... 2.Fastener screw, 3.hardwere screw, ball screw 4.Screw bolt and nut 5.Standard: JIS, BS, DIN, AISI. Product ... :1) Meterials: carbon steel, stainless steel, metal, brass, copper, zinc alloy, cold rolled steel with various plating 2) Head style ... wafer, hinge, binding, button, truss3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen ...