1. Use two same nuts to tighten the same bolt, and increase the tightening torque between the two nuts to ensure the bolt connection.
2. The lock nut should be used together with the anti-loosening washer.
3. There are multiple screw holes drilled from the outer surface of the nut to the inner thread surface (usually two screw holes, distributed in a ratio of 90), these screw holes are used to tighten small diameter countersunk screws. The centripetal force prevents the lock nut from loosening.
