Hex Head Bolts 1.Material:Carbon steel 2.Diameter:M2~M64 3:Length:12~300mm 4.Standard:DIN933 Hex Head BoltsHigh quality,Best price and Full-service1.Material:Carbon steel2.Diameter:M2~M643:Length:12~300mm4.Standard:DIN933 5.Packing:Bulk or Small Box,According to customer requirement6.Surface Treatment :Zinc,Black Phosphate,Grey,Nickel,Etc DIN933 Hex Head Bolts