... Grade: SAE,USS,F436 4.Material:Carbon steel,Stainless steel Specification of our washer: 1.NameDIN9021 Stainless steel flat washers 2.StandardDIN, IFI, ISO ... USS,F4364.MaterialCarbon steel(Q235,#1035,#1045), Stainless steel(303,304,304L,316,316L),Brass(H59,H62)5.Size2.7"-39 ... USS,F4364.MaterialCarbon steel(Q235,#1035,#1045), Stainless steel(303,304,304L,316,316L),Brass(H59,H62)5.FinishPlain, Zinc plated ...