1.Name:Non-standard flat washer with small holes 2.Size: M6-M20 3.Grade: SAE,USS,F436 4.Material:Carbon steel Specification of our washer: 1.NameNon-standard flat washer with small holes 2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE,ASTM3.GradeSAE,USS,F4364.MaterialCarbon steel(Q235,#1035,#1045), Stainless steel(303,304,304L,316,316L),Brass(H59,H62)5.SizeM6-M20 6.FinishPlain, Zinc plated, ...