Steel, mil-s-6050, 1.920 in. Lg o/a, 0.802 in. Diameter ball, 0.500 in. Diameter neck, 1.000 in. Diameter flange at base of neck, 0.910 in. H from top of flange to end of shank, 0.866 in. Diameter shank, 1 hole 0.500 in. Diameter by 0.750 in. D, 2 holes 0.221 in. Diameter linearly through side of shank