... .Material:Carbon steel.Stainless steelWe sell the products as follows1.Nuts: Hex nut(DIN934,ISO4032,DIN439,DIN936,ANSI, B 18 ... DIN316). Carriage bolt(DIN603), Allen bolt(DIN912), T bolt.3.Screws: Drywall screw, Wood screw. Self driling screw, Self-tapping screw ... . Butterfly screws. Furniture nut, Set screw(DIN914), Double sided screw, flat screw ...