Roofing Screw, Drywall Screw, Blind Rivet manufacturer / supplier in China, offering Grade C1015~C1018 Nelson Stud Bolt Stock Shear Connector Shear Welding Stud, Shear Nelson Bolt Connection in Composite Bridge Beams Shear Bolt Weld Stud, Welding Nelson Stud with Ceramic Flux Shear Stud and so on.