Bronze cda no. 544 temper-hard, substitute material qq-b-750comp b temper-hard, o-a lg 3.000 in. O-a diameter 0.250 in. Porm 0.002in., 1 ea hole 0.062 in. Diameter porm 0.005 in. Through gage at apoint 0.150 in. From end, 125 arithmetical average surface finishall over