Steel pin, cadmium plated, shank 0.374 in. Dia, 0.983 in. Lg, grip 0.438 in. Lg, head 0.565 in. Dia, 0.135 in. H, 3/8-24unjf-3a thd, hex. Socket bottom of shank 0.160 in. W across flats, cres collar, cadmium plated, 3/8-24unjf-3b thd, aluminum washer, anodized, 0.665 in. Od, 0.010 in. Thk