... Stainless steel Specification of our washer: 1.NameZinc plated cup washer 2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE,ASTM3.GradeSAE ... ,316,316L),Brass(H59,H62)5.SizeM6-M206.FinishPlain, Zinc plated,Passivated, Nickle plated, H.D.G., Black Oxided, Dacromet,Geomet,etc7. ... washer, Square washer,Dished washer,Bevel washer,etc2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE, ASTM3.GradeSAE,USS,F4364. ...