China Slotted hex nuts Manufacturers, Suppliers, Factory

In 2026, digitalization, intelligence, and green development have become the three core driving forces of the global fastener industry. Intelligent manufacturing improves product consistency, quality stability, and production efficiency, providing safer and more reliable fastening solutions for engineering, construction, energy, and machinery worldwide. Ningbo Gangtong Zheli Fasteners will continue to promote intelligent upgrading, strengthen quality control, and provide global customers with high‑standard, high‑performance, and highly reliable fastener products. We believe that technological innovation will lead the industry to a more efficient, stable, and sustainable future.

A thick zinc layer is formed on the surface of the bolt, providing long-term corrosion protection, suitable for outdoor and humid environments.

From the name, high-strength bolts can usually withstand greater loads than ordinary bolts of the same specification.

Galvanized High Tensile Double End Stud Bolt covers complete metric specifications from M6 to M64, and supports customized production of non-standard lengths according to pipeline design drawings provided by engineering buyers

Stud bolts are threaded fasteners designed for high-pressure and high-temperature applications, commonly used in flanged connections for pipelines, valves, and pressure vessels. ZHELI's bolts consist of a fully threaded rod, often paired with two heavy hex nuts to secure flanges tightly.

Bi-metal Screw is a type of screw that is made up of two different metal types. Usually, one metal type is used for the screw's body while the other is used for its head. The use of two different types of metal makes bi-metal screws more durable, allowing them to withstand higher pressure and heavier loads.