O/a lg 0.612 in.; material aluminum alloy, qq-a-225/8, 6061, t6 or qq-a-200/8, 6061, t6510; finish chromate, mil-c-5541, cl 1a; head 0.250 in. Hex, lg 0.290 to 0.310 in. Lg one side, 0.190 to 0.210 other side; thd 0.112-40 unc 2a at other end to a lg of 0.210 in. Min
