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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.

Stud Bolt is a type of mechanical fastener that is threaded on both ends. It is designed to be used in the petrochemical, oil and gas, and other heavy industries. Stud bolts are commonly used in flange connections to join pipes or other machinery together. They provide a strong and secure connection that is resistant to high pressure and vibration.

The fatigue strength of bolts has always been an issue of concern. Data show that most of the failure of bolts is caused by fatigue damage, and there is almost no sign of fatigue damage, so major accidents can easily occur when fatigue damage occurs. Heat treatment can optimize the performance of fastener materials and improve their fatigue strength. In view of the increasingly high use requirements of high-strength bolts, it is even more important to improve the fatigue strength of bolt materials through heat treatment.

The roof hook is a true all-purpose tool for outdoor adventures. It looks like a piece of metal with a hook, but don't underestimate it. One of the biggest frustrations of outdoor adventures is finding a place to hang your gear, leaving the tent cluttered and messy. This is where the roof hook comes in handy. For example, when camping on a rock face, use it to hang your backpack, headlamp, and even water bottle, saving space and keeping moisture out.

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.

The most straightforward answer is that a self tapping screw creates its own thread, eliminating a crucial, time-consuming step. But the real reasons go much deeper, and that’s what we’ll explore today. Let’s talk about why this little innovation is such a big deal.