Steel c1015-c1025, 4.813 in. Lg o/a, shank diameter 0.625 in., 0.625-11 unc-2a x 1.500 in. Lg, 2 flats 2.000 in. From thd end, 0.500 in. Width between flats, unthreaded end flatten 0.625 in. Lg, 0.312 in. Width between flats, 0.188 in. Diameter through hole on flatted end