Matl aluminum alloy, 2024-t3; finish anodize, mil-a-8625, type 1; 0.862 in. O/a lg; 0.620 in. O/a w; 0.063 in. Thk; two 0.093 in. Diameter through mtg holes with 82 degrees countersink to 0.180 in. Diameter irregularly spaced; one 0.136 in. Diameter through hole with counterbore to 0.281 in. Diameter centrally located