9steel mil-s-5000, comp4340, 2.265 in. Lg, 1.005 in. Dia, 0.635 in. Diameter hole through center, 0.751 in. Diameter hole in one end 0.960 in. Deep, 1 hole through both walls on large end 0.315 in. Dia, splined end 0.973 in. Major dia, 15 teeth, 30.0 degrees pressure angle
