... , etc) 1. material:carbon steel 2. standard:GB/DIN/ANSI.etc various of standard and non-standard fasteners (bolts, nuts, screws, etc) 1 ... .Metail:Carbon steel,stainless steel,35CrMo,35#.etc.2.Size:M2 ... -M683.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard,JB/T4.Surface:plain,zinc ...