Click Specification

Same specifications, different dimensions for other parts.

Plain Washers - Type A (ASTM F844)

ASME/ANSI B 18.21.1 - 2009

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Size

10#

3/16

12#

1/4

5/16

3/8

7/16

Series
d	Nominal Size
	max
	min
d_c	Nominal Size
	max
	min
h	Nominal Size
	max
	min

-	-	-	-	-	-	-	-	N	W	N	W	N	W	N
0.078	0.094	0.125	0.156	0.188	0.219	0.25	0.25	0.281	0.312	0.344	0.375	0.406	0.438	0.469
0.078	0.094	0.133	0.164	0.196	0.227	0.265	0.265	0.296	0.327	0.359	0.39	0.421	0.453	0.484
0.073	0.089	0.12	0.151	0.183	0.214	0.245	0.245	0.276	0.307	0.339	0.37	0.401	0.433	0.464
0.188	0.25	0.312	0.375	0.438	0.5	0.562	0.562	0.625	0.734	0.688	0.875	0.812	1	0.922
0.188	0.25	0.32	0.39	0.453	0.515	0.577	0.577	0.64	0.749	0.703	0.905	0.827	1.03	0.937
0.183	0.245	0.307	0.37	0.433	0.495	0.557	0.557	0.62	0.727	0.681	0.868	0.805	0.993	0.915
0.02	0.02	0.032	0.049	0.049	0.049	0.049	0.065	0.065	0.065	0.065	0.083	0.065	0.083	0.065
0.025	0.025	0.04	0.065	0.065	0.065	0.065	0.08	0.08	0.08	0.08	0.104	0.08	0.104	0.08
0.016	0.016	0.025	0.036	0.036	0.036	0.036	0.051	0.051	0.051	0.051	0.064	0.051	0.064	0.051

Size

7/16

1/2

9/16

5/8

3/4

7/8

1-1/8

Series
d	Nominal Size
	max
	min
d_c	Nominal Size
	max
	min
h	Nominal Size
	max
	min

W	N	W	N	W	N	W	N	W	N	W	N	W	N	W
0.5	0.531	0.562	0.594	0.625	0.656	0.688	0.812	0.812	0.938	0.938	1.062	1.062	1.25	1.25
0.515	0.546	0.577	0.609	0.64	0.686	0.718	0.842	0.842	0.968	0.968	1.092	1.092	1.28	1.28
0.495	0.526	0.557	0.589	0.62	0.649	0.681	0.805	0.805	0.931	0.931	1.055	1.055	1.243	1.243
1.25	1.062	1.375	1.156	1.469	1.312	1.75	1.469	2	1.75	2.25	2	2.5	2.25	2.75
1.28	1.092	1.405	1.186	1.499	1.342	1.78	1.499	2.03	1.78	2.28	2.03	2.53	2.28	2.78
1.243	1.055	1.368	1.149	1.462	1.305	1.743	1.462	1.993	1.743	2.243	1.993	2.493	2.243	2.743
0.083	0.095	0.109	0.095	0.109	0.095	0.134	0.134	0.148	0.134	0.165	0.134	0.165	0.134	0.165
0.104	0.121	0.132	0.121	0.132	0.121	0.16	0.16	0.177	0.16	0.192	0.16	0.192	0.16	0.192
0.064	0.074	0.086	0.074	0.086	0.074	0.108	0.108	0.122	0.108	0.136	0.108	0.136	0.108	0.136

Size

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

Series
d	Nominal Size
	max
	min
d_c	Nominal Size
	max
	min
h	Nominal Size
	max
	min

N	W	N	W	N	W	-	-	-	-	-	-	-	-
1.375	1.375	1.5	1.5	1.625	1.625	1.75	1.875	2	2.125	2.375	2.625	2.875	3.125
1.405	1.405	1.53	1.545	1.655	1.67	1.795	1.92	2.045	2.17	2.42	2.67	2.94	3.19
1.368	1.368	1.493	1.49	1.618	1.615	1.74	1.865	1.99	2.115	2.365	2.615	2.865	3.115
2.5	3	2.75	3.25	3	3.5	3.75	4	4.25	4.5	4.75	5	5.25	5.5
2.53	3.03	2.78	3.295	3.03	3.545	3.795	4.045	4.295	4.545	4.795	5.045	5.315	5.565
2.493	2.993	2.743	3.24	2.993	3.49	3.74	3.99	4.24	4.49	4.74	4.99	5.24	5.49
0.165	0.165	0.165	0.18	0.165	0.18	0.18	0.18	0.18	0.18	0.22	0.238	0.259	0.284
0.192	0.192	0.192	0.213	0.192	0.213	0.213	0.213	0.213	0.213	0.248	0.28	0.31	0.327
0.136	0.136	0.136	0.153	0.136	0.153	0.153	0.153	0.153	0.153	0.193	0.21	0.228	0.249

①,Prefered sizes are for the most part from series previously designated "Standard Plate" and "SAE." Where common sizes existed in the two series, the SAE site is designated "N" (narrow) and the Standard Plate "W" (wide).

Alternative history

ANSI/ASME B 18.21.1 - 2009 ASME 18.21.1 - 2009(R2016)

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