Although China Nut may seem inconspicuous, it actually plays a big role. Compared with ordinary nuts, there is a ring of special engineering plastic inside the thread of the lock nut. It can be attached to the thread to make the internal and external threads of the nut squeeze the engineering plastic during the tightening process, thereby producing a stronger The reaction force, in this way, can greatly enhance the friction between the internal and external threads, thereby providing a great resistance to vibration. The general nut anti-retraction friction force is related to the tightening pressure between the internal and external threads. What it relies on is actually the friction generated by the pressure that comes after the screw is tightened, so as to prevent the return, but when the screw is slightly loose When the pressure is reduced, the anti-returning effect will be quickly lost. Bolt Factory's locknut fully solves this problem, and thus has a strong anti-loose ability.