... Material: Iron, stainless steel SUS 316, SUS304, SUS201 and SUS200, copper and etc. Hex bolt Material: Iron, stainless steel SUS 316 ... , SUS304, SUS201 and SUS200, copper and etc. Bolt Standard: DIN 933, DIN 931, DIN 558 ... Finish: Various of finish is available, such as Zinc plate, plain finish, copper plate, nickel plate Grade: 4.8, 6.8, 8.8, 10 ...