Screws, Nails, Rivets manufacturer / supplier in China, offering DIN7504K 4.8mm 5.5mm Hex Hexagonal Thickness Head Zinc Plated Roofing Drilling Screw for Korean Market, #14 X 1" (3/4" to 3") Hex Washer Head Self Drilling Sheet Metal Tek Screws for Korean Market, Zinc Plated #12 Hexagona Thickness Head Hex Self Drilling Screw Used Korean Market and so on.