Screws, Nails, Rivets manufacturer / supplier in China, offering Metric Dia M5 - M56 Lengths 10mm - 800mm Class 8.8, 10.9, 12.9 Hex Bolts, Metric Coarse Fine Carbon Steel Hex Bolt for Machinery Fabrication Construction Applications, Carbon Steel Metric Class 8.8, 10.9 Plain Zinc Plated Hex Bolt and so on.