Stud Bolt and Nut, Copper Pipe Tube, Spiral Wound Gasket manufacturer / supplier in China, offering Aorrosion Resistant Alloy 20 Bolt for Hydrometallurgy and Sulfuric Acid Industry, Hastelloy C22 Resistance Pitting, Crevice and Stress Corrosion Cracking Hex Head Bolt, Aorrosion Resistant Alloy 20 Nut for Hydrometallurgy and Sulfuric Acid Industry and so on.