"Material: Aluminum alloy, QQ-A-20013; Finish: Anodize black, MIL-A-8625, CL 2, Type 2, Epoxy polyamide primer, MIL-P-23377, Black lusterless paint, Fed Std 595, White lusterless epoxy polyamide, MIL-C-22750; Piece shaped with a 120-degree angle offset of 0.157 inches, Angle radius of 0.156 inches; Overall diameter of 0.750 inches; One hole: 4-40 UNC 2B, 0.156 inches deep; One hole: 0.047 inches in diameter, 0.156 inches deep; One hole: 0.650 to 0.680 inches in diameter, 0.344 inches deep."