Dimensions of ASME B18.21.1 Heavy Internal Tooth Lock Washers

Nominal Washers Size	Inside Diameter, A		Outside Diameter, B		Thickness, C
	Max	Min	Max	Min	Max	Min
1/4	0.267	0.256	0.536	0.500	0.045	0.035
5/16	0.332	0.320	0.607	0.590	0.050	0.040
3/8	0.398	0.384	0.748	0.700	0.050	0.042
7/16	0.464	0.448	0.858	0.800	0.067	0.050
1/2	0.530	0.512	0.924	0.880	0.067	0.055
9/16	0.596	0.576	1.034	0.990	0.067	0.055
5/8	0.663	0.640	1.135	1.100	0.067	0.059
3/4	0.795	0.768	1.265	1.240	0.084	0.070
7/8	0.927	0.894	1.447	1.400	0.084	0.075

Notes : Dimensions are in inches.