Four directions self -locking nut and use locking Assembly of this nut

The utility model provides a four directions self -locking nut and use locking Assembly of this nut, cubic self -locking nut include the nut body who is the square, the last screw hole that is provided with of nut body, threaded hole internal thread's thread with the tooth form side of one side by the root of thread side that lies in the root of thread with lie in the crest with the root of thread side between the crest side forms, the contained angle of the axis of root of thread side and screw hole is lighter than to the side of the crest and the contained angle of the axis of screw hole. The utility model has the advantages of it does not have the root of thread side and only wants big during the crest side to compare with the contained angle of the axis of screw hole with the normal force of the crest department of the contacting production of the external screw thread of bolt in root of thread side, and the anti -loosing friction who consequently produces is bigger for the cooperation is closely difficul