Aluminum alloy, qq-a-601, class 3m, cond t6; anodized, mil-a-8625, type 2; cone shape; flanged on one end; triangular shape flange; w/three 0.190 in. Diameter mtg holes; 1.690 in. Flange id; second end threaded; 1-14 unf 3a external thd; 2.160 in. Lg; 0.160 in. Wall thk of body