various of standard and non-standard fasteners (bolts, nuts, screws, 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 ... ,Europe,South Korea,Southeast various of standard and non-standard fasteners (bolts, nuts, screws, etc)