9aluminum alloy, qq-a-225/6, alloy 2024-t4, anodize, mil-a-8625; 0.320 in. O/a thk; 1.750 in. Flange dia; 0.060 in. Flange thk; two through holes on flange, 0.128 in. Diameter on 1.500 bolt circle dia; thd relief 0.080 in. W by 1.310 in. Dia; 1.375-18 unef 2a thd
