Stud Bolt and Nut, Copper Pipe Tube, Spiral Wound Gasket manufacturer / supplier in China, offering High Pressure Metal Sealing Ring Joint Gasket for B16.5 Flange, NF Nc22dnb Inconel 625 Bolt and Nut with Excellent Corrosion Resistance, DIN W. Nr. 2.4668 Nicr19fe19nb5mo3 Stud Bolt with Excellent Creep and Stress Rupture Strength and so on.