1)Cup washer/metal washer 2)Material:Steel 3)Standard:DIN,ANSI,BS,JIS,GB 4)Size:M3-M76 5)Finish:Plain,Zinc,Black ... , BS, IFI, JIS, ISO,GB,ANSI,ASME,Non-Standard 3) Size: M3–M76 4) Finish: Zinc, Black, Nickel-plating, Tin-plating ... bag,box,then pack on pallet 7)Accept custom made screw cup washer