Thread rolling of self-tapping screws

(thread-rolling self-tapping screw)-Triangle self-tapping screw, also known as type (Thai type is still patented), is developed according to the principle of forming tapping. The thread-rolling self-tapping screw has a specially designed thread and tail end, so that the screw can roll itself into the matching internal thread under intermittent pressure. At the same time, the material around the hole can easily fill the space between the thread and the root of the tapping screw. Because its friction force is smaller than that of threaded self-tapping screws, it can be used in thicker materials, the torque required for rotation is better controlled, and the combined strength is higher. The engineering standard definition of thread-rolling self-tapping screws in terms of materials, heat treatment and strength is higher and clearer than that of forming or cutting self-tapping screws, which makes thread-rolling self-tapping screws a real "structural" fastener.