Specifications For Coiled Tension Pins

Inch Series ASME B18.8.2

inch coiled spring pins

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Nominal size or Basic Pin Diameter (Inch)	A						B	C	Recommended Hole size		Double Shear load, Min., lb.
	Pins Diameter						Chamfer				Standard Duty Or Medium Duty		Heavy Duty		Light Duty
	Standard Duty		Heavy Duty		Light duty		Diameter	Length			Material
	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Ref.	Max.	Min.	SAE 1070-1095 and SAE 51420	SAE 30302 and SAE 30304	SAE 1070-1095 and SAE 51420	SAE 30302 and SAE 30304	SAE 1070-1095 and SAE 51420	SAE 30302 and SAE 30304
1/16 0.062	0.072	0.067	0.070	0.066	0.073	0.067	0.059	0.028	0.065	0.061	330	265	475	360	205	160
5/64 0.078	0.088	0.083	0.086	0.082	0.089	0.083	0.075	0.032	0.081	0.077	550	425	800	575	325	250
3/32 0.094	0.105	0.099	0.103	0.098	0.106	0.099	0.091	0.038	0.097	0.093	775	600	1,150	825	475	360
1/8 0.125	0.138	0.131	0.136	0.130	0.139	0.131	0.121	0.044	0.129	0.124	1,400	1,100	2,000	1,700	825	850
5/32 0.156	0.171	0.016	0.168	0.161	0.172	0.163	0.152	0.048	0.160	0.155	2,200	1,700	3,100	2,400	1,300	1,000
3/16 0.187	0.205	0.196	0.202	0.194	0.207	0.196	0.182	0.055	0.192	0.185	3,150	2,400	4,500	3,500	1,900	1,450
7/32 0.219	0.238	0.228	0.235	0.226	0.240	0.228	0.214	0.065	0.224	0.217	4,200	3,300	5,900	4,600	2,600	2,000
1/4 0.250	0.271	0.260	0.268	0.258	0.273	0.260	0.243	0.065	0.256	0.247	5,500	4,300	7,800	6,200	3,300	2,600
5/16 0.312	0.337	0.324	0.334	0.322	0.339	0.324	0.304	0.080	0.319	0.308	8,700	6,700	12,000	9,300	8,200	4,000
3/8 0.375	0.403	0.388	0.400	0.386	0.405	0.388	0.366	0.095	0.383	0.370	12,600	9,600	18,000	14,000
7/16 0.437	0.469	0.452	0.466	0.450	0.471	0.452	0.427	0.095	0.446	0.431	17,000	13,300	23,500	18,000
1/2 0.500	0.535	0.516	0.532	0.514	0.537	0.516	0.488	0.110	0.510	0.493	22,500	17,500	32,000	25,000
5/8* 0.625	0.661	0.642	0.658	0.640			0.613	0.125	0.635	0.618
3/4* 0.750	0.787	0.768	0.784	0.766			0.738	0.150	0.760	0.743

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Length (Inch)+A23:O59

Diameter (Inch)

0.062

0.078

0.094

0.125

0.156

0.187

0.219

0.250

0.312

0.375

0.437

0.500

0.625

0.750

1/4

5/16

3/8

7/16

1/2

9/16

5/8

11/16

3/4

13/16

7/8

15/16

1-1/8

1-1/4

1-3/8

1-1/2

1-5/8

1-3/4

1-7/8

2-1/4

2-1/2

2-3/4

3-1/4

3-1/2

3-3/4

4-1/4

4-1/2

4-3/4

5-1/4

5-1/2

5-3/4

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Technical Data
Specifications		Material	Stainless Steel
ASME B 18.8.2-2000		Carbon Steel	Martensitic Chrome 420	Austenitic Nickel SAE 302-SAE 304
NASM10971		Per specifications
NAS 1407
NAS561
NASM39086
Hardness
Diameter	Scale
1/16 -3/32	Vickers	420-545	460-560	work Hardened
1/8-5/16	Rockwell 15N	82 - 86.4	83.5 - 86.9	work Hardened
	Rockwell C	43-52	46 - 53
3/8 -1/2	Rockwell A	72 - 76.8	73.6 - 77.4	work Hardened
	Rockwell C	43-52	46-53

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Length Tolerances
Nominal Pin Length	Length Tolerance
up to 2"	+/- 0.010
Over 2" to 3"	+/- 0.015
Over 3"	+/- 0.020

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Straightness Tolerances
Pin Length		Tolerance
Up to 1"		0.007
over 1" to 2"		0.010
Over 2"		0.013

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Specifications For Coiled Tension Pins

Inch Series ASME B18.8.2

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