Used on 4920-01-511-0092. 0.176" hole diameter 0.340" outside diameter 0.018" material thickness internal-tooth lock washer actual matl is 410 stainless steel flat internal teeth
Used on buffalo. washer, flat 3/4 uss uss bowmalloy flat washers, washer, flat, 3/4", medium carbon steel bowmalloy, uss 1050-1060 rc 38-42c per bowman print gold dichromate & bake. units per pk = 50 bd item 39757