Stud Bolt and Nut, Copper Pipe Tube, Spiral Wound Gasket manufacturer / supplier in China, offering ANSI B16.21 Non-Metallic Asbestos Free Flat Gasket for Petrochemical Industry, Monel/CS/304/304L/316/316L/321/347 Outer Ring Graphite Filler Spiral Wound Gasket for Industry, Fluoropolymer Coating Class 600lb/900lb/1500lb/2500lb Oval Ring Gasket for Flange and so on.