ASTM F436 Hardened Steel Washers
Bolt Size, In. 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 11/8 11/4 13/8 11/2 13/4 2 Outside Dia min., In. 0.625 0.688 0.813 0.922 1.063 1.313 1.469 1.750 2.000 2.250 2.500 2.750 3.000 3.375 3.750 Inside Dia.,min In. 0.281 0.344 0.406 0.469 0.531 0.688 0.813 0.938 1.125 1.250 1.375 1.500 1.625 1.875 2.125 Thickness min 0.051 0.051 0.051 0.051 0.097 0.122 0.122 0.136 0.136 0.136 0.136 0.136 0.136 0.178 0.178
Bolt Size, In. 2 1/4 2 1/2 2 3/4 3 3 1/4 3 1/2 3 3/4 4 Outside Dia min., In. 4.000 4.500 5.000 5.500 6.000 6.500 7.000 7.500 Inside Dia.,min In. 2.375 2.625 2.875 3.125 3.375 3.625 3.875 4.125 Thickness min 0.240 0.240 0.240 0.240 0.240 0.240 0.240 0.240