1.Name:Non-standard flat washer with small holes 2.Size: M6-M20 3. ... Specification of our washer: 1.NameNon-standard flat washer with small holes 2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE,ASTM3 ... washer, Square washer,Dished washer,Bevel washer,etc2.StandardDIN, IFI, ISO, JIS, AS,BS, EN, SAE, ASTM3.GradeSAE,USS,F4364.MaterialCarbon ...