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Single Coil Spring Lock Washers, Heavy Type

ASME/ANSI B 18.21.1 (T2) - 1999

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^*Models with different eras.

Size

10#

12#

1/4

5/16

3/8

7/16

1/2

d	max
d	min
d_c	max
h	min
n	min
n₁	min

0.094	0.107	0.120	0.133	0.148	0.174	0.200	0.227	0.260	0.322	0.385	0.450	0.512
0.088	0.101	0.114	0.127	0.141	0.167	0.193	0.220	0.252	0.314	0.377	0.440	0.502
0.182	0.209	0.223	0.252	0.266	0.307	0.350	0.391	0.489	0.593	0.688	0.784	0.879
0.025	0.031	0.031	0.040	0.040	0.047	0.056	0.063	0.077	0.097	0.115	0.133	0.151
0.040	0.047	0.047	0.055	0.055	0.062	0.070	0.077	0.110	0.130	0.145	0.160	0.176
0.028	0.033	0.033	0.038	0.038	0.043	0.049	0.054	0.077	0.091	0.101	0.112	0.123

Size

9/16

5/8

11/16

3/4

13/16

7/8

15/16

1-1/16

1-1/8

1-3/16

1-1/4

1-5/16

d	max
d	min
d_c	max
h	min
n	min
n₁	min

0.574	0.641	0.704	0.766	0.832	0.894	0.958	1.024	1.087	1.153	1.217	1.280	1.344
0.564	0.628	0.691	0.753	0.816	0.878	0.941	1.003	1.066	1.129	1.192	1.254	1.317
0.975	1.087	1.186	1.285	1.387	1.489	1.590	1.700	1.803	1.903	2.001	2.104	2.203
0.170	0.189	0.207	0.226	0.246	0.266	0.284	0.306	0.326	0.345	0.364	0.384	0.403
0.193	0.210	0.227	0.244	0.262	0.281	0.298	0.319	0.338	0.356	0.373	0.393	0.410
0.135	0.147	0.159	0.171	0.183	0.197	0.209	0.223	0.237	0.249	0.261	0.275	0.287

Size

1-3/8

1-7/16

1-1/2

1-5/8

1-3/4

1-7/8

2-1/4

2-1/2

2-3/4

d	max
d	min
d_c	max
h	min
n	min
n₁	min

1.408	1.472	1.534	1.663	1.789	1.914	2.039	2.293	2.543	2.793	3.043
1.379	1.442	1.504	1.633	1.758	1.883	2.008	2.262	2.512	2.762	3.012
2.301	2.396	2.491	2.694	2.820	2.945	3.144	3.398	3.648	3.910	4.160
0.422	0.440	0.458	0.458	0.458	0.458	0.496	0.496	0.496	0.526	0.526
0.427	0.442	0.458	0.491	0.491	0.491	0.526	0.526	0.526	0.532	0.532
0.299	0.309	0.321	0.344	0.344	0.344	0.368	0.368	0.368	0.372	0.372

Alternative history

ANSI/ASME B 18.21.1 - 1999 ANSI/ASME B 18.21.1 - 2009 ASME B 18.21.12009 - 2016

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