High-strength hexagonal flange locknut

The invention discloses a high-strength hexagonal flange locknut. The high-strength hexagonal flange locknut comprises a main nut, an auxiliary nut, compression rods, threaded holes and a limiting groove, wherein a gasket is fixed to the bottom of the main nut, the main nut is in a regular hexagonal prism shape, the auxiliary nut is arranged above the main nut, the auxiliary nut and the main nut are located on the same vertical axis, a plurality of vertically-arranged threaded holes are formed in the lower end of the auxiliary nut, openings are only formed in the lower ends of the threaded holes, a plurality of limiting grooves in one-to-one correspondence with the threaded holes are formed in the upper end of the main nut, the depth of the threaded holes is greater than that of the limiting grooves, the upper portions of the compression rods are screwed into the threaded holes, and the lower portions of the compression rods are inserted into the limiting grooves. According to the high-strength hexagonal flan