Anti-theft nut for transmissine line

The utility model discloses an anti-theft nut used on a transmission line, comprising a nut body, a movable steel column, a rubber fixed ring and a labeling seal paper. The internal thread point of the nut body is processed with an inclined slot, and the movable steel column is arranged in the inclined slot. The rubber fixed ring is sheathed at the central position of the inner bore of the nut body, the movable steel column is fixed in the inclined slot, and the labeling seal paper is adhered at the corresponding side of the inclined slot of the nut body. The utility model has artful design, simple structure, stable and reliable anti-loosing and anti-theft performances, which is an anti-theft device on the basis of the existing pylon galvanizing standard bolts and nuts. The utility model can be directly mounted and used on new or existing working lines and can not create any contradictory with the original pylon design of the lines, which can not create other unnecessary troubles and errors. The utility model has the advantages of good antitheft performance, convenient installation and construction, low cost, etc.