washer .Material:carbon steel,stainless steel .Finish:zinc plated .Size:all kinds 1.NameSpring lock Washer2. ... USS or SAE, DIN, JIS, ISO, AS,BS,etc3.Materialcarbon steel,Stainless Steel4.Finishzinc plated(Cr,3+);zinc plated(Cr,6 ... .Packing By carbon, then by pallet;9.Delivery stamping fastener of carbon steel spring lock washer