Lock nut for high-strength bolt

The locknut for the high-strength bolt comprises a nut body and is characterized in that a groove is formed in the inner side of the side wall of the nut, and a screw hole penetrating through the outer side wall of the nut is formed in the bottom of the groove; a pressing assembly which does not protrude out of the inner wall of the nut is arranged in the groove. A jacking screw for adjusting the position of the pressing assembly towards the inner side wall of the nut is arranged in the screw hole; the pressing assembly comprises a pressing block with a groove hole, a spring connected with the bottom of the groove hole and a ball connected with the free end of the spring through a sliding block. According to the locknut for the high-strength bolt, the locking effect is achieved through the pressing assembly, meanwhile, automatic reset can be achieved after a screw is loosened, due to the fact that the pressing assembly is simple and easy to install, reset of the pressing assembly is easier to achieve, and the