... .Standard:ANSI,ASME,DIN,BS,NEF,JIS,GB 2.Size:M3-M76 3.Finish:plain,zinc,black,nickel,chrome,etc flat washers1 ... .Standard:ANSI,ASME,DIN,BS,NEF,JIS,GB2.Size:M3-M763.Surface Treatment:plain,zinc,black,nickel,chrome,etc4.Package ... quality:with more than ten years experience in producing flat washer,we try our best to improve our quality,and we ...