Steel, aisi b1111 or b1112, cadmium plate, 0.625 in. Lg, 0.562 in.Bottom dia, 1.062 in.Top dia, drill 0.1015 in. Diameter hole through center axis, tap through, 0.125-40, unc, 3b, rh thd, 0.031 in.W slot, 0.500 in. Deep from bottom, 0.062 in.By @30.0 degrees chamfer around bottom dia