Cres, ams5616, surface treatment immunized, rockwell hardness c scale, 42 to 50, 3.200 in. O/a lg, 0.248 in. Min, 0.249 in. Max o/a dia, one end0.250-28 unf 2a thd, 0.780 in. Thd lg, keyway 0.070 in. Min, 0.080 in. Maxw, 0.068 in. Min, 0.079 in. Depth