Aluminum alloy, 6.940 in. Min, 6.950 in. Max o/a lg, 0.684 in.Min, 0.686 in. Max o/a dia, 0.499 in. Min, 0.501 in. Max counterboredia both ends, 1.000 in.Counterbore lg, 0.483 in.Min, 0.490 in. Maxbore diameter both ends, 0.380 in. Bore lg, 0.160 in. Min, 0.166 in. Maxdia 3 holes through, 1 hole 0.090 in. Diameter through