Bolt, Nut manufacturer / supplier in China, offering Durable Colorful Alloy Steel DIN 934 PTFE Coated Heavy Hex Nut Hexagon Bolt Nuts, Hot-Selling Carbon Steel PTFE Hexagonal Nut PTFE Anti-Corrosion Coating, High-Strength Blue Heavy Hex Nuts (ANSI/ASME B 18.2.2, ASTM A194 2H) and so on.