Competitive price, good quality, best service, Relia is your correct choice! STANDARD: ASME, DINTYPE: MACHINE SCREW, HEX CAP SCREW, HEX BOLT, DIN933, DIN931GRADE: 2(4.8), 5(10.9), 8(12.9)MATERIAL: CARBON STEEL, STAINLESS STEEL, BRASS, ALUMINIUMSURFACE: PLAIN, BLACK, ZINC PLATED Hex Bolt, Hex Cap Screw, Machine Screw