ASME B18.21.1 Extra Duty Helical Spring – Adfast Components

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Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

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Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

materials

Carbon Steel

Alloy Steel

Stainless Steel

Super Alloys

Non Ferrous Metal & Alloys

High Performance Nickel Alloys

Copper Alloys

Technical

Specification

Standard

Weight

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Threads
Contact

Home
About
Product
Product

Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

Precision Components

Pumps & Valves

Automobile

Customised

Electronic

Medical

Contract Manufacturing

3D Printing & Additive Manufacturing

Fastener

Bolts

Coated Fasteners

Washer

Stud Bolts

Nuts

Screws
Resources
Resources

Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

materials

Carbon Steel

Alloy Steel

Stainless Steel

Super Alloys

Non Ferrous Metal & Alloys

High Performance Nickel Alloys

Copper Alloys

Technical

Specification

Standard

Weight

Applications

Threads
Contact

ASME B18.21.1 Extra Duty Helical Spring

Dimensions of ASME B18.21.1 Extra Duty Helical Spring Lock Washers

Nominal Washers Size	Inside Diameter, A		Outside Diameter, B, Max	Mean Section Thickness (t₁ + t₂)/2, T, Min	Section Width, W, Min	Bearing Width, BW, Min
Nominal Washers Size	Max	Min	Outside Diameter, B, Max	Mean Section Thickness (t₁ + t₂)/2, T, Min	Section Width, W, Min	Bearing Width, BW, Min
2	0.094	0.088	0.208	0.027	0.053	0.037
3	0.107	0.101	0.239	0.034	0.062	0.043
4	0.120	0.114	0.253	0.034	0.062	0.043
5	0.133	0.127	0.300	0.045	0.079	0.055
6	0.148	0.141	0.314	0.045	0.079	0.055
8	0.174	0.167	0.375	0.057	0.096	0.067
10	0.200	0.193	0.434	0.068	0.112	0.078
12	0.227	0.220	0.497	0.080	0.130	0.091
1/4	0.260	0.252	0.533	0.084	0.132	0.092
5/16	0.322	0.314	0.619	0.108	0.143	0.100
3/8	0.385	0.377	0.738	0.123	0.170	0.119
7/16	0.450	0.440	0.836	0.143	0.186	0.130
1/2	0.512	0.502	0.935	0.162	0.204	0.143
9/16	0.574	0.564	1.035	0.182	0.223	0.156
5/8	0.641	0.628	1.151	0.202	0.242	0.169
11/16	0.704	0.691	1.252	0.221	0.260	0.182
3/4	0.766	0.753	1.355	0.241	0.279	0.195
13/16	0.832	0.816	1.458	0.261	0.298	0.209
7/8	0.894	0.878	1.571	0.285	0.322	0.225
15/16	0.958	0.941	1.684	0.308	0.345	0.241
1	1.024	1.003	1.794	0.330	0.366	0.256
1 1/16	1.087	1.066	1.905	0.352	0.389	0.272
1 1/8	1.153	1.129	2.013	0.375	0.411	0.288
1 3/16	1.217	1.192	2.107	0.396	0.431	0.302
1 1/4	1.280	1.254	2.222	0.417	0.452	0.316
1 5/16	1.344	1.317	2.327	0.438	0.472	0.330
1 3/8	1.408	1.379	2.429	0.458	0.491	0.344
1 7/16	1.472	1.442	2.530	0.478	0.509	0.356
1 1/2	1.534	1.504	2.627	0.496	0.526	0.368
1 5/8	1.663	1.633	2.784	0.496	0.526	0.368
1 3/4	1.789	1.758	2.902	0.526	0.532	0.372
1 7/8	1.914	1.883	3.027	0.526	0.532	0.372
2	2.039	2.008	3.156	0.526	0.532	0.372

Notes : Dimensions are in inches.