1. Use two same nuts to screw on the same bolt, and add a tightening torque between the two nuts to make the bolt connection reliable.
2. Drill through threaded holes from the outer surface of the nut to the inner thread surface (usually two, distributed at 90 on the outer surface), which are used to screw in small-diameter countersunk screws. The purpose is to apply a thread to the thread. The centripetal force prevents the lock nut from loosening. At present, the lock nuts with better quality on the market are inlaid on the inner surface of the nut with a copper piece consistent with the thread of the lock nut, which is used to prevent the radial jacking screw from directly contacting the locked thread and causing damage. By.
3. A special lock nut needs to be used together with a lock washer. The special lock nut is not a hexagonal nut, but a middle round nut. There are 3, 4, 6 or 8 notches on the circumference of the nut (depending on the size of the nut and the product series of the manufacturer). Several notches are not only the focus of the tightening tool, but also the entry point of the locking washer.
