Specifications: 1) Materials: 1010, 1018, 1022, 1035, 5140, 4135, and 4140 2) Finish: zinc plated Specifications:bolt1) Materials: 1010, 1018, 1022, 1035, 5140, 4135, and 41402) Finish: zinc plated (trivalent chromium or sexivalent chromium), dacromet plated,nickel plated, oxidation plated, plain finish