Technical Info

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USS Flat Washers per ASME B18.21.1.

Size	Inside Diameter (ID)			Outside Diameter (OD)			Thickness (TH)
	Tolerance			Tolerance			Thickness (TH)
	Basic	Plus	Minus	Basic	Plus	Minus	Max	Min
3/16	0.250	0.015	0.005	0.562	0.015	0.005	0.065	0.036
1/4	0.312	0.015	0.005	0.734	0.015	0.007	0.080	0.051
5/16	0.375	0.015	0.005	0.875	0.030	0.007	0.104	0.064
3/8	0.438	0.015	0.005	1.000	0.030	0.007	0.104	0.064
7/16	0.500	0.015	0.005	1.250	0.030	0.007	0.104	0.064
1/2	0.562	0.015	0.005	1.375	0.030	0.007	0.132	0.086
9/16	0.625	0.015	0.005	1.469	0.030	0.007	0.132	0.086
5/8	0.688	0.030	0.007	1.750	0.030	0.007	0.160	0.108
3/4	0.812	0.030	0.007	2.000	0.030	0.007	0.177	0.122
7/8	0.938	0.030	0.007	2.250	0.030	0.007	0.192	0.136
1	1.062	0.030	0.007	2.500	0.030	0.007	0.192	0.136
1-1/8	1.250	0.030	0.007	2.750	0.030	0.007	0.192	0.136
1-1/4	1.375	0.030	0.007	3.000	0.030	0.007	0.192	0.136
1-3/8	1.500	0.045	0.010	3.250	0.045	0.010	0.213	0.153
1-1/2	1.625	0.045	0.010	3.500	0.045	0.010	0.213	0.153
1-5/8	1.750	0.045	0.010	3.750	0.045	0.010	0.213	0.153
1-3/4	1.875	0.045	0.010	4.000	0.045	0.010	0.213	0.153
1-7/8	2.000	0.045	0.010	4.250	0.045	0.010	0.213	0.153
2	2.125	0.045	0.010	4.500	0.045	0.010	0.213	0.153
2-1/4	2.375	0.045	0.010	4.750	0.045	0.010	0.248	0.193
2-1/2	2.625	0.045	0.010	5.000	0.045	0.010	0.280	0.210
2-3/4	2.875	0.065	0.010	5.250	0.065	0.010	0.310	0.228
3	3.125	0.065	0.010	5.500	0.065	0.010	0.327	0.249