... tooth lock washer,metal roof screw washers,steel washer 1.ISO 9001:2008 Certified 2. ... internal tooth lock washer,metal roof screw washers,steel washer1.ISO 9001:2008 Certified 2.M3-M803. ... else of Washers can we supply? 1.Name:carbon steel washer2.standard:USS,SAE,FENDER, F436,DIN ( 125A ... to customers' requirements.3.Material:Carbon steel,45#,65Mn,stainless steel,brass,copper4.Finish:Plain;black; zinc ...