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Retaining Rings/External/C-Type (Part Numbers)

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Volume Discount

[Features]·A C-type retaining ring, external. ·The unit of purchase is loose (available in quantities of 1 pc.). ·The retaining ring type is an outer ring retaining ring.

(i)Caution

[Specification Change] The material of stainless steel products will be changed sequentially starting in July 2025. Please see here for details.
There is a possibility that products and packages before and after the change may be mixed in the same shipment, but there will be no problems with use.
Please check the content on our website as the PDF does not contain the most up-to-date information.

Part Number

Configured Part Number is shown.

Drawing/Specifications
3D Preview
Part Numbers
Catalog

STWN
STWS (Stainless Steel)

No. 8 or Less

Applicable Shaft

d₄: Maximum O.D. when a retaining ring is fitted inside d₁
(Clearance O.D.)

Type	[ M ]Material	[ H ]Hardness
STWN	Spring Steel	44~53HRC
STWS	SUS304-CSP Equivalent	36~44HRC

Specifications

Part Number

STWS6

Part Number		Retaining Ring							Reference:	Applicable Shaft (Reference)
Part Number		Retaining Ring							Reference:	Applicable Shaft (Reference)
Type	No.	D₃		t		b (Approx.)	a (Approx.)	d₀ (Min.)	d₄	d₁	d₂		m		n (Min.)
Type	No.	D₃	Tolerance	t	Tolerance	b (Approx.)	a (Approx.)	d₀ (Min.)	d₄	d₁	d₂	Tolerance	m	Tolerance	n (Min.)
STWN	3	2.7	+0.04 －0.15	0.25	±0.025	0.5	1.7	0.7	7	3	2.85	0 － 0.04	0.35	+ 0.10 0	0.3
	4	3.7		0.4	±0.03	0.9	2.2	0.8	9	4	3.8		0.5
	5	4.7		0.6	±0.04	1.1	2.4	0.8	10.5	5	4.8		0.7
	6	5.6	+0.06 －0.2	0.7		1.3	2.8	1	12	6	5.7		0.8		0.5
	7	6.5		0.8		1.4	3		14	7	6.7	0 － 0.06	0.9		0.5
	8	7.4		0.8		1.6	3		15	8	7.6	0 － 0.06	0.9		0.6
STWS (Stainless Steel)	4	3.6	±0.1	0.25	±0.03	0.7	1.4	0.7	9	4	3.7	± 0.06	0.3	+ 0.10 0	1.0
	5	4.5		0.4	±0.04	0.7	1.4		10.5	5	4.7		0.45		1.5
	6	5.5		0.4		0.8	2.0		12	6	5.7		0.45
	7	6.3		0.65		0.9	2.0	1	14	7	6.5		0.7
	8	7.1		0.65		1.0	2.2	1	15	8	7.4		0.7
STWN STWS (Stainless Steel)	10	9.3	±0.15	1	±0.05	1.8	3	1.2	17	10	9.6	0 － 0.09	1.15	+ 0.14 0	1.5
	11	10.2	±0.15			2	3.1	1.2	18	11	10.5	0 － 0.11
	12	11.1	±0.18			2.1	3.2	1.5	19	12	11.5
	13	12				2.1	3.3	1.5	20	13	12.4
	14	12.9				2.2	3.4	1.7	22	14	13.4
	15	13.8					3.5		23	15	14.3
	16	14.7					3.6		24	16	15.2
	17	15.7					3.7		25	17	16.2
	18	16.5		1.2	±0.06	2.6	3.8		26	18	17		1.35
	19	17.5				2.7	3.8	2	27	19	18
	20	18.5	±0.2				3.9		28	20	19	0 － 0.21
	21	19.5					4		30	21	20
	22	20.5					4.1		31	22	21
	23	21.4				2.9	4.5		32.5	23	22
	24	22.2				3.1	4.2		33	24	22.9
	25	23.2					4.3		34	25	23.9
	26	24.2					4.4		35	26	24.9
	28	25.9		1.5			4.6		38	28	26.6		1.65
	29	26.9				3.5	4.7		39	29	27.6
	30	27.9					4.8		40	30	28.6
	32	29.6					5	2.5	43	32	30.3	0 － 0.25
	35	32.2	±0.25			4	5.4		46	35	33
	40	37	±0.4	1.75	±0.07	4.5	5.8		53	40	38		1.9		2
	45	41.5		1.75		4.8	6.3		58	45	42.5		1.9
	50	45.8		2		5	6.7		64	50	47		2.2
	52	47.8				5	6.8		66	52	49
	60	55.8	±0.45			5.5	7.2		75	60	57	0 － 0.3
	80	74.5	±0.45	2.5	±0.08	7.4	8.2		97	80	76.5	0 － 0.3	2.7		2.5

Part Number

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Part Number

Part Number	Minimum order quantity	Volume Discount	Days to Ship	RoHS	Nominal	Material	Shaft or Hole Used d1 (Reference) (mm)	Applicable Shaft or Hole d2 (Reference) (mm)	Shaft / Shaft Bore / Groove Nominal (Reference) (mm)

Product TOP

Basic Information

Type	Retained with Outer Ring	Shape	Standard Type (C-Ring)	Retaining Ring Type	Retained with Outer Ring
Mounting Method Type	Standard	Sales Unit	Low Quantity (Available beginning with 1 pc.)	Product Type	Retaining Ring

Configure

67 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Nominal
3

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8

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Clear
Material
Steel

Stainless Steel
Clear
Shaft or Hole Used d1 (Reference)(mm)
3

4

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8

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Clear
Applicable Shaft or Hole d2 (Reference)(mm)
2.85

3.7

3.8

4.7

4.8

5.7

6.5

6.7

7.4

7.6

9.6

10.5

11.5

12.4

13.4

14.3

15.2

16.2

17

18

19

20

21

22

22.9

23.9

24.9

26.6

27.6

28.6

30.3

33

38

42.5

47

49

57

76.5
Clear
Shaft / Shaft Bore / Groove Nominal (Reference)(mm)
3

4

5

6

7

8

10

11

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13

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52

60

80
Clear
type
- STWN
- STWS
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

1 Day(s) or Less

2 Day(s) or Less

4 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

Question: What is a C-type retaining ring?: Answer: A C-type retaining ring is a metal ring used to secure components on a shaft or in a bore. It is designed to fit into a machined groove and prevent axial movement of the components.
Question: What are the common uses of C-type retaining rings?: Answer: C-type retaining rings are used to hold components in place on shafts or within bores in various applications, such as automotive, machinery, and equipment assemblies.
Question: How are C-type retaining rings installed?: Answer: They are typically installed using special pliers designed for snap rings. The pliers compress the ring, allowing it to fit into the groove on a shaft or bore.
Question: What are the types of C-type retaining rings?: Answer: This is external C-type rings for shafts.

Check other FAQ (1 items) Hide

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Retaining Rings/External/C-Type (Part Numbers)

(i)Caution

Specifications

Part Number

Basic Information

Configure

Specification/Dimensions

Nominal

Material

Shaft or Hole Used d1 (Reference)(mm)

Applicable Shaft or Hole d2 (Reference)(mm)

Shaft / Shaft Bore / Groove Nominal (Reference)(mm)

type

CAD

Days to Ship

Specify Alterations

Frequently asked question (FAQ)

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Complementary Products

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