Fastener, Hex Bolt, Foundation Bolt manufacturer / supplier in China, offering M8 M10 M12 M56 Class 8 Class 10 Hot DIP Galvanized Hexagon Nut Hot DIP Zinc Nut with Hole Enlargement Thickened Heavy Hex Nut, Screw Manufacturer Insulation Hexagon Nut Bolt Protection Cover M12m16 Dust and Rust Proof Color Protective Sleeve, Square Nut Carbon Steel M3 Thread Zinc & Nickel Plated En & ASTM Certified Thin Nut Stainless Steel DIN934 and so on.