2.258" hole diameter 3.120" outside diameter 0.062" material thickness one internal key, 0.176 in. wide, 0.190 in. from centerline to top of key; 4 holes 0.093 in. dia equally spaced in periphery recessed
0.809" hole diameter 1.500" outside diameter 0.188" material thickness chamfered 0.030 in. by 45 deg on od of flat surface cadmium surface treated 15 recessed