Galvanized flat head drywall screws; OEM from China; Certification:ISO14001:2004 ISO9001 ... client's requiresCoating/Surface treatmentZinc,Tin,Sn/Pb,Nickel,Chrome,Titanium, Cadmium, Dacromet,Heat dipzinc, Chromate ,Electro Painting ... square washer, bowl washer.Screws: machine screws, self tapping screws, self drilling screws, set screws, hex socket head cap screws, wood screws.Rivet: solid rivet, blind ...