... #-3" 2) Material: RoHS brass,copper,bronze, etc 3)Standard: GB,DIN,BS,ISO,ANSI(IFI),etc Products Information: 1Product:Bolt ... : Copper, Bronze, Brass, Stainless steel, Aluminum, Grade.12.9 steel3Standard :GB, DIN, BS, ASTM, ISO, ANSI(IFI), JIS, or as customer ... trust our product quality.Other Products: environmental brass external teeth lock washer