Matl aluminum, 6061-t6; finish anodize, mil-a-8625, type ii, class 2; 1.800 in. O/a dia; 0.125 in. O/a thk; one 0.800 in. Diameter hole through with 1.000 in. Diameter counterbore centrally located; three 0.106 in. Diameter holes through with countersink to 0.208 in. Diameter 0.065 in. Dp on 1.400 in. Diameter irregularly spaced; one 0.094 in. Diameter hole through on a 0.565 in. Radius