... 5/16*2-1/2 (+3 Cr black)1.Metail:Carbon steel,stainless steel,35CrMo,35#.etc.2.Size:1/4-1''3.Standards:DIN ,ANSI ... ,zinc plated,black oxide,hot dip galv.etc.5.Packing:in bulk,15-25kgs per carton,then on pallet or small ... /or samples or. designed by ourseOur products have been exported to many countries,such as United States, Saudi Arabia, Europe,South ...