2.190" hole diameter 3.130" outside diameter 0.120" material thickness navy special project external key contains a 0.062 inch dia hole, and washer has an internal straight key key
0.332" hole diameter 0.520" outside diameter 0.040" material thickness larger key has a round edge with a 0.070 inch dia wire hole cadmium surface treated key
0.629" hole diameter 0.868" outside diameter 0.149" material thickness both keys tapered, 0.069 in. minor width; center hole round w/flats, 0.505 in. wide key
0.759" hole diameter 1.133" outside diameter 0.069" material thickness internal key not prebent, 4 projections equally spaced on washer face, 0.054 in. high by 0.092 in. wide cadmium surface treated internal prebent key