... 1)Size: M1.2-M64,0#-3" 2) Material: RoHS brass,copper,bronze, etc 3)Standard: GB,DIN,BS,ISO,ANSI(IFI ... :Bolt, Nut, Screw, Washer, Nails, Rivet, Insert, Brass fitting,Threaded rod, etc.2Matrrial: Copper, Bronze, Brass, Stainless steel, Aluminum, Grade.12.9 steel3Standard :GB ... , so you can trust our product quality.Other Products: environmental brass double spring washer