Top Grade Customized 99.95% Moly Bolt Nut And Molybdenum Screw Product: Top Grade Customized 99.95% Moly Bolt Nut And Molybdenum Screw Material: Carbon Steel Stainless steel, Alloy Steel etc Size: M4-M100 1/4"-4" Length: 6mm to 100mm Thread: UNC, UNF are available Surface Treatment: Black oxide, zinc plate, copper plating, Dacromet, Teflon, phosphating Certificate: ISO9001:2008, ROHS, SGS, CE Standard: DIN, ISO, ANSI, ASTM, GB, JIS Sample: Sample is free of charge. Delivery: 25days per 20GP, small quantity can delivery immediately After-sale: Solve all your problems satisfied after sales Class: 4.8, 5.8, 8.8, 10.9, 12.9