Iron tower theftproof bolt

The utility model relates to an iron tower theftproof bolt, including the screw, the screw thread is joined in marriage and is equipped with cylindric nut on the screw on the lateral wall of cylindric nut, centre of a circle symmetry system has a plurality of axial V -arrangement recesses, in the top of cylindric nut, joins in marriage with the screw thread and is equipped with the nut safety cover, and the nut safety cover adopts concave structures down, and the lower part recess holds the nut wherein, a plurality of axial V -arrangement recesses are three V -arrangement recesses at even interval 120 degrees, and every V -arrangement recess angle of release is 60 degrees - 70 degrees, and the depth of groove is the radial 15R -14R of nut. The utility model has the advantages of fixed facility saw is constantly torn open motionlessly, the utility model discloses simple structure is practical, and simple to operate is suitable for the popularization, has solved the stolen problem of equipment from the source.