Adjustable nut

The invention discloses an adjustable nut. The adjustable nut comprises a threaded sleeve, a blind hole formed in the center of the threaded sleeve and a nut body arranged in the blind hole, an internally-tangent annular groove is formed in the inner wall of the blind hole, two arc-shaped convex edge parts are arranged at the top end of the annular groove, rectangular notches are formed in the twoends of each convex edge part correspondingly, the outer wall of the nut body is provided with a double-lug supporting plate corresponding to the rectangular notch, limiting holes are formed in the front end and the rear end of the convex edge part correspondingly, a radial linear groove is formed between the two limiting holes, and set screws are placed in the limiting holes and are national standard parts. According to the adjustable nut, the double-lug supporting plate is limited through the set screw to prevent the nut from being disengaged from the threaded sleeve, the problem of threaded connection hole positio