Screw, Bolts, Nuts manufacturer / supplier in China, offering Grade 10.9/12.9 M16-M60 High-Strength Torsion Shear Type Bolt Steel Bolt, Hexagon Mechanical Nuts for Valves, Hex Long Nuts Long Nuts Hex Coupling Nuts Long Round Nuts Carbon Steel Zinc Plated Cr3+ DIN6334 and so on.