1.Material: Stainless steel, carbon steel 2.Standard: DIN, ISO, GB 3.Grade of strength: 4, ... ,10 4.Finish: ZP, HDG, black Bolts Material: Stainless steel, mild steel, carbon steel Standard: DIN, ISO, JIS, AISI, GB, BS, AS, Non ... can be supplied according to customers' drawing or samples stainless steel bolts