... ,BS,ISO 4)Environmental surface treatment Products Information: 1Product:Bolt, Nut, Screw, Washer, Nails, Rivet, Insert, Brass fitting,Threaded rod, etc ... .12.9 steel3Standard :GB, DIN, BS, ASTM, ISO, ANSI(IFI), JIS, or as customer's drawing4Size:M3-M64 , 1/8-3 ... quality.Other Products: High Quality Environmental Brass Inserts, Brass Insert Nut