Aluminum alloy sand casting per qq-a-601, class 3m, condition t6, anodic finish, dyed black, 6.687 in. Od, 5.939 in. Id, 2.298 in. Lg opening on 6.000 in. Dia, 0.520 in. Shoulder thk, 2 ea 1.240 min, 1.260 in. Max in. Slots, 0.125 in. X 45.0 degrees chamfer, 0.625 in. Shank h, 7.750 in. O/a lg