring (See Table 1)
5
the groove depth in relation to the retained work. Inverted Internal Ring 0.7 0.5 D: Shaft diameter or housing diameter ( mm)
: Circumference ratio Inverted External Ring 0.7 0.5 d: Depth of groove ( mm) 4

SS : Strength in shear of retaining ring ( N/mm2 ) E-Ring 0.3 0.3 Gy : Yield strength of groove ( N/mm2 ) See Note

J OIN T CLIPS
3
Basic External Ring (Carbon steel) : Approx. 980N/mm2 C-Ring 0.5 0.5 : Circumference ratio
as a guideline. (According to the JIS B 2804) U-Ring 0.5 0.5 2
S : Safety factors ( See Table 2 )
S : Safety factors
General safe factors are listed in a table. q : Decreasing factor, a value obtained 1
(See Table 2) Table 2 Guideline on safe factors ( S ) from the value n/d using the graph.

AS SEM B LY
TO O L S
Using the formula provided above, it is possible to calculate Type of load Safety factors However, if the value n/d is 3 or more, 1 2 3 n/d
the thrust load of the retaining ring. However, in order to Static load 3 or 4 the value q is 1.
generate the calculated thrust load, it is essential to design
the groove in accordance with the thrust load. (If the thrust Cyclic load 5
load in the groove is lower than that of the retaining ring, the Alternate load 8 Note: Since the retaining rings will come off if the groove deforms, the formula takes Yield strength of groove
groove may deform, causing the retaining ring to disengage, considering the safetiness.
Shock load 12
and you won't be able to obtain sufficient thrust load.)

5 6
 RE TAINING RINGS

The above formula assumes that retained parts If the average curvature radius in the free condition is changed to by spreading the ring
Spacer ring
have sharp corners. For retained parts having corner radii, in the Y directions as shown in the figure, this relationship is given by the following equation.

R E TA I N I N G
RINGS
care must be taken as the thrust load is reduced. Retaining Part

1 1 M
ring
If the thrust load does not satisfy the requirement because of
retained parts having corner radii or chamfers,
Shaft
the thrust load can be improved by inserting a spacer ring
r EI

PUS H NU TS
like a rigid flat washer in the groove.

Here, if I is the maximum second moment of area in the section having the maximum
width and t is the plate thickness, the value I can be expressed as tb3/12.

WAVE WASHERS
A ND OT HERS
In the above equation, assume that =r (1 + ) ( : Rate of change from r to ).
From the equation of the maximum stress, max = M/Z, M is given to be maxZ.
From the equation of the section modulus, Z=tb2/6, substituting these relations
into the above equation yields:

Eb

S CRE W T YPE
PL AT E N U TS
2 max
This section calculates the maximum stress where a retaining ring is fit.
1+ d

SPRIN G PINS
11 M
For the Internal Ring, assume that and =r (1- ).
r EI
When the retaining ring (Basic External Ring) that is circumscribed Substituting these relations in the same manner indicates
by two eccentric circles is to be spread in the Y directions as shown in the figure: the maximum stress by following formula:

S N AP PINS
M: Eb
max
Bending moment ( N·mm )
E: Longitudinal elastic modulus ( Carbon spring steel 206000N/mm2 )
I: Second moment of area ( mm ) 4
1 d

J OIN T CLIPS
r: Average curvature radius ( mm)
: Average curvature radius after ( mm) d
: Rate of change d1 Y
d2
d: Average diameter ( mm) b

d1 :

AS SEM B LY
Diameter of outer periphery ( mm)

TO O L S
d2 : Diameter of inner periphery ( mm)
Y
Z: Section modulus
t: Plate thickness ( mm)
b: Maximum rim width ( mm)

7 8
 RE TAINING RINGS

(3)
3

R E TA I N I N G
RINGS
( 1) M (Max.) M (Min.)

15°
When using the Basic Rings, the accuracy of machining in the groove Gap Plane of 15° Plane of
reference reference

PUS H NU TS
position and variation of retained parts may cause a gap between Retaining d
ring 2
the ring and the part to be retained resulting in looseness and
d d
unsteadiness (Fig. 1). This gap will cause abnormal sound and Corner of groove wall Corner of groove wall

damage to the ring.

U (Max.) U (Min.)
The conventional measures of eliminating looseness are as follows:

WAVE WASHERS
A ND OT HERS
L1 L2
By using the retaining ring with the gap adjusted by shims having a different thickness. (Fig. 1) (Fig. 4) (Fig. 5)
By using the Wave Washer or other pressurized spring.
By using the retaining ring that has a different plate thickness. 1 ) If the distance from the corner of the outer groove wall to the plane of reference is
By using the Bowed Ring and the like in which the ring is worked on an arched line. at minimum with M (Max.) and U (Max.), the retaining ring should engage at least half the
However, there are limitations of a more quantity of parts, the need of a wide variety of rings and depth of the groove (Fig. 4).

S CRE W T YPE
PL AT E N U TS
weak spring force. Thus the Beveled Ring products are developed.
> d
L1 = M ( Max. ) + U ( Max. ) + tan15°
2
(2)
2 ) If the distance from the corner of the outer groove wall to the plane of reference is

SPRIN G PINS
The Beveled Rings basically have the same structure with the Basic Rings. However, their ring at maximum with M (Min.) and U (Min.), the retaining ring should engage the full
segments to be fit in the groove have a bevel of 15 degrees differently from the basic ones. depth of the groove (Fig. 5).
This bevel is provided on the outer periphery for Internal Ring and on the inner periphery for
External Ring. These rings are designed to be set in the groove that basically has a slant of L2 <
= M ( Min. ) + U ( Min. ) + d tan15°
15 degrees of the groove wall supporting the load (Fig. 2).

S N AP PINS
Internal External
u Basic
15°
Basic
15°
(4)
t To allow the Beveled Ring to function properly, its take-up must equal or exceed
the total of the tolerances.

J OIN T CLIPS
d
tan15° > L+ M+ U
t
u
Take-up =
Basic
2
15° Basic
15° (Fig. 2)
L L ( Max. ) L ( Min. )

AS SEM B LY
It is necessary to keep such an area that is sufficiently in contact with the Beveled Ring Retained part

TO O L S
groove wall. The Beveled Ring needs to be inserted at least half the groove width. M M ( Max. ) M ( Min. )
When the Beveled Ring is inserted in the groove, it acts as a wedge between
the outer groove wall and the retained part. When there is a gap between U U ( Max. ) U ( Min. )
the Ring and the adjacent face of the retained part, the spring action of Groove
the ring will correct the gap and slide it deeply into the groove (Fig. 3). wall
(Fig. 3)
9 10
 RE TAINING RINGS

Basic Internal Ring RTW- 6 through 65 Basic Internal Ring RTW- 68 through 300
Groove dimention Unit: mm
Retaining rings Groove dimention
b d4
Size No. d3 t b a d0 d2 m Ref. n

R E TA I N I N G
m (Ref.) d1
r Basic Tol. Basic Tol. Approx. Approx. Min. Basic Tol. Basic Tol. Min.

RINGS
RTW- 68 72.5 2.5 6 7.4 2.5 53 68 71 2.7 4.5
d3 d2 d4 d1 d 2 70 74.5 2.5 6 7.4 2.5 55 70 73 +0.3 2.7 4.5
±0.45
t 72 76.5 2.5 6.6 7.4 2.5 57 72 75 0 2.7 4.5
n Size No. r (Max.) +0.14
75 79.5 2.5 ±0.08 6.6 7.8 2.5 59 .2 75 78 2.7 4.5
a 26 under 0.13 0
78 82.5 2.5 6.6 8 2.5 62 78 81 2.7 4.5
d0 26 or over 0.25 80 85.5 2.5 7 8 2.5 64 80 83 .5 2.7 5.3

PUS H NU TS
The dimention d4 is the minimum diameter of 82 87.5 2.5 7 8 3 66 82 85 .5 2.7 5.3
the inner periphery when the retaining ring is set in the hole. 85 90.5 3 7 8 3 69 85 88 .5 3.2 5.3
Size No.170 or over (Clearance inner diameter) +0.35
88 93.5 3 7.6 8.2 3 71 88 91 .5 3.2 5.3
Unit: mm
90 95.5 3 7.6 8.3 3 73 90 93 .5 0 3.2 5.3
Retaining rings Groove dimention 92 97.5 3 8 8.3 3 74 92 95 .5 3.2 5.3
Size No. d3 t b a d0 d4 d2 m Ref. n ±0.55
95 100.5 3 8 8.5 3 77 95 98 .5 3.2 5.3
(Ref.) d1
Basic Tol. Basic Tol. Approx. Approx. Min. Basic Tol. Basic Tol. Min. 98 103.5 3 8.3 8.7 3 80 98 101 .5 3.2 5.3

WAVE WASHERS
+0.04
RTW- 6 6.7 0.4 0.7 1.6 0.8 2.5 6 6.25 0 0.5 0.5 100 105.5 3 8.3 8.8 3 82 100 103 .5 3.2 +0.18 5.3

A ND OT HERS
7 7.7 0.4 ±0.03 0.8 1.7 0.8 3 7 7.3 0.5 +0.1 0.5 102 108 4 8.9 9 3 83 102 106 4.2 6.0
+0.06 0
8 8.8 0.4 0.9 1.7 0.8 3.5 8 8.4 0.5 0 0.6 105 112 4 8.9 9.1 3 86 105 109 4.2 6.0
±0.04 0 108 3 +0.54
9 9.8 0.6 1.1 2.2 0.8 4 9 9.4 0.7 0.6 115 4 8.9 9.5 87 108 112 4.2 6.0
10 10.7 1 1.5 2.8 1.2 4 10 10.4 1.15 0.6 110 117 4 8.9 10.2 3 89 110 114 0 4.2 6.0
11 11.8 ±0.18 1 1.5 3 1.2 4 11 11.4 1.15 0.6 112 119 4 8.9 10.2 3 90 112 116 4.2 6.0
12 13 1 1.7 3.1 1.5 5 12 12.5 1.15 0.8 115 122 4 9.5 10.2 3 94 115 119 4.2 6.0
+0.11 120 127 ±0.65 4 9.5 10.7 3 120 124 4.2 6.0
3 14.1 1 1.7 3.1 1.5 6 13 13.6 1.15 0.9 98
14 15.1 1 1.9 3.6 1.7 6.4 14 14.6 0 1.15 0.9 125 132 4 10 10.7 3.5 103 125 129 4.2 6.0

S CRE W T YPE
±0.09

PL AT E N U TS
15 16.2 1 1.9 3.6 1.7 7.4 15 15.7 1.15 1.1 130 137 4 10 10.7 3.5 108 130 134 4.2 6.0
16 17.3 1 ±0.05 1.9 3.7 1.7 8 16 16.8 1.15 1.2 135 142 4 10.8 11 3.5 113 135 139 4.2 6.0
17 18.3 1 1.9 3.8 1.7 9 17 17.8 1.15 1.2 140 147 4 10.8 11 3.5 118 140 144 4.2 6.0
18 19.5 1 2.4 4 1.7 10 18 19 1.15 1.5 145 152 4 10.8 11 3.5 123 145 149 +0.63 4.2 6.0
+1.26
19 20.5 1 2.5 4 2 11 19 20 1.15 1.5 150 158 4 11.5 11.8 3.5 126 150 155 0 4.2 7.5
- 0.63
20 21.5 1 2.5 4 2 12 20 21 1.15 1.5 155 164 4 11.5 11.8 3.5 130 155 160 4.2 7.5
21 22.5 ±0.2 1 2.5 4.1 2 12 21 22 1.15 1.5 160 169 4 12 12.5 3.5 134 160 165 4.2 7.5
+0.21 +0.2

SPRIN G PINS
22 23.5 1 2.5 4.1 2 13 22 23 1.15 1.5 165 174.5 4 12 12.7 3.5 139 165 170 4.2 7.5
0 0
24 25.9 1.2 2.5 4.3 2 15 24 25.2 1.35 1.8 170 179.5 4 12 — 3.5 145 170 175 4.2 7.5
25 26.9 1.2 3 4.4 2 16 25 26.2 1.35 1.8 175 184.5 4 12.5 — 3.5 149 175 180 4.2 7.5
26 27.9 1.2 3 4.6 2 16 26 27.2 1.35 1.8 180 189.5 4 13 — 4 153 180 185 4.2 7.5
27 29.1 1.2 3 4.6 2 17 27 28.4 1.35 2.1 185 194.5 4 13.5 — 4 157 185 190 4.2 7.5
28 30.1 1.2 3 4.6 2 18 28 29.4 1.35 2.1 190 199.5 4 13.5 — 4 162 190 195 4.2 7.5
+1.44
30 32.1 1.2 ±0.06 3 4.7 2 20 30 31.4 1.35 2.1 195 204.5 4 13.5 — 4 167 195 200 +0.72 4.2 7.5
- 0.72
32 34.4 1.2 3.5 5.2 2.5 21 32 33.7 1.35 +0.14 2.6 200 209.5 4 14 — 4 171 200 205 4.2 7.5
0
34 36.5 ±0.25 1.5 3.5 5.2 2.5 23 34 35.7 1.65 0 2.6 210 222 5 14 — 4 181 210 216 5.2 9.0

S N AP PINS
35 37.8 1.5 3.5 5.2 2.5 24 35 37 1.65 3.0 220 232 5 14 — 4 191 220 226 5.2 9.0
36 38.8 1.5 3.5 5.2 2.5 25 36 38 1.65 3.0 230 242 5 14 — 4 201 230 236 5.2 9.0
+0.25
37 39.8 1.5 3.5 5.2 2.5 26 37 39 1.65 3.0 240 252 5 14 — 4 211 240 246 5.2 9.0
0
38 40.8 1.5 4 5.3 2.5 27 38 40 1.65 3.3 250 262 5 14 — 4 221 250 256 5.2 +0.25 9.0
±0.15
40 43.5 1.75 4 5.7 2.5 28 40 42.5 1.9 3.8 260 275 5 16 — 4 227 260 268 5.2 0 12.0
+1.62
42 45.5 ±0.4 1.75 4 5.8 2.5 30 42 44.5 1.9 3.8 270 285 5 16 — 4 237 270 278 +0.81 5.2 12.0
- 0.81
45 48.5 1.75 4.5 5.9 2.5 33 45 47.5 1.9 3.8 280 295 5 16 — 4 247 280 288 0 5.2 12.0

J OIN T CLIPS
46 49.7 1.75 5 6.1 2.5 33 46 48.5 1.9 3.8 290 305 5 16 — 4 257 290 298 5.2 12.0
47 50.5 1.75 4.5 6.1 2.5 34 47 49.5 1.9 3.8 300 315 5 16 — 4 267 300 308 5.2 12.0
48 51.5 1.75 4.5 6.2 2.5 35 48 50.5 1.9 4.5
50 54.2 2 4.5 6.5 2.5 37 50 53 2.2 4.5 Material = Carbon spring steel - Up to RTW-200
±0.07
52 56.2 2 5.1 6.5 2.5 39 52 55 2.2 4.5 Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
55 59.2 2 5.1 6.5 2.5 41 55 58 2.2 4.5 - RTW-210 or over
56 60.2 ±0.45 2 5.1 6.6 2.5 42 56 59 +0.3 2.2 4.5 Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
58 62.2 2 5.1 6.8 2.5 44 58 61 0 2.2 4.5

AS SEM B LY
60 64.2 2 5.5 6.8 2.5 46 60 63 2.2 4.5

TO O L S
62 66.2 2 5.5 6.9 2.5 48 62 65 2.2 4.5
63 67.2 2 5.5 6.9 2.5 49 63 66 2.2 4.5 Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
65 69.2 2.5 ±0.08 5.5 7 2.5 50 65 68 2.7 4.5

11 12
 RE TAINING RINGS

Basic External Ring STW-3 through 56 Basic External Ring STW- 58 through 300
Applicable shaft
Unit: mm
m
r Retaining rings Groove dimention
b d3 t b a d0 d4 d2 m Ref.n
Size No.

R E TA I N I N G
(Ref.) d1
Basic Tol. Basic Tol. Approx. Approx. Min. Basic Tol. Basic Tol. Min.

RINGS
d3 STW- 58 53.8 2 5.5 7.1 2.5 73 58 55 2.2 4.5
d4 d2 d2 d1 60 55.8 2 5.5 7.2 2.5 75 60 57 2.2 4.5
±0.07
t Size No. r (Max.) 62 57.8 2 5.5 7.2 2.5 77 62 59 2.2 4.5
d0 7 under Acute angle 63 58.8 2 5.5 7.3 2.5 78 63 60 2.2 4.5
a n 7-10 under 0.08
65 60.8 2.5 6.4 7.4 2.5 81 65 62 2.7 4.5
68 63.5 2.5 6.4 7.8 2.5 84 68 65 0 2.7 +0.14 4.5
10-26 under 0.13

PUS H NU TS
70 65.5 ±0.45 2.5 6.4 7.8 2.5 86 70 67 - 0.3 2.7 0 4.5
The dimension d4 is the maximum diameter of 26 or over 0.25
d0 the outer periphery when the retaining ring is set in the shaft. 72 67.5 2.5 ±0.08 7 7.9 2.5 88 72 69 2.7 4.5
(Clearance outer diameter) 75 70.5 2.5 7 7.9 2.5 92 75 72 2.7 4.5
Size No.9 or under Size No.170 or over Unit: mm
78 73.5 2.5 7.4 8.1 2.5 95 78 75 2.7 4.5
Retaining rings Groove dimention 80 74.5 2.5 7.4 8.2 2.5 97 80 76 .5 2.7 5.3
Size No. d3 t b a d0 d4 d2 m Ref.n 82 76.5 2.5 7.4 8.3 3 99 82 78 .5 2.7 5.3
(Ref.) d1
Basic Tol. Basic Tol. Approx. Approx. Min. Basic Tol. Basic Tol. Min. 85 79.5 3 8 8.4 3 103 85 81 .5 3.2 5.3

WAVE WASHERS
STW- 3 2.7 0.25 ±0.025 0.5 1.7 0.7 7 3 2.85 0.35 0.3 88 82.5 3 8 8.6 3 106 88 84 .5 3.2 5.3
+0.04 0

A ND OT HERS
4 3.7 0.4 ±0.03 0.9 2.2 0.8 9 4 3.8 0 0.5 0.3 90 84.5 3 8 8.7 3 108 90 86 .5 - 0.35 3.2 5.3
- 0.15
5 4.7 0.6 1.1 2.4 0.8 10.5 5 4.8 - 0.04 0.7 +0.1 0.3 95 89.5 3 8.6 9.1 3 114 95 91 .5 3.2 5.3
6 5.6 0.7 1.3 2.8 1 12 6 5.7 0.8 0 0.5 100 94.5 3 9 9.5 3 119 100 96.5 3.2 +0.18 5.3
±0.04
7 6.5 +0.06 0.8 1.4 3 1 14 7 6.7 0.9 0.5 105 98 ±0.55 4 9.5 9.8 3 125 105 101 4.2 0 6
0
8 7.4 - 0.2 0.8 1.6 3 1 15 8 7.6 0.9 0.6 110 103 4 9.5 10 3 131 110 106 0 4.2 6
- 0.06
9 8.4 1 1.8 3.2 1 16 9 8.6 1.15 0.6 115 108 4 9.5 10.5 3 137 115 111 - 0.54 4.2 6
10 9.3 1 1.8 3 1.2 17 10 9.6 0
-0.09 1.15 1.5 120 113 4 10.3 10.9 3 143 120 116 4.2 6
±0.15
11 10.2 1 2 3.1 1.2 18 11 10.5 1.15 1.5 125 118 4 10.3 11.3 3.5 148 125 121 4.2 6

S CRE W T YPE
PL AT E N U TS
12 11.1 1 2.1 3.2 1.5 19 12 11.5 1.15 1.5 130 123 4 11 11.5 3.5 154 130 126 4.2 6
13 12 1 ±0.05 2.1 3.3 1.5 20 13 12.4 1.15 1.5 135 128 4 11 11.5 3.5 159 135 131 4.2 6
14 12.9 1 2.2 3.4 1.7 22 14 13.4 1.15 1.5 140 133 4 ±0.09 11 11.8 3.5 164 140 136 4.2 6
0
15 13.8 ± 0.18 1 2.2 3.5 1.7 23 15 14.3 - 0.11 1.15 1.5 145 138 4 11.6 11.8 3.5 170 145 141 4.2 6
16 14.7 1 2.2 3.6 1.7 24 16 15.2 1.15 1.5 150 142 +0.63 4 11.6 12.3 3.5 175 150 145 4.2 7.5
0
17 15.7 1 2.2 3.7 1.7 25 17 16.2 1.15 1.5 155 146 - 1.26 4 12.2 12.7 3.5 181 155 150 - 0.63 4.2 7.5
18 16.5 1.2 2.6 3.8 1.7 26 18 17 1.35 1.5 160 151 4 12.2 12.9 3.5 186 160 155 4.2 +0.2 7.5

SPRIN G PINS
19 17.5 1.2 2.7 3.8 2 27 19 18 1.35 1.5 165 155.5 4 12.9 13.1 3.5 192 165 160 4.2 7.5
0
20 18.5 1.2 2.7 3.9 2 28 20 19 1.35 1.5 170 160.5 4 12.9 — 4 197 170 165 4.2 7.5
21 19.5 1.2 2.7 4 2 30 21 20 1.35 1.5 175 165.5 4 12.9 — 4 202 175 170 4.2 7.5
22 20.5 1.2 2.7 4.1 2 31 22 21 1.35 1.5 180 170.5 4 13.5 — 4 208 180 175 4.2 7.5
23 21.4 1.2 2.9 4.5 2 32.5 23 22 1.35 1.5 185 175.5 4 13.5 — 4 213 185 180 4.2 7.5
24 22.2 1.2 3.1 4.2 2 33 24 22.9 1.35 1.7 190 180.5 4 14 — 4 219 190 185 4.2 7.5
0
25 23.2 ±0.2 1.2 ±0.06 3.1 4.3 2 34 25 23.9 - 0.21 1.35 1.7 195 185.5 4 14 — 4 224 195 190 4.2 7.5
26 24.2 1.2 3.1 4.4 2 35 26 24.9 1.35 +0.14 1.7 200 190.5 4 14 — 4 229 200 195 4.2 7.5
27 25 1.2 3.3 4.5 2 36 27 25.8 1.35 0 1.8 210 198 +0.72 5 14 — 4 239 210 204 0 5.2 9

S N AP PINS
28 25.9 1.5 3.1 4.6 2 38 28 26.6 1.65 2.1 220 208 - 1.44 5 14 — 4 249 220 214 - 0.72 5.2 9
29 26.9 1.5 3.5 4.7 2 39 29 27.6 1.65 2.1 230 218 5 14 — 4 259 230 224 5.2 9
30 27.9 1.5 3.5 4.8 2 40 30 28.6 1.65 2.1 240 228 5 14 — 4 269 240 234 5.2 9
32 29.6 1.5 3.5 5 2.5 43 32 30.3 1.65 2.6 250 238 5 14 — 4 279 250 244 5.2 +0.25 9
±0.15
34 31.5 1.5 4 5.3 2.5 45 34 32.3 1.65 2.6 260 245 5 16 — 4 293 260 252 5.2 0 12
35 32.2 1.5 4 5.4 2.5 46 35 33 1.65 3 270 255 5 16 — 4 303 270 262 5.2 12
±0.25 0
36 33.2 1.75 4 5.4 2.5 47 36 34 1.9 3 280 265 +0.81 5 16 — 4 313 280 272 5.2 12
- 0.81

J OIN T CLIPS
38 35.2 1.75 4.5 5.6 2.5 50 38 36 1.9 3 290 275 - 1.62 5 16 — 4 323 290 282 5.2 12
40 37 1.75 4.5 5.8 2.5 53 40 38 0 1.9 3 300 285 5 16 — 4 333 300 292 5.2 12
42 38.5 1.75 4.5 6.2 2.5 55 42 39.5 - 0.25 1.9 3.8
45 41.5 1.75 4.8 6.3 2.5 58 45 42.5 1.9 3.8 Material = Carbon spring steel - Up to STW200
47 43.4 ±0.4 1.75 ±0.07 5 6.6 2.5 61 47 44.5 1.9 3.8 Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
48 44.5 1.75 4.8 6.5 2.5 62 48 45.5 1.9 3.8 - STW-210 or over
50 45.8 2 5 6.7 2.5 64 50 47 2.2 4.5 Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
52 47.8 2 5 6.8 2.5 66 52 49 2.2 4.5
5

AS SEM B LY
55 50.8 2 7 2.5 70 55 52 0 2.2 4.5
±0.45

TO O L S
56 51.8 2 5 7 2.5 71 56 53 - 0.3 2.2 4.5
Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

13 14
 RE TAINING RINGS

Inverted Internal Ring Inverted External Ring

Groove dimention Applicable shaft
d3 d4
m
b b r
m

R E TA I N I N G
r

RINGS
d2 d5 d1 d 2 d5 d 2 d 2 d1
d4 d3
t n Size No. r (Max.) t Size No. r (Max.)
26 under 0.13 d0 9 under Acute angle
d0 d0 n
26 or over 0.25 9-10 under 0.08
Size No.12 or under 10-26 under 0.13

PUS H NU TS
The dimention d 5 is the minimum diameter of Size No.9 or under The dimention d 5 is the minimum diameter of
the inner periphery when the retaining ring is set in the hole. the inner periphery when the retaining ring is set in the hole. 26 or over 0.25
(Clearance inner diameter) (Clearance inner diameter)
Unit: mm Unit: mm
Retaining rings Groove dimention Retaining rings Groove dimention
Size No. d3 d4 t d5 d2 m n Size No. d3 d4 t d5 d2 m n
b d0 Tol. d1 b d0 Tol. d1
Basic Tol. (Ref.) Basic Tol. Basic Tol. Basic Tol. Min. Basic Tol. (Ref.) Basic Tol. Basic Tol. Basic Tol. Min.

WAVE WASHERS
IRTW-10 11.1 7.7 1 1.7 0.9 5.9 10 10.4 1.15 1.5 ISTW- 6 5.6 8 0.5 ±0.03 1.2 2.2 8.9 6 5.7 0
- 0.04 0.6 1.5

A ND OT HERS
+0.1
11 12.2 8.6 1 1.8 0.9 6.6 11 11.4 1.15 1.5 7 6.5 +0.1 9.3 0.6 1.4 2.6 10 7 6.7 0.7 1.5
±0.2 0 0
12 13.3 9.7 1 1.8 0.9 7.6 12 12.5 1.15 1.5 8 7.4 - 0.2 10.6 0.7 ±0.04 1.6 3 12 8 7.6 0.8 1.5
- 0.06
13 14.1 ±0.18 10.9 1 1.6 0.9 9 13 13.6 +0.11 1.15 1.5 9 8.4 12 0.8 1.8 3.4 13 9 8.6 0.95 1.5
14 15.1 11.7 1 1.7 0.9 9.8 14 14.6 0 1.15 1.5 10 9.3 13.3 1 2 1.2 15 10 9.6 0
- 0.09 1.15 1.5
±0.15
15 16.2 12.6 1 1.8 0.9 ±0.3 10.6 15 15.7 1.15 1.5 11 10.2 14.4 1 2.1 1.2 16 11 10.5 1.15 1.5
16 17.3 13.5 1 ±0.05 1.9 0.9 11.4 16 16.8 1.15 1.5 12 11.1 15.5 1 2.2 1.2 17 12 11.5 1.15 1.5
17 18.3 14.3 1 2 0.9 12.2 17 17.8 1.15 1.5 13 12 16.6 1 2.3 1.2 18 13 12.4 1.15 1.5
±0.05
18 19.5 15.3 1 2.1 1 13 18 19 1.15 1.5 14 12.9 17.5 1 2.3 1.2 19 14 13.4 0 1.15 1.5

S CRE W T YPE
PL AT E N U TS
19 20.5 16.1 1 2.2 1 13.8 19 20 1.15 1.5 15 13.8 18.6 1 2.4 1.2 ±0.3 21 15 14.3 - 0.11 1.15 1.5
±0.18
20 21.5 16.9 1 2.3 1 14.5 20 21 1.15 1.5 16 14.7 19.7 1 2.5 1.2 22 16 15.2 1.15 1.5
21 22.5 ±0.2 17.7 1 2.4 1.2 15 21 22 1.15 1.5 17 15.7 20.9 1 2.6 1.2 23 17 16.2 1.15 1.5
+0.21
22 23.5 18.7 1 2.4 1.2 16 22 23 1.15 1.5 18 16.5 21.9 1.2 2.7 1.5 24 18 17 1.35 1.5
0
24 25.9 20.7 1.2 2.6 1.2 17.5 24 25.2 1.35 1.8 19 17.5 23.1 1.2 2.8 1.5 25 19 18 1.35 1.5
25 26.9 21.5 1.2 2.7 1.2 18.5 25 26.2 1.35 1.8 20 18.5 24.3 1.2 2.9 1.5 27 20 19 1.35 1.5
26 27.9 22.3 1.2 2.8 1.2 19 26 27.2 1.35 1.8 21 19.5 25.5 1.2 3 1.5 28 21 20 1.35 1.5

SPRIN G PINS
28 30.1 24.1 1.2 3 1.2 20.5 28 29.4 1.35 2.1 22 20.5 26.5 1.2 3 1.5 29 22 21 1.35 1.5
30 32.1 25.7 1.2 3.2 1.4 ±0.4 22.5 30 31.4 1.35 2.1 24 22.2 28.6 1.2 3.2 1.5 32 24 22.9 0 1.35 1.7
32 34.4 27.4 1.2 ±0.06 3.5 1.6 23.5 32 33.7 1.35 2.55 25 23.2 ±0.2 29.8 1.2 ±0.06 3.3 1.5 33 25 23.9 - 0.21 1.35 1.7
34 36.5 ±0.25 29.1 1.5 3.7 1.6 25 34 35.7 1.65 2.55 26 24.2 31 1.2 3.4 1.5 34 26 24.9 1.35 1.7
35 37.8 30 1.5 3.9 1.6 26 35 37 1.65 +0.14 3 28 25.9 33.1 1.5 3.6 1.8 37 28 26.6 1.65 2.1
36 38.8 30.8 1.5 4 1.6 26.5 36 38 1.65 0 3 30 27.9 35.3 1.5 3.7 1.8 ±0.4 39 30 28.6 1.65 +0.14 2.1
37 39.8 31.6 1.5 4.1 1.6 37 +0.25 32 29.6 37.4 1.5 3.9 1.8 41 32 30.3 1.65 0 2.6
27.5 39 1.65 3
38 40.8 32.4 1.5 4.2 1.6 28 38 40 0 1.65 3 34 31.5 39.7 1.5 4.1 1.8 44 34 32.3 1.65 2.6
40 43.5 34.7 1.75 4.4 2 30 40 42.5 1.9 3.75 35 32.2 40.6 1.5 4.2 1.8 45 35 33 1.65 3

S N AP PINS
±0.25
42 45.5 ±0.4 36.3 1.75 4.6 2 31 42 44.5 1.9 3.75 36 33.2 41.6 1.75 4.2 2 46 36 34 1.9 3
45 48.5 38.9 1.75 4.8 2 33 45 47.5 1.9 3.75 38 35.2 44 1.75 4.4 2 48 38 36 1.9 3
0
47 50.5 40.7 1.75 4.9 2 35 47 49.5 1.9 3.75 40 37 46.2 1.75 4.6 2 51 40 38 1.9 3
- 0.25
48 51.5 41.5 1.75 5 2 36 48 50.5 1.9 3.75 42 38.5 48.1 1.75 4.8 2 54 42 39.5 1.9 3.8
50 54.2 44 2 ±0.07 5.1 2.2 38 50 53 2.2 4.5 45 41.5 51.3 1.75 4.9 2 57 45 42.5 1.9 3.8
±0.4
52 56.2 45.8 2 5.2 2.2 40 52 55 2.2 4.5 48 44.5 55.1 1.75 5.3 2 61 48 45.5 1.9 3.8
55 59.2 48 2 5.6 2.2 ±0.5 42 55 58 2.2 4.5 50 45.8 56.8 2 ±0.07 5.5 2.5 63 50 47 2.2 4.5

J OIN T CLIPS
56 60.2 48.8 2 5.7 2.5 43 56 59 2.2 4.5 52 47.8 59 2 5.6 2.5 65 52 49 2.2 4.5
58 62.2 ±0.45 50.4 2 5.9 2.5 44 58 61 +0.3 2.2 4.5 55 50.8 62.6 2 5.9 2.5 ±0.5 69 55 52 2.2 4.5
60 64.2 52 2 6.1 2.5 46 60 63 0 2.2 4.5 58 53.8 66 2 6.1 2.5 72 58 55 2.2 4.5
62 66.2 53.6 2 6.3 2.8 47 62 65 2.2 4.5 60 55.8 68.4 2 6.3 2.5 75 60 57 2.2 4.5
65 69.2 55.8 2.5 6.7 3.2 49 65 68 2.7 4.5 62 57.8 70.8 2 6.5 2.5 77 62 59 2.2 4.5
68 72.5 58.5 2.5 7 3.2 52 68 71 2.7 4.5 63 58.8 ±0.45 72 2 6.6 2.5 78 63 60 0 2.2 4.5
72 76.5 61.7 2.5 7.4 3.2 55 72 75 2.7 4.5 65 60.8 74.4 2.5 6.8 3 81 65 62 - 0.3 2.7 4.5
±0.08
75 79.5 63.9 2.5 7.8 3.2 57 75 78 2.7 4.5 68 63.5 77.5 2.5 7 3 84 68 65 2.7 4.5
4.5 ±0.08 7.2

AS SEM B LY
78 82.5 66.3 2.5 8.1 3.2 59 78 81 2.7 70 65.5 79.9 2.5 3 87 70 67 2.7 4.5

TO O L S
80 85.5 68.9 2.5 8.3 3.2 ±0.7 61 80 83.5 2.7 5.25 75 70.5 85.7 2.5 7.6 3 92 75 72 2.7 4.5
+0.35 ±0.7
85 90.5 ±0.55 72.7 3 8.9 4 64 85 88.5 3.2 5.25 80 74.5 90.5 2.5 8 3 98 80 76.5 2.7 5.3
0 +0.18
90 95.5 76.7 3 ±0.09 9.4 4 68 90 93.5 3.2 5.25
100 0 5.25 Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
105.5 84.5 3 10.5 4 76 100 103.5 3.2

Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)

1. Size Nos. IRTW-56 or over are available on a production by order basis. 1. Size Nos. IRTW-56 or over are available on a production by order basis.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability. 2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

15 16
 RE TAINING RINGS

Beveled Internal Ring

Fig. 1 Fig. 2
See Fig.2 d1 d2 - d6 Shape of Lug u m

R E TA I N I N G
b

RINGS
Ch (Max.)
d2 d1
t
R (Max.) n Size No. r (Max.)
d0 t
52 under 0.13
a
d3 d6 Type A Type B 52 or over 0.25
d4 d5 (Symmetrical) (Asymmetrical)

PUS H NU TS
Basic Basic
15° 15°
Unit: mm Unit: mm
Retaining rings Groove dimention Data
Size No. d3 t u Shape d2 m Clearance diameter
a b d0 of Lug d1 d6 Maximum allowable corner radii
Basic Tol. Basic Tol. Basic Tol. Basic Tol. Basic Tol. Size No. When sprung into d 2 and chamfers of retained parts Take-up n
When sprung into d1 (Fig. 1)
(d 6/2) (End-play Take-up) (Min.)

WAVE WASHERS
- 26 28.9 + 0.4
- 0.25 1 ±0.05 0.84 ±0.025 4 2.7 1.5 B 26 28 + 0.08
0 0.9 1

A ND OT HERS
28 31.1 1.3 1.02 4.6 2.95 1.9 B 28 30.1 1.1 1.05 d4 d5 R (Max.) Ch (Max.)
+0.65 +0.1 +0.1
30 33.4 1.3 ±0.06 1.02 4.6 3.05 1.9 B 30 32.1 1.1 1.05 - 26 17.4 18.4 1 0.8 0.13 1.6
0 0
32 35.35 - 0.5 1.3 0.99 4.6 3.15 1.9 A 32 34.3 1.1 1.15 28 18.2 19.2 1 0.8 0.14 1.6
35 38.75 1.3 0.97 ±0.03 4.6 3.3 1.9 B 35 37.5 1.1 1.25 30 20 21 1 0.8 0.14 1.7
40 44.25 1.6 1.22 5.1 4 1.9 B 40 42.8 1.3 1.4 32 22 23.1 1 0.8 0.15 1.9
+0.9 ±0.08 1.19 +0.13 35 25 26.2 1 0.8 0.16 2.1
42 46.6 1.6 5.75 4.25 1.93 A 42 45 1.3 1.5
- 0.65 0 +0.15 40 29.2 30.4 1.6 1.3 0.18 2.3
47 52.15 1.6 1.17 5.94 4.3 2.31 B 47 50.4 1.3 1.7
0 42 29.7 30.9 1.6 1.3 0.2 2.6
52 57.9 +1
2 1.52 ±0.04 6.4 4.7 2.3 B 52 55.7 +0.15 1.6 1.85

S CRE W T YPE
47 34.3 36 1.6 1.3

PL AT E N U TS
- 0.75
±0.07 0.22 2.8
80 89.1 ±1.4 2.77 2.1 ±0.06 7.9 6.65 3.2 A 80 85.9 0 2.3 2.95 52 38.6 40.3 2 1.6 0.24 3.1
80 63 66 2.5 2 0.39 4.4
Material = Carbon spring steel Hardness = 44 through 52HRC, Finish = Phosphate coating (ACP)

Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

SPRIN G PINS
Beveled External Ring
See Fig.2 d2 + d6
Fig. 1 Fig. 2
d1 Shape of Lug
Basic

S N AP PINS
15° Basic
b
t 15°
r
d1 d2 Ch (Max.)
t R (Max.)
Size No. r (Max.)
a n 52 under 0.13
d0 d6 Type A Type B u
d3

J OIN T CLIPS
d4 d5 (Symmetrical) (Asymmetrical) m 52 or over 0.25

Unit: mm Unit: mm
Retaining rings Applicable shaft Data
d3 t u Shape d2 m Clearance diameter
Size No. Maximum allowable corner radii
a b d0 of Lug d1 d6
Basic Tol. Basic Tol. Basic Tol. Basic Tol. Basic Tol. Size No. When sprung into d1 When sprung into d 2 and chamfers of retained parts Take-up n
(d 6/2) (Fig. 1) (End-play Take-up) (Min.)
N - 30 27.9 +0.25 1.3 1.04 4.9 3.3 1.9 B 30 28.15 1.1 0.93

AS SEM B LY
±0.06 0 +0.1

TO O L S
35 32.3 - 0.4 1.3 0.99 ±0.03 4.6 3.9 1.9 B 35 32.55 - 0.1 1.1 0 1.23 d4 d5 R (Max.) Ch (Max.)
50 46.2 +- 0.5
0.35
1.6 ±0.08 1.19 6.2 5.1 3.12 B 50 46.8 0 1.3 +0.15 1.6
N - 30 40.8 39.8 1.6 1 0.12 1.6
60 + 0.35
55.8 - 0.65 2 1.52 ±0.04 6.75 5.7 3.12 A 60 56.2 - 0.15 1.7 0 1.9
35 45.9 44.6 1.8 1.1 0.16 1.8
50 64.4 63.0 2 1.2 0.21 2.6
Material = Carbon spring steel Hardness = 44 through 52HRC, Finish = Phosphate coating (ACP)
60 76.3 74.7 2.5 1.5 0.25 3.1

Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

17 18
 RE TAINING RINGS

E-Ring Bowed E-Ring

Applicable shaft
Applicable shaft Stacked (ES) r d2 r
d t
H
m n

R E TA I N I N G
RINGS
d d 2 d1
d2 d1 Size No. r (Max.)
Size No. r (Max.)
7 under 0.13
1.5 under Acute angle
7-12 under 0.25
The stack contains retaining rings arrayed 1.5-7 under 0.13 V
in the shape of a rod. D m 12 or over 0.38
m 7-12 under 0.25
D t ES-1 or below are railed stacks while stacks
n

PUS H NU TS
ES-2 through 12 are taped stacks.
12 or over 0.38 X
To order a stack, specify ES-3 for example. Unit: mm
Retaining rings Applicable shaft
Unit: mm
Size No. t V d1 d2 m X n
d D
Retaining rings Applicable shaft Basic Tol. Min. Max. Basic Tol. Basic Tol. Min. Max. Min.
Size No. d D H t Class of d1 d2 m n BETW- 1.5 1.5 4 0.4 0.8 +0.15 2 2.5 1.53 0.8 0.55 0.65 0.8
2 2 5 0.4 0.8 - 0.1 2.5 3.2 2.05 +0.06 0.8 0.55 0.65 1
Basic Tol. Basic Tol. Basic Tol. Basic Tol. Or over Under Basic Tol. Basic Tol. Min.
2.5 2.5 6 0.4 0.8 3.2 4 2.55 0 0.8 0.55 0.65 1

WAVE WASHERS
ETW- 0.6 0.6 ±0.02 1.5 0.45 ±0.02 0.2 0.8 1 0.65 0.3 0.4 3 3 7 0.6 1.1 4 5 3.05 1.1 0.85 1 1

A ND OT HERS
0.7 0.67 2 0
0.9 +0.05 0.3 +0.25
0 0.55 -0.1 0.2 1.2 0.7 0.4 4 4 9 0.6 1.1 5 7 4.05 1.1 0.85 1 1.2
- 0.08 ±0.1 ±0.02 0 0 +0.075 +0.1
0.8 0.8 2 0.7 0.2 1 1.4 0.82 0.3 0.4 5 5 11 0.6 1.1 6 8 5.05 1.1 0.85 1 1.2
0 0
1 0.98 2.8 0.88 0.2 1.3 1.7 1 0.3 0.5 6 6 12 0.8 1.3 7 9 6.05 1.3 1 1.2 1.2
+0.05 7 7 14 0.8 1.3 8 11 7.1 1.3 1 1.2 1.5
1.2 1.2 3 1 0.3 ±0.025 1.4 2 1.23 0.4 0.6
0 8 8 16 0.8 1.3 9 12 8.1 +0.09 1.3 1 1.2 1.8
1.5 1.5 4 1.3 0 0.4 2 2.5 1.53 0.5 0.8 +0.4
9 9 18 0.8 1.3 10 14 9.1 0 1.3 1 1.2 2
1.9 1.9 0 4.5 1.7 - 0.25 0.4 2.5 3 1.93 0.5 1 0
±0.03 +0.06 10 10 20 1 1.7 11 15 10.15 1.7 1.3 1.6 2
2 2 - 0.09 5 1.7 0.4 2.5 3.2 2.05 0.5 1
0 12 12 23 1 1.7 13 18 12.15 +0.11 1.7 1.3 1.6 2.5
2.3 2.3 6 2 0.4 3 4 2.35 0.5 1

S CRE W T YPE
+ 0.6
15 15 29 1.5 2.3 16 24 15.15 0 2.3 1.8 2.2 3

PL AT E N U TS
0
2.5 2.5 6 2.1 0.4 3.2 4 2.55 0.5 1
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish =Zinc Plate plus Chromate
3 3 7 2.6 0.6 4 5 3.05 0.7 1
3.2 3.2 7 ±0.2 2.8 0.6 4 5 3.25 0.7 1.2
4 4 0 9 3.5 0 0.6 5 7 4.05 +0.075 0.7 1.2 Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
5 5 - 0.12 11 4.3 - 0.3 0.6 ±0.04 6 8 5.05 0 0.7 +0.1 1.2
6 6 12 5.2 0.8 7 9 6.05 0.9 0 1.2
7 7 14 6.1 0.8 8 11 7.1 0.9 1.5
C -Ring

SPRIN G PINS
8 8 0 16 6.9 0 0.8 9 12 8.1 +0.09 0.9 1.8
9 9 - 0.15 18 7.8 - 0.35 0.8 10 14 9.1 0 0.9 2
10 10 20 8.7 1 11 15 10.15 1.15 2
±0.05
12 12 0 23 10.4 1 13 18 12.15 +0.11 1.15 +0.14 2.5
±0.3 0 Applicable shaft
15 15 - 0.18 29 13 1.5 16 24 15.15 0 1.65 3 r
- 0.45 ±0.06 0
19 19 0 37 16.5 1.5 20 31 19.15 +0.13 1.65 3.5
24 24 - 0.21 44 20.8 0
-0.5 2 ±0.07 25 38 24.15 0 2.2 4

Material = Carbon spring steel Hardness = 44 through 53HRC, Finish =Zinc Plate plus Chromate Phosphate coating (ACP) d

S N AP PINS
Material = Stainless steel for spring d 2 d1 r (Max.)
Size No.
12-43 0.13
b 46-81 0.25
1. ETW is bulk in small bags, ES is stacked.
t
2. The stack packages for the E Ring include 3 types of stacks according to the size and material. D d2
n m
1 ) The package for ES-0.6 to ES-1 is stacked in a rail. Unit: mm
2 ) The package for ES-1.2 to ES-12 is stacked with paper tape.

J OIN T CLIPS
3 ) The stainless package consists of rings of up to 10 dia. stacked with vinyl tape. Retaining rings Applicable shaft
4 ) When requesting stack products, specify them.
Size No. d t d1 d2 m n
D b
Basic Tol. Basic Tol. Basic Tol. Basic Tol. Min.
3. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
5103- 12 2.59 +0.05 4.17 0.79 0.4 ±0.03 3.2 2.69 ±0.04 0.48 +0.04 0.8
18 4.09 - 0.1 6.19 1.05 0.4 4.8 4.19 0.48 0 0.9
21 4.75 6.99 1.12 0.6 5.6 4.9 0.7 1.1
25 5.36 7.9 1.27 0.6 6.4 5.59 0.7 1.2
31 6.86 +0.07 9.56 1.35 0.6 7.9 7.01 ±0.05 0.7 +0.06 1.3
37 8.33 11.37 1.52 0.6 ±0.04 9.5 8.51 0.7 1.5
- 0.13 0
40 9.12 12.32 1.6 0.6 10.3 9.25 0.7 1.6

AS SEM B LY
43 9.8 13.1 1.65 0.6 11.1 9.98 0.7 1.7

TO O L S
46 10.54 14 1.73 0.6 11.9 10.69 0.7 1.8
50 11.2 14.76 1.78 0.9 ±0.05 12.7 11.43 ±0.07 1 1.9
±0.15 +0.08
56 12.62 16.56 1.98 0.9 14.3 12.88 1 0 2.1
81 18.31 ±0.18 23.23 2.46 1.4 ±0.06 20.6 18.59 1.5 3
Material = Carbon spring steel Hardness = 44 through 52HRC, Finish =Zinc Plate plus Chromate

1. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
2. When requesting stack products, specify them. 5103-81 available only as a bulk package

19 20
 RE TAINING RINGS

U-Ring 3 PUSH NUTS

Applicable shaft
C
r

RE TAININ G
RIN GS
d
d2 d1
A
B ( 1 ) Self-locking External Nut ( 2 ) Self-locking Internal Nut Characteristics
r (Max.): 0.13 By fitting the Self-locking Nuts on the shaft
t (groove) in the thrust direction that is parallel with

PU S H N U T S
D d2 n m
the shaft (groove), their prongs bite into the
retained part so as to prevent dropping off.
Unit: mm
Retaining rings Applicable shaft
There is no need of machining a groove and the
Size No. d C t Class of d1 d2 m n Nuts can be freely positioned and fixed.
A D B
Basic Tol. Basic Tol. Basic Tol. Or over Under Basic Tol. Basic Tol. (Min.) The product is structured so that its prongs bite

WAVE WASHERS
A ND OT HERS
UTW- 3.2 3.2 8.7 8 2.8 4.6 0.6 4 5 3.26 0.7 1
4 4
+0.03
10 9 3.6
0
5.3 0.7 5 7 4.08
+0.05
0.8 1.4
into the shaft.
- 0.1 - 0.2 ±0.04 0 +0.1
5 5 12.8 11.6 4.4 6.8 0.7 6 8 5.1 0.8 1.4
0
6 6 +0.05 14.8 13.5 5.3 8 0.7 7 9 6.1 0.8 1.4
0 +0.08
7 7 - 0.15 17 15 6.2
- 0.3
9 0.9 ±0.05 8 11 7.1 0 1 1.4 ( 3 ) Circular External Nut ( 4 ) Circular Internal Nut Characteristics
+ 0.05
8 8 - 0.2 19.5 17.5 7.1 10.5 1 9 12 8.1 1.1 1.4
The Circular Nuts have lower fitting force and are
Material = Carbon spring steel Hardness = 44 through 52HRC, Finish = Phosphate coating (ACP)
profiled to be less prone to damage the shaft than

S CRE W T YPE
PL AT E N U TS
the Self-locking Nuts.
1. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
The Circular Nuts have smaller outside diameters
2. It will be packaged in small bags or stack packaging.
than the Self-locking Nuts.
These nuts have smaller thrust loads than the
Self-locking Nuts.

SPRIN G PINS
( 5 ) Circular Push-on Nut Characteristics
The thrust load is between that of the Self-locking
Nuts and that of the Circular External Nut.
There is no need of taking care of misalignment

S N AP PINS
during fitting since the Nut has longer prongs than
the Circular External Nut.
External product only.

( 6 ) P-Type Push-on Nut

J OIN T CLIPS
Characteristics
The spring action is given by curving the whole nut
on an arched line. The retained part can be
fastened with the Nut pushed in (without
looseness).
External product only.

AS SEM B LY
TO O L S
( 7 ) Cap Nut F-Type Characteristics
The Nut avoids snag issues (scratches and injury)
on the axial end face by protecting the end face of
the retained shaft.
Used for decoration.
21 22
 PUSH NUTS

Self-locking External Nut

Applicable shaft

( 8 ) Cap Nut D-Type Characteristics

The Nut avoids snag issues (scratches and injury) on the axial end

RE TAININ G
RIN GS
face by protecting the end face of the retained shaft.
D S
Used for decoration.
Combined product of the Self-locking Nuts and the Cap Nuts. d
(Inscribed circle) t
H

PU S H N U T S
Unit: mm

( 9 ) Flat Push Nut Characteristics Nuts Applicable shaft

Size No. d H S
Unlike push nuts, Circular External Nut, and Circular Push-on Nut, this Basic Tol.
D
(Ref.)
t
Basic Tol.
type of retaining ring does not have bent tabs, making it easy to use SPN- 1.2 1.1
0
4.5 0.8 0.25 1.2
1.5 1.4 5.2 0.8 0.25 1.5
without distinguishing between the front and back, and facilitating 2 1.9
- 0.1
6 0.8 0.25 2
+0.04
- 0.03
automation.

WAVE WASHERS
2.4 2.3 7 0.85 0.25 2.4

A ND OT HERS
2.6 2.5 7 0.85 0.25 2.6
The thrust load falls between that of push nuts and Circular External 3 2.9 10 1.15 0.3 3 +0.05
Nut. 4 3.9 0 12 1.3 0.3 4
- 0.03
5 4.9 - 0.15 14 1.5 0.4 5
It includes guides to prevent misalignment during insertion. 6 5.9 16 1.75 0.4 6 +0.06
8 7.9 17.5 1.4 0.5 8 - 0.03
External product only. 10 9.9 21 1.8 0.7 10 +0.07
12 11.9 27 2.45 0.9 12 - 0.03

S CRE W T YPE
PL AT E N U TS
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
Material = Stainless steel for spring

1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
Instructions for Use chrome plating has been applied to the surface.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
( 1) If the retained part is rigid in hardness or applied with such surface treatment as produces a hard coating

SPRIN G PINS
(nickel plating, chrome plating), there is no difference in hardness between the retaining ring and the
retained part. Then the prongs will not bite into the retained part causing the thrust load to be reduced.
( 2 ) The purpose is to prevent dropping off of retained parts. And the parts are not pressurized (no force to
continuously push on them). However, for the P-Type Push-on Nut, force to push on the retained part will Self-locking Internal Nut
be produced.
( 3 ) For repairing and maintenance of the retained part, the product cannot be reused since it is removed as Groove dimention

S N AP PINS
deformed (destroyed) from the part.
( 4 ) When fitting the product on the retained part, install it with care to prevent the fitting jig from being caught. d
Otherwise, the retained part may not be allowed to be fixed due to deformed prongs. (Except for the Grip
Ring) Be sure to verify the conditions by using the actual machine.
S
( 5 ) When fitting the product on the retained part, do not install it obliquely. The thrust load (drop off force) may
be reduced as compared to the case where the product is correctly installed.

J OIN T CLIPS
( 6 ) Never insert your finger(s) into any of the external products. The product will not slip off from your finger(s) H
and this is very dangerous. D
(Circumscribed circle)
Unit: mm
Nuts Groove dimention
Size No. D H S
d t
Basic Tol. (Ref.) Basic Tol.

AS SEM B LY
RPN- 6 6.2 1 1 0.3 6 +0.03

TO O L S
8 8.2 ±0.1 1.8 1.2 0.3 8 - 0.06
+ 0.03
10 10.2 3 1.4 0.4 10 - 0.07

Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)

1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
chrome plating has been applied to the surface.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

23 24
 PUSH NUTS

Circular External Nut Circular Push-on Nut

Applicable shaft
Applicable shaft

d n
d

RE TAININ G
S

RIN GS
t
D Unit: mm
Retaining rings Applicable shaft
Size No. d D Number of S t

PU S H N U T S
t teeth D
Basic Tol. Basic Tol. Basic Tol.
CSTW- 2 1.9 ±0.05 6 0.25 3 2 +0.03 Unit: mm
0
2.4 2.2 +0.1 6.4 0.25 3 2.4 Nuts Applicable shaft
3 2.8 0 8 0.25 4 3 Size No. d D S n
3.5 3.3 0
7.5 0.25 4 3.5 t
- 0.1
Basic Tol. Basic Tol. Basic Tol. Min.
4 3.8 9 ±0.2 0.25 4 4 CSN- 3 2.7 12 0.3 3 4.8
4.5 4.3 10 0.25 5 4.5

WAVE WASHERS
±0.03 4 3.7 ±0.2 12 ±0.3 0.3 4 ±0.05 6

A ND OT HERS
5 4.8 10 0.25 5 5 5 4.7 14 0.4 5 6.6
6 5.8 11 0.25 5 6
8 7.8 +0.1 13 0.25 5 8 Material = Stainless steel for spring
10 9.8 0 15.4 0.25 6 10
12 11.8 17.8 0.4 6 12
1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
14 13.8 20.3 0.4 6 14
±0.3 chrome plating has been applied to the surface.
16 15.8 22.8 0.4 6 16 ±0.05 2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
18 17.8 25 0.4 8 18

S CRE W T YPE
PL AT E N U TS
20 19.8 28 0.4 8 20
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)

P-Type Push-on Nut

Material = Stainless steel for spring

1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
chrome plating has been applied to the surface.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
Stud diameter

SPRIN G PINS
D2
h
d
Circular Internal Nut Panel
Nut
Stud
Groove dimention
D1 S2 S1

S N AP PINS
t t B
D C

Unit: mm
Nuts Stud diameter
d Size No. d h S1

J OIN T CLIPS
Unit: mm D1 D2 Tol. t S2 B C
Basic Tol. Basic Tol. Basic Tol.
Retaining rings Groove dimention PSN- 1.2 1.1 12 6 0.95 0.3 1.3 1 4.5 6
Size No. D d Number of S 1.5 1.38 12 6 0.95 0.3 1.57 1.2 4.5 6
t ±0.1 ±0.15
Basic Tol. Basic Tol. teeth Basic Tol. 1.8 1.68 12 6 1.05 0.4 1.87 1.5 4.5 6
CRTW- 6 6.2 2.2 0.25 6 2 1.85 12 6 1 0.4 2.07 1.6 4.5 6
6 ±0.25 ±0.05
3 2.8 14 8 1.2 0.4 3.1 2.6 6 8
8 8.2 3.6 0.25 6 8
4 3.8 16 9 1.5 0.4 4.1 3.6 6 8
10 10.2 5 0.25 6 10 +0.2 ±0.25
0 5 4.8 18 11 1.6 0.4 5.1 4.6 6 8
12 12.2 6.6 ±0.2 0.25 6 12 ±0.03 6 5.8 - 0.1 20 12 1.7 0.4 6.1 5.6 8 10
- 0.1

AS SEM B LY
14 14.2 8.2 0.25 6 14 8 7.8 23 15 2.2 0.5 8.1 7.6 8 10

TO O L S
16 16.2 9.8 0.25 6 16
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish =Zinc Plate plus Chromate
18 18.2 11 0.4 8 18
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
Material = Stainless steel for spring 1. The marked Size-Nos. of nuts are manufactured on request.
2. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
chrome plating has been applied to the surface.
1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
3. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
chrome plating has been applied to the surface.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

25 26
 PUSH NUTS

Cap Nut F-Type Flat Push Nut

Applicable shaft Metal Plastics
G (Guide
hole diameter)

RE TAININ G
10 °

RIN GS
45°

D2 S1 S2 S1 S2

t n1
0.25

PU S H N U T S
D1 H n2 D

Unit: mm Unit: mm
Nuts Applicable shaft Flat Push Nut Applicable stud Note 2
Size No. D1 D2 H S n1 n2 Size No. d D G Number Metal & Plastics
t (Min.) (Max.)
Basic Tol. Basic Basic Tol. Basic Tol. Basic Tol. Basic Tol. Basic Tol. of teeth S1 S2 L
WS- 5 11.5 6 5 0.4 5 3 4 FSPN- 2 1.6 7 2.2 3 2 1.5

WAVE WASHERS
+0.1

A ND OT HERS
6 12 ±0.2 7.1 5 ±0.3 0.45 6 ±0.05 3 4 3 2.6 8 3.2 3 3 - 0.03 2
±0.05 ±0.2 ±0.05 Approx.3
8 14.3 9.3 7.3 0.5 8 3 6 4 3.6 9 4.2 4 4 +0.1 Note 3
3
5 4.6 10 5.2 5 5 0 4
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Nickel plating
Material = Carbon spring steel

1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
chrome plating has been applied to the surface. 1. Type of packing: Stack (500 pieces per stack)

S CRE W T YPE
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability. 2. A preferable hardness for metal shafts is 200HV or lower. When rigid shafts are to be applied, consult with us.

PL AT E N U TS
3. The tolerance value in parentheses is for plastic material.
4. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

Cap Nut D-Type

SPRIN G PINS
Applicable shaft
n2
H n1

S N AP PINS
d
D S

Cap
Nuts

J OIN T CLIPS
Unit: mm
Nuts Applicable shaft
Size No. d D H Plate Plate S n1 n2
hickness thicknes (Min.) (Max.)
Basic Tol. Basic Tol. Basic Tol. of cap of nut Basic Tol.
DS- 5 4.9 13 5.5 0.3 0.3 5 2.5 4
0 +0.05
6 5.9 15 ±0.3 5.5 ±0.3 0.3 0.3 6 2.5 4
- 0.15 - 0.03
8 7.9 15.6 5.5 0.3 0.3 8 2.5 4

AS SEM B LY
TO O L S
Raw material of cap = Stainless steel (SUS304-CS)
Raw material of nut = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)

1. Please note that it may not be usable when the hardness of the mating shaft is high or when a hard coating such as nickel plating or
chrome plating has been applied to the surface.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

27 28
 4 WAVE WASHERS AND OTHERS

RE TAININ G
RIN GS
Common Characteristics
Provide for load capacity requirements in smaller space than coiled spring types. 1
Provide locking of screws and can suppress abnormal sound, looseness and unsteadiness by pressurizing

PUS H NU TS
retained parts at specific levels.
Absorption of vibrations where dynamic load is applied. Fig. 1 Wave Washer
For Wave Washers and Dish Springs, different spring characteristics can be obtained by combining
(stacking) them in the same direction and/or in the face-to-face direction.

TYPE

WAV E WA S H E R S
A N D OT H E R S
Characteristics
t
Load is introduced by bending and flexing a flat washer on a waved shape. The d
waves are available from 2. D

This type provides higher load than the Curved Washer.

Load

S CRE W T YPE
PL AT E N U TS
16Ebt 3N 4 P: Load ( N )
P= (1)
TYPE

2 S: Stress ( N/mm2 )
3 Dm 3 D: Diameter of outer periphery ( mm)
Characteristics
Provide for load capacity requirements in smaller space than coiled spring d: Diameter of inner periphery ( mm)
Stress

SPRIN G PINS
types.
Dm :
0.75 PDm Average diameter ( mm) [= ( D + d ) /2 ]
=
Provide locking of screws and can suppress abnormal sound, looseness and
unsteadiness by pressurizing retained parts at specific levels. S (2) b: Rim width ( mm) [= ( D - d ) /2 ]
Absorption of vibrations where dynamic load is applied.
For Curved and Dish Springs, different spring characteristics can be obtained
bt 2 N 2 t: Plate thickness ( mm)
by combining (stacking) them in the same direction and/or in the face-to-face N: Wave number
Table 1 Longitudinal elastic modulus of main materials ( E )
direction. : Amount of deflection ( mm)

S N AP PINS
TYPE Material Longitudinal elastic modulus ( N/mm2 ) E : Longitudinal elastic modulus
3 Carbon spring steel 206000 ( N/mm2 ) ( Table 1 )
Characteristics Stainless steel for spring 181000 : Circumference ratio
Load is introduced by bending and flexing a flat washer on a circular (arched)

J OIN T CLIPS
shape.
TYPE
Reference for design
4 To change the load Please adjust the plate thickness and wave number. The load is proportional to the cube when
Characteristics by a large amount adjusting the plate thickness, and to the fourth power when adjusting the wave number.
(However, as the number of waves increases, it becomes easier to settle, so please consider
Load is introduced by bending and flexing a flat washer on a conical (dish) shape. the basic three waves.)
Higher load can be acquired by smaller deflection.

AS SEM B LY
To change the load Adjust the diameters of inner and outer peripheries (rim width). The load is proportional to the

TO O L S
Although this type provides higher load than the Curved and Wave Washers, the by a small amount rim width.
resultant load has larger variations because of larger load rate.
Notes
Instructions for Use
There are differences between the calculated and measured values for the formula of deflection and load. Substitution of
Where total compression is accomplished in the assembly process, settling may occur causing a difference between the conditions such as diameters of outer and inner peripheries gives a first-order equation of deflection and load which is
initial load and the load after compression. The method for preventing this requires prior setting to remove settling (See plotted as a straight line. However, the actual load curve will not be a simple straight line but a curve.
page 36).
29 30
 WAVE WASHERS AND OTHERS

Wave Washer Wave Washer for Bearing

RE TAININ G
RIN GS
PUS H NU TS
t t
d d
H H
D D

WAV E WA S H E R S
Unit: mm Unit: mm

A N D OT H E R S
d D H t Bearing
Size No.
Basic Tol. Basic Tol. Basic Tol. Basic Tol. Size No. outer d D H t Applicable bearing No.
WW- 4 4.3 8 1.5 0.2 ±0.02 diameter
5 5.4 9 1.5 0.3 BWW- 624 13 8.8 12.8 1.5 0.15 695 624 633
6 +0.5
6.4 11 1.5 0.3 625 16 12 15 2 0.15 625 634
8 8.5 12.5 2 0 0.3 626 19 12.7 18.1 2.5 0.2 698 607 626 635
10 +0.3 0
10.5 14.5 2 0.3 608 22 14.5 21 2.4 0.2 6900 608 627 636

S CRE W T YPE
- 0.15 - 0.5

PL AT E N U TS
12 12.5 17 2.5 0.3 629 26 19.5 24.8 3.2 0.2 6000 629 637
14 14.5 20 2.5 0.3 6001 28 20.9 26.9 3 0.25 6902 6001 638
+0.7
16 16.7 22.5 2.5 0.3 6200 30 22 28.5 4.1 0.25 6903 6200 639
0 ±0.025
18 18.7 26 3 0.3 6201 32 23.5 30.5 4 0.25 6002 6201
20 20.7 29.1 3 0.3 6202 35 26.4 33.9 3.5 0.3 6003 6202 6300
23 23.5 31 3.5 +1
0 0.3 6203 40 29.8 38.3 5 0.3 6203
26 26.4 +0.5 34.2 0 3.5 0.3 6302 42 30.1 40.6 4.5 0.3 6905 6004 6302
30 30.4 - 0.3 39.3 - 0.8 3.5 0.3 6303 47 33.7 45.5 5 0.3 6906 6005 6204 6303

SPRIN G PINS
32 33.9 46 4.5 0.3 6304 52 38.5 50 7.2 0.3 6205 6304
38 39 51 5 0.3 6305 62 47.2 60.2 6.5 0.4 6908 6007 6206 6305 6403
+1
40 40.6 53.5 5 0.3 6306 72 55 70.5 7 0.45 6910 6207 6306 6404
- 0.5
46 47.5 +0.7 61 0 5.5 0.4 6307 80 61.3 77.8 8.5 0.45 6911 6010 6208 6307 6405
50 51.4 - 0.5 67.5 -1.2 5.5 0.4 ±0.03 6308 90 69 88.5 7 0.6 6913 6011 6210 6308 6406
53 54 69.8 6 0.45 6309 100 79.3 98.8 6.5 0.7 6914 6013 6211 6309 6407
60 61.9 79 6.5 0.45 6310 110 88.9 108.9 8 0.8 6916 6014 6212 6310 6408
6311 120 95.8 118.9 8.5 0.8 6917 6213 6311 6409

S N AP PINS
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP) 6312 130 108.3 128.3 11 0.8 6919 6017 6215 6312 6410
6313 140 112.4 138.4 11 0.8 6920 6018 6216 6313 6411

1. The value d is the diameter of inscribed circle. The value D is the diameter of circumscribed circle. Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
2. The value H is a dimension when three threads are flush with each other with parallel two planes compressed (see Fig. 1).
3. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
1. The value d is the diameter of inscribed circle. The value D is the diameter of circumscribed circle.

J OIN T CLIPS
2. The value H is a dimension when three threads are flush with each other with parallel two planes compressed (see Fig. 1).
Fig. 1
3. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

Fig. 1

Contact point

AS SEM B LY
TO O L S
Contact point

31 32
 WAVE WASHERS AND OTHERS

2 3 ( Reference data: JIS B 2706 )

RE TAININ G
RIN GS
d D: Diameter of outer periphery ( mm )
Fig. 1 Curved Washer R d: Diameter of inner periphery ( mm )
t
t: Plate thickness ( mm )
H0
Ho : Free height ( mm )

PUS H NU TS
h0 R
D ho : Total amount of deflection
( H0 - t ) ( mm )
Fig. 3 Dish Spring E : Longitudinal elastic modulus
d ( N/mm2 ) ( Table 1 )
D : Poisson s ratio of material ( 0.3 )

WAV E WA S H E R S
The coefficients used for calculation are as follows:

A N D OT H E R S
P: Load ( N )
-1 2
:
P Load ( N ) 1 Amount of deflection ( mm )
Load
C1 = · +1 - 2 k: Load rate ( N/mm )
S Stress ( N/mm 2 ) D
4K1 Et 3 =
-1 ln R: Chamfer radius of corner ( mm )

P= (1) D Diameter of outer periphery ( mm)

d C2 =
1 6
· ln · -1
-1 : Stress on position ( N/mm2 )

S CRE W T YPE
ln

PL AT E N U TS
D2 d
t
Diameter of inner periphery ( mm)
Plate thickness ( mm) C3 =
3
· ln
-1
:
:
Stress on position ( N/mm2 )
Stress on position ( N/mm2 )
: Stress on position ( N/mm2 )
Stress Amount of deflection ( mm)
E Longitudinal elastic modulus
1.5P
S= ( N/mm 2 ) ( Table 1 )

SPRIN G PINS
-d
(2) Including the correction item (D - d) - that allows for round chamfering of the corner presents
K1 Load correction coefficient
K1 t 2 [= 1 - d/D ] ( Table 2 ) the load P by the following formula:
D-d 4E t 3
h0 -
P= ( · · C1D2
· · t t · ht0 - 2t + 1
D - d ) - 3R 1 - 2

0.8
Table 1 Longitudinal elastic modulus of main materials ( E ) Table 2

S N AP PINS
0.7
Load correction coefficient ( K1 )

Material Longitudinal elastic modulus ( N/mm2 ) 0.6

The stresses on the positions , , and can be calculated according to the formulas given
Carbon spring steel
below. A positive value indicates tensile stress while a negative value indicates compression stress.
206000 0.5

Stainless steel for spring 0.4

181000
= 4E 2 · t
· · - C2 · ht0 - 2t - C3
0.3 1- C1D2

J OIN T CLIPS
0.2
= 4E 2 · t
· · - C2 · ht0 - 2t - C3
0.1 1- C1D2
0
= 4E 2 · t
· ( 2C3 - C2 ) · ht0 - 2t
0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85
· + C3
Ratio of diameter of inner periphery 1- C1D2
to diameter of outer periphery (d/D)
= 4E 2 · t

AS SEM B LY
· · ( 2C3 - C2 ) · ht0 - 2t - C3

TO O L S
1- C1D2
Notes
There are differences between the calculated and measured values for the formula of deflection and load. Substitution The load rate of the spring is non-linear and can be calculated according to the following equation.
of conditions such as diameters of outer and inner peripheries gives a first-order equation of deflection and load which
2 2
D-d 4E t3
is plotted as a straight line. However, the actual load curve will not be a simple straight line but a curve.
k= dP
= · · · h0 - 3 ht0 · t + 32 t
+1
d (D - d) - 3R 1- 2
C 1D 2 t
33 34
 WAVE WASHERS AND OTHERS

Curved Washer

RE TAININ G
RIN GS
When wave washers, bending washers, and Dish Springs are used under the conditions
shown in ( 1)-( 3 ), the height becomes lower than the initial free height due to the effect
d
D H of settling, and the load changes (See Fig. 1). Compressing before using wave
Unit: mm
washers or disc springs can remove this sagging (See Fig. 2).

PUS H NU TS
d D H
Size No. t
Basic Tol. Basic Tol. Basic Tol. ( 1 ) When a repetitive load is applied
+ 0.2
MB- 4301 4.3 0 6.8 1 ±0.2 0.15
4302 4.3 + 0.3
0 8 ±0.2 1.2 0.3 ( 2 ) When using in a creep condition
5011 5 7.9 + 0.05
1.2 ±0.15 0.15
- 0.15 ( 3 ) When the wave washer gets compressed during installation
5301 5.3 ±0.2 10 1.4 0.3
6203 6.2 11 ±0.2 1.4 ±0.2 0.15

WAV E WA S H E R S
6301 6.3 11 1.5 0.4 Thickness line

A N D OT H E R S
High Initial Load More than 10 times,
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)
Load after settling the free height has little to no change.

Free height (mm )

Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

Load (N)
The characteristics change
due to settling, resulting
in a load difference.

Dish Spring

S CRE W T YPE
PL AT E N U TS
Low
High Low 0 3 10 50 100
Compressed height (mm) Number of setting operations
h
Fig. 1 Fig. 2

SPRIN G PINS
t
2
d h+t
D
Unit: mm For the Wave and Dish Springs, the load and the deflection can be changed according
H (For heavy duty) L (For light duty) to the combination (stacking) methods as shown below (see Fig. 3).

S N AP PINS
d D
Size No. t h + t h +
Basic Tol. Basic Tol. Basic Tol. (Approx.) (Approx.) Basic Tol. (Approx.) (Approx.) However, the Wave Washer needs to be combined with flat washers.
DB- 4 4.2 8 0.4 0.2 0.6 0.3 ±0.025 0.25 0.55
±0.03
5 5.2 10 0.5 0.25 0.75 0.4 0.3 0.7 To make the load larger with a certain deflection, combine the washers in the same direction.
+0.3 ±0.03 0.85
6 6.2 12.5 ±0.3 0.7 ±0.04 0.3 1 0.5 0.35 To make the deflection larger at a certain load, combine them in the face-to-face directions.
7 7.2 - 0.1 14 0.8 0.3 1.1 0.5 0.4 0.9
8 8.2 16 0.9 0.35 1.25 0.6 0.45 1.05 To make both the deflection and load larger, combine them using both the methods.

J OIN T CLIPS
9 9.2 18 1 ±0.05 0.4 1.4 0.7 ±0.04 0.5 1.2
10 10.2 20 1 0.45 1.45 0.8 0.55 1.35
11 11.2 +0.4 22.5 1.2 0.5 1.7 0.8 0.65 1.45 3P
12 12.2 - 0.1 25
±0.4
1.5 ±0.06 0.55 2.05 0.9 0.7 1.6
Fig. 3
±0.05
14 14.2 28 1.5 0.65 2.15 1 0.8 1.8
16 16.3 31.5 1.75 0.7 2.45 1.2 0.9 2.1
18 18.3 35.5 2 ±0.07 0.8 2.8 1.2 ±0.06 1 2.2
20 20.4 +0.5 40 2 0.9 2.9 1.5 1.15 2.65 2P
±0.5
22 22.4 - 0.2 45 2.5 ±0.08 1 3.5 1.75 1.3 3.05
2 ±0.07 1.4 3.4

AS SEM B LY
25 25.4 50 3 1.1 4.1

Load P

TO O L S
28 28.5 56 3 ±0.09 1.3 4.3 2 1.6 3.6
30 31 63 3.5 1.4 4.9 2.5 1.75 4.25
±0.08
35 36 +0.6 71 ±0.6 4 1.6 5.6 2.5 2 4.5
40 41 - 0.4 80 5 1.7 6.7 3 2.3 5.3 P
45 46 91 5 ±0.15 2 7 3.5 ±0.09 2.5 6
50 51 ±0.7 100 ±0.7 6 2.2 8.2 3.5 2.8 6.3
Material = Carbon spring steel Hardness = 40 through 50HRC, Finish = Phosphate coating (ACP)

0 2 3
Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
Deflection
35 36
 5 SCREW TYPE PLATE NUTS U-Type Plate Nut
t

Installed

RE TAINING
RINGS
D2 Screw
A
Common Characteristics
T Boss
Nut
The Screw Type Plate Nut is a thin plate spring nut that has a mount and a threaded portion. Panel
D1
The spring action of the mount prevents dropping off of the nut from the retained part (Except for the

PUS H NU TS
P
F-Type Plate Nut).
B Float HF (Upper hole)
These nuts are lighter than welded and swaged nuts. Thus they allow simplification to address
H (Lower hole)
comparatively light tightening requirements.
These nuts can be used in locations where the nut cannot be supported by hand or with a tool because
P Boss
of mounting space.

WAVE WASHERS
A ND OT HERS
Unit: mm
Certain nuts have a float on the panel supporting side. This float functions to prevent dropping off the Nuts Remarks Panel size
Applicable
nut and for positioning (Except for the F-Type Plate Nut). Size No. screw P D2
(Note 1) A B D1 t Boss Float Material H HF
Min. Max. Max.
T With Carbon
USN- 3001 M3 × 0.5 18 11.2 9 0.3 0.6 1 7.5 4 5.5
spring steel
TYPE

1 3006 M3 × 0.5 11.5 8 6 0.3 P Without SUS 0.6 1.2 4.5 4 4

S C R E W T YPE
PL AT E N U T S
3012 3 - 24-thread 11.5 8 6 0.45 P Without SUS 0.6 1.2 4.5 4 4
Characteristics Carbon
4001 M4 × 0.7 20 12.7 10 0.4 T With 0.7 1.2 8 5 7
spring steel
The U-Type Plate Nut is installed to the end of panel initially and
4003 M4 × 0.7 16.5 9 10 0.4 P Without SUS 0.8 1.2 8 5 5
therefore dropping off of nut is prevented to provide excellent
T With Carbon 0.8 1.5 8 5 7
workability. 4004 4 - 16-thread 20 12.7 10 0.8
spring steel

SPRIN G PINS
4005 4 - 16-thread 20 12.7 10 0.8 P Without Carbon 1 1.6 8 5 6
spring steel
TYPE Carbon
4006 4 - 16-thread 16.3 11 8.3 0.6 T With 1 1.6 6.5 5 7
2
spring steel

4007 4 - 16-thread 20 12.7 13 0.45 T Without Carbon 2 2.7 10 5 6

spring steel

Characteristics 4024 4 - 16-thread 17 11 9.1 0.6 T Without Carbon 0.7 1.6 7 5 7

spring steel
This product allows for a wider range in application of the plate 4026 4 - 16-thread 16 11 8 0.5 P With SUS 2 2.5 6 5 6

S N AP PINS
thickness of the applicable panel. 4031 4 - 18-thread 19 9 13 0.45 P Without
Carbon
2 3 10 5 5
spring steel
4037 M4 × 0.7 18 9 12 0.4 P Without SUS 1 1.2 10 5 6
Carbon
4048 4 - 16-thread 24 11 17 0.6 T With 0.7 1.6 14.5 5 7
spring steel
TYPE Carbon
5001 M5 × 0.8 20 12.7 10 0.45 T With 0.7 1.2 8 6.5 8
3 spring steel

J OIN T CLIPS
Carbon
5003 5 - 12-thread 20 13 11.5 0.7 T Without 1 2.3 9 6.5 7
spring steel
Characteristics Carbon
5004 5 - 16-thread 19.6 13 11.6 0.6 P With 0.7 1.5 10 6.5 7.5
spring steel
Can be used in locations other than the end face of the panel. 5008 5 - 16-thread 32.2 12.7 22.2 0.7 P With
Carbon
1 2.6 19 6.5 8
spring steel
Like the P-Type Plate Nut, the spring action is introduced by curving Carbon
5016 5 - 16-thread 16.2 12.7 8.7 0.7 P Without spring steel
0.8 1.6 7 6.5 6.5
the whole nut on an arched line. When installed, the Nut can prevent
Carbon
5017 M5 × 0.8 21 12.7 11.5 0.4 T Without 1.3 2 9 6.5 8
looseness of the panel.

AS SEM B LY
spring steel

TO O L S
Carbon
6001 M6 × 1 20 12.7 10 0.5 T With spring steel 0.7 1.2 8 7.5 9.5
Carbon
6002 6 - 10-thread 21.8 12.7 11.3 0.8 P Without 0.6 1.2 9.5 7.5 7.5
Instructions for Use spring steel
Material = Carbon spring steel Hardness = 40 through 50HRC (38-45HRC only for USN-4024)
( 1 ) Be sure to use the designated thread and panel. Use of an undesignated thread or panel disallows tightening of the Material = Stainless steel for spring
screw.
( 2 ) The Plate Nuts have two sides, front and back. Take care of the orientation of the nut for insertion of the screw. 1. Refer to the JIS standard for the thread size.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
37 38
 SCREW TYPE PLATE NUTS

U-Type Wide Plate Nut

Installed Panel size
t
D2 t
Installed
Screw HF

RE TAINING
D2 Screw

RINGS
A Nut Nut
Panel A
D1 Panel
P D2 D1
P
B HF P

PUS H NU TS
HF (Upper hole)
H (Lower hole) B H (Lower hole)
Unit: mm
Nuts Remarks Panel size
Applicable Unit: mm
Size No. P D2
screw A B D1 t Boss Float Material H HF
Min. Max. Max. Applicable Nuts Remarks Panel size
USN- 4009 M4 × 0.7 11.4 11 5.9 0.4 P With SUS 0.7 0.9 5 4.5 6 Size No. screw P D2
A B D1 t Float H HF

WAVE WASHERS
4015 M4 × 0.7 12.4 11 5.9 0.4 P With SUS 2.5 2.8 4 4.5 6 (Note 1) Min. Max. Max.

A ND OT HERS
4035 4 - 16-thread 12.4 11 5.9 0.4 P With SUS 0.7 0.9 5 4.5 6 WUSN- 4039 4 - 18-thread 21.6 12.7 10.1 0.6 With 0.7 2.5 8 5 7
4036 4 - 16-thread 12.4 11 5.9 0.4 P With SUS 2.5 2.8 4 4.5 6 4044 4 - 18-thread 16.6 13.5 8.6 0.6 Without 0.6 2 7 5 6
Material = Stainless steel for spring 5022 5 - 16-thread 21.7 12.7 10.2 0.7 With 0.7 3.1 8 6 8
5025 5 - 16-thread 20.6 13.5 9.5 0.6 Without 0.6 3.8 8 6 7
t Installed Panel size 5029 5 - 16-thread 21.7 12.7 10.2 0.7 Without 2 3 8 6 7
D2 Material = Carbon spring steel

S C R E W T YPE
Screw HF

PL AT E N U T S
T Boss 1. Refer to the JIS standard for the thread size.
A Nut 2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
D1 Panel

P D2
B
P
F-Type Plate Nut

SPRIN G PINS
HF (Upper hole)
P Boss
H (Lower hole)
Unit: mm
Nuts Remarks Panel size t
Size No. Applicable P D2
Installed
screw A B D1 t Boss Float Material H HF
Min. Max. Max. Screw
Carbon
USN- 4043 4 - 18-thread 10 10 5.5 0.5 T Without spring steel 2.6 2.7 4.5 5 5

S N AP PINS
Nut
5021 5 - 12-thread 20.5 17 9 0.7 P Without SUS 6 7 7.5 6 7 A
Panel
Carbon R
5023 5 - 16-thread 14.5 11 8.6 0.6 P Without spring steel 2 3.5 7 6 6

Carbon HF (Upper hole)

5026 5 - 16-thread 11 10 6 0.5 T Without spring steel 2.6 2.7 5 6 6

Material = Carbon spring steel H (Lower hole)

B

J OIN T CLIPS
Material = Stainless steel (SUS304-CS)
Panel size
USN-4046 Unit: mm
4 - 16 -thread t 0.6
5 Nuts Panel size
Applicable screw
Size No.
(Note 1) A B R t H HF

FSN- 3001 M3 × 0.5 16 10 40 0.3 3.2 4

17 4001 M4 × 0.7 20 13 50 0.4 4.3 5
5001 M5 × 0.8 20 13 50 0.45 5.3 6

JIGS
6001 M6 ×1 20 13 50 0.5 6.4 7
8.5 6
2.4 through 2.8
(Max.) Material = Carbon spring steel

11
1. Refer to the JIS standard for the thread size.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
1. Refer to the JIS standard for the thread size.
2. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

39 40
 6 SPRING PINS Spring Pin (For General Purpose)
Chamfer easy to install 45° 45°
t

E D

RE TAINING
RINGS
Opening
D1 D2 D3
Common Characteristics The clearance C must have dimensions that do not allow contact
of the sides of the Pin as inserted into the applicable hole.
The Spring Pin is a thin sheet rolled in a cylindrical shape and provided with a slit. Inserting (press
1-10 11-30 31-50 51-70 71 or over
fitting) the pin into a hole having a slightly smaller diameter than the diameter of its outer periphery Camber

PUS H NU TS
h 0.2 or under 0.3 or under 0.4 or under 0.5 or under 0.6 or under
causes the inner pressure (pin spreading force) to act on the inner circumference of the hole. This h
prevents dropping off of the pin. Unit: mm

As compared to sold pins, the hollow Spring Pin allows lighter weight. Nominal dia. 1 1.2 1.5 1.6 2 2.5 3 3.5 4 4.5 5 6 8 10 12 13
Max. 1.2 1.4 1.7 1.8 2.25 2.75 3.25 3.84 4.4 4.84 5.4 6.4 8.6 10.6 12.5 13.7
D
Used for positioning, prevention of rotation and prevention of dropping off. Dimension
Min. 1.1 1.3 1.6 1.7 2.15 2.65 3.15 3.7 4.2 4.7 5.2 6.2 8.3 10.3 12.3 13.4
t Basic 0.2 0.25 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.2 1.6 2 2 2.5

WAVE WASHERS
Max. 0.9 1.1 1.4 1.5 1.9 2.4 2.9 3.4 3.9 4.3 4.8 5.8 7.8 9.8 11.7 12.7

A ND OT HERS
Diameter 1 1.2 1.5 1.6 2 2.5 3 3.5 4 4.5 5 6 8 10 12 13
Groove
TYPE +0.08 +0.09 +0.12 +0.15 +0.2
dimention Tol.

1 Length
0 0

Nominal dia.
0 0 0

Basic Tol. 1 1.2 1.5 1.6 2 2.5 3 3.5 4 4.5 5 6 8 10 12 13

Characteristics
4
Used for easy tightening, and positioning. 5 +0.5

S CRE W T YPE
6

PL AT E N U TS
0
It prevents falling out the maiting hole with gripping force. 8
10
The Pin should be doubled if you want to increase the shear load. 12
(The resultant load is given by adding the shear load of inner pin and 14
15
that of outer pin.) 16
18

S PR I N G PI N S
20
22
TYPE

2
24
25 +1
26 0
28
Characteristics
30
The insertion force is smaller than the Spring Pin (For General 32
35
Purpose).

S N AP PINS
36
The slit is waved to prevent entanglement of the product. 38
40
Mainly used for hinges from resin (retained parts will be broken by 45
50
general-purpose pins) as well as in applications where the shear 55
load is lower. 56
60

J OIN T CLIPS
63
65
70
Instructions for Use 75
+1.5
80
With the Pin inserted into the hole, rotating the retained part repeatedly may cause the pin to drop off. 85
0
90
95
100

AS SEM B LY
110

TO O L S
120
130
140
Material = Carbon spring steel Finish = Phosphate coating (ACP) Hardness = 40 through 50HRC (40 through 50HRC only for Nominal dia. 13mm)
Material = Stainless steel for spring (SUS304-CS) Finish = N/A

1. Max. D shall be the maximum value on the circumference of the pin. Min. D shall be the average of the D1, D2, and D3 diameter values.
2. Contact us for products having lengths other than the marked dimensions.
3. marks stand for the dimensions of products of carbon spring steel. The dimensions of products of stainless steel may not be manufactured.
41 Contact us. 42
4. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
 SPRING PINS

Spring Pin (For Light Duty) 7 SNAP PINS

Chamfer easy to install 45° 45° t

RE TAINING
RINGS
D

Common Characteristics
D1 D2 D3
These products are made by coiling of wire rods.
It is used to avoid dropping off of the mating object from dropping off from the counterpart shaft by

PUS H NU TS
Unit: mm inserting the straight part into a hole opened radially on the mating shaft and securing the pin with the
Nominal dia. 1.6 2 2.5 3 4 spring action of the semicircular part.
Max. 1.8 2.25 2.75 3.25 4.4
D
Spring Pin Min. 1.7 2.15 2.65 3.15 4.2 Used to avoid dropping off of retained parts.
t 0.15 0.2 0.25 0.3 0.4
+0.08 +0.09 +0.09 +0.09 +0.12 Can be used in place of split pins.
Groove dimention 1.6 2 2.5 3 4
0 0 0 0 0

WAVE WASHERS
A ND OT HERS
5
6 +0.5
8 0 TYPE
10
12
1
14
16 Characteristics
Length
18
( ) Can be inserted by a single operation and easily removed.

S CRE W T YPE
20

PL AT E N U TS
+1
22 0 Notes
25
28 Inserting the pin with excessive force may cause deformation and
30
32
falling off from the retained part.
36 It is necessary to pay attention to falling off by external interference.
Material = Stainless steel for spring

SPRIN G PINS
TYPE

2
1. Max. D shall be the maximum value on the circumference of the pin. Min. D shall be the average of the D1, D2, and D3 diameter values.
2. Contact us for products having lengths other than the marked dimensions.
3. Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.

Characteristics
This is a snap pin attached with a mechanism to prevent falling off.

S N A P PI N S
Can be inserted by a single operation.
The product itself is designed for disallowing easy falling off.
Notes
Insertion method:
Pinch between the opening and the arch portion on the other side

J OIN T CLIPS
and insert the point of pin (straight-line part) into the hole in the
retained shaft. Rotate the pin approximately 90 degrees
counterclockwise to insert it. Inserting the pin by any other method
may result in deformation disabling it to function normally.
Removal method:
Rotate the pin in the same manner as the insertion method to pull it

AS SEM B LY
TO O L S
out.

43 44
 SNAP PINS

Snap Pin 8 JOINT CLIPS

Applicable shaft

H: Hole dim.

RE TAINING
Approx.1.5 Approx.
d2

RINGS
40°
S
h D Characteristics
R
d It is mainly used to join flanged pipes around water.
L It can be easily combined with one touch, which improves workability.

PUS H NU TS
Since it does not require tools and can be attached and detached by hand, it can
Unit: mm
be installed even in narrow places where there is no space to handle tools.
Snap Pin Applicable shaft
Size No. d1 d2 R h S L D H
Basic Tol. Approx. Approx. Approx. Approx. Max. Approx. Ref. Ref. Instructions for Use

WAVE WASHERS
SSP- 4 1 3 6 2 1 0.5 16.3 4 1.2

A ND OT HERS
±0.02
5 1 3 6.5 2.5 1.5 0.5 17.9 5 1.2 (1) Conditions such as water pressure and operating environment vary from customer
6 1.2 3.6 7.8 3 1.8 0.6 21.2 6 1.5 to customer, so check the specifications of water hammer, thrust load, etc. Piping diagram (example)
8 1.6 4.8 10.4 4 2.4 0.8 27.7 8 1.9
10 1.8 5.4 12.2 5 3.2 0.9 32.6 10 2.2 (2) After installing the Joint Clip, be sure to rotate it left and right to make sure that the
±0.03
12 1.8 5.4 13.2 6 4.2 0.9 35.8 12 2.2 flange of the pipe is inserted in the correct position in the window of the quick
14 2 6 15 7 5 1 40.6 14 2.4 fastener. Incorrect installation may cause the piping to come off.
16 2 6 16 8 6 1 43.8 16 2.4
(3) Since the nominal diameter of the product and the joint diameter do not necessarily Pipe
diameter

S CRE W T YPE
Material = SW-B Finish = Zinc Plate plus Chromate match, check the dimension table / catalog and use the product that matches the Joint

PL AT E N U TS
The value d1 is the diameter of wire rod as material. Flange diameter
fitting diameter (using a product with a mismatched flange diameter may cause the diameter
Joint Clip to fall off or be damaged).
Our products with little marketability may not be in stock. When employing our products, consult with us for their availability. (4) Repeated use (reuse of the product once inserted into the flange) is not
recommended.

SPRIN G PINS
Retaining Pin Joint Clip General Type
Approx.1.5 Applicable shaft R
t
d3 H

S N AP PINS
Approx. 50°
d2 H: Hole dim.
h
E F G
D
R B
d1 b
0.5 Or under Applicable mating parts

JOINT CLIPS
a
L C
A
Unit: mm D
Retaining Pin Applicable shaft
Unit: mm
Size No. d1 d2 R h S a b L d3 D H
Basic Tol. Basic Tol. Approx. Approx. Basic Tol. Max. Approx. Approx. Basic Tol. Approx. Ref. Ref. A D t Applicable mating parts
Size No. B C R
SSP- 5012 1 ±0.02 3 6.5 2.5 1.5 0.5 9.5 1 17.9 2.2 5 1.2 Basic Tol. Basic Tol. Basic Tol. E F G H
6013 1.2 3.6 ±0.4 7.8 3 1.8 ±0.3 0.6 11.4 1.2 21.2 ±1 2.4 6 1.5 Quick- 4 9 11 5.5 11.5 R1 0.5 13 11 4 5

AS SEM B LY
8012 1.6 ±0.03 4.8 10.4 4 2.4 0.8 15.2 1.6 27.7 3.4 8 1.9 6 11 13 6 12 R1 0.8 ±0.04 15 13 6 5.5

TO O L S
10011 1.8 5.4 ±0.6 12.2 5 3.2 ±0.4 0.9 18.1 1.8 32.6 ±1.5 3.6 10 2.2 8 -R3 13 14 6 12 R3 0.8 17 15 8 5.5
12012 1.8 5.4 13.2 6 4.2 0.9 20.8 2 35.8 3.8 12 2.2 10 -R2.5 15 14 6 12 R2.5 0.8 20 17 10 5.5
12.7 -R3 20 ±1 18 6 14 ±0.15 R3 1 26 22 12.7 5.5
Material = SW-B Finish = Zinc Plate plus Chromate
16 A -R3 23 19 6 14 R3 1 30 25 16 5.5
The value d1 is the diameter of wire rod as material. ±0.05
16 B -R3 26 23 6 14 R3 1 34 28 16 5.5
22.2 -R3 29 25 6 14 R3 1 - 32 22.2 5.5
25.4 -R3 35 27 6 16 R3 1 44 38 25.4 5.5
Our products with little marketability may not be in stock. When employing our products, consult with us for their availability.
Material = Stainless steel for spring (SUS304-CSP-3/4H) Hardness = 31HRC or over (310HV or over)

45 46
 9 ASSEMBLY TOOLS Dispenser (ET Stand)

For E-Rings stacked on rail For E-Rings stacked with tape

E T Holder (ETSK-1 or below) (ETSK-1.2 or above)

RE TAINING
RINGS
Spring to hold the rail Rings stacked
Rings stacked in the rail with tape
E Rail

PUS H NU TS
F1
Pillar
Pillar
L

Spring to push out the rail

Guide Insert Part

WAVE WASHERS
A ND OT HERS
Stand Clamping Board
Guide Plate
Stand

Unit:mm
Applicable Size of E-Ring Dimension
Diameter Diameter ET Holder ET Holder
Plate ET Holder Size No.
Size No. of inner of outer thickness L F1 E G H
periphery periphery

S CRE W T YPE
PL AT E N U TS
ETW- 0.6 0.6 1.5 0.2 ETH- 0.6
3.6
0.7 0.67 2 0.2 0.7, 0.8
123 39 12 5
0.8 0.8 2 0.2 0.7, 0.8
5
1 0.98 2.8 0.2 1
1.2 1.2 3 0.3 1.2
1.5 1.5 4 0.4 1.5 122 38 7 9
1.9 1.9 4.5 0.4 1.9
Size chart of Stacked E-Ring and ET Holder used in Dispenser (ET Stand) Unit:mm
2 2 5 0.4

SPRIN G PINS
2
8
2.3 2.3 6 0.4 2.3, 2.5 124 40 10 10 Applicable Size of E-Ring
2.5 2.5 6 0.4 2.3, 2.5 Diameter Diameter ET Stack ET Holder Dispenser (ET Stand)
Size No. of inner of outer Plate Size No. Size No. Size No.
3 3 7 0.6 3, 3.2 thickness
123 43 12 12 periphery periphery
3.2 3.2 7 0.6 3, 3.2
4 4 9 0.6 4 ETW - 0.6 0.6 1.5 0.2 ES- 0.6 ETH- 0.6 ETSK- 00
129 49 18 16 10 0.7 0.67 2 0.2 0.7 0.8 00
5 5 11 0.6 5
6 6 12 0.8 6 0.8 0.8 2 0.2 0.8 0.8 00
154 54 21 18 12 1 0.98 2.8 0.2 1 1 1
7 7 14 0.8 7

S N AP PINS
8 8 16 0.8 8 1.2 1.2 3 0.3 1.2 1.2 1.2
160 60 24 20 1.5 1.5 4 0.4 1.5 1.5 1.5
9 9 18 0.8 9
14 1.9 1.9 4.5 0.4 1.9 1.9 1.9
10 10 20 1 10 163 63 26 23
12 12 23 1 12 165 65 29 26 2 2 5 0.4 2 2 2
2.3 2.3 6 0.4 2.3 2.5 2.5
2.5 2.5 6 0.4 2.5 2.5 2.5
3 3 7 0.6 3 3 3
3.2 3.2 7 0.6 3.2 3 3

J OIN T CLIPS
4 4 9 0.6 4 4 4
5 5 11 0.6 5 5 5
6 6 12 0.8 6 6 6
7 7 14 0.8 7 7 7
8 8 16 0.8 8 8 8
9 9 18 0.8 9 9 9
10 10 20 1 10 10 10
12 12 23 1 12 12 12

A S S E M B LY
TO O L S
47 48
 AS SEMBLY TOOL S

Pliers (A Tool to install C-Type Retaining Ring) memo

L
L
L
B

Model: No.1,2 Model: No.3,4 Model: No.5

Tip Shape

Standard

ST Plier (For Shafts)

Applicable Size
Size No. of Retaining Ring A B L Model

ST-0 4-9 50 150 Approx. 200 No.1

ST-1 10 - 18 50 150 Approx. 200 No.1
ST-2 19 - 30 50 150 Approx. 200 No.1
ST-2N 32 - 58 65 180 Approx. 245 No.2
ST-3 60 - 80 75 210 Approx. 285 No.3
ST-4 82 - 165 90 330 Approx. 420 No.4
ST-5 170 - 300 Approx. 240 No.5

RT Plier (For Groove)

Applicable Size
Size No. of Retaining Ring A B L Model

RT-0 6-9 50 150 Approx. 200 No.1

RT-1 10 - 8 50 150 Approx. 200 No.1
RT-2 19 - 30 50 150 Approx. 200 No.1
RT-2N 32 - 58 65 180 Approx. 245 No.2
RT-3 60 - 80 75 210 Approx. 285 No.3
RT-4N 82 - 175 98 365 Approx. 465 No.4
RT-5 180 - 300 Approx. 240 No.5

49 50
 memo

51