Bolt type hexagon nut anti-loose structure

The utility model provides a bolt type hexagon nut locking structure, which belongs to the technical field of mechanical locking of hexagon nuts and comprises a threaded shaft, a hexagon nut, a locking sheet, a bolt and a locked part. One end of the threaded shaft is of a hexagonal structure, is provided with external threads on the circumference and is matched with a locked part and a hexagonal nut; a plurality of annular openings are formed in one end of the hexagonal nut, and the hexagonal nut is fastened at the hexagonal structure of the threaded shaft after being clenched and deformed; the locking sheet is mounted between the hexagonal nut and a locked part, a plurality of lugs are arranged on the circumference, the locking sheet is fastened on the surface of the hexagonal nut after being flanged, and a pin hole is formed in the circumference and matched with the bolt; the locked part is provided with a threaded inner hole in threaded connection with the threaded shaft and a pin hole allowing the plug pi