name: screw materiall: carbon steel, alloy steel, stainless steel, copper certification: ISO9001:2008 Descripion Item nameScrewMaterials carbon steel, alloy steel, stainless steel, copper,etcShapeCustomizedDimensionsAllSurface treatment Chrome plating, Silver plating, Zinc plating, Nickel plating, Tin-plating, Passivate, etcCertification ISO 9001:2008 Features High precision and durable Payment & ...