Steel ams6431, casehardened, 1.1250 in. Min, 1.255 in. Max od, 0.695 in. Nom lg. 0.650 in. Nom id, 1.013 in. Min, 1015 in. Max diameter counterbore, 0.250 in. Nom w groove on od located 0.140 in. Nom distance from smallest diameter end, 12 slots 0.185 in. Min, 0.195. Max w equally spaced on od