... " 3.Grade: SAE,USS,F436 4.Material:Carbon steel,Stainless steel Specification of our washer: 1.NameDIN9021 Stainless steel flat washers 2.StandardDIN, IFI, ISO, JIS ... , AS,BS, EN, SAE,ASTM3.GradeSAE,USS,F4364.MaterialCarbon steel(Q235,#1035,#1045), Stainless steel ...