Heretofore various forms of locking type bolt and nut constructions have been designed. Various forms of these constructions are disclosed in U.S. Pat. Nos. 113,557, 3,176,746, 3,339,389, 3,477,337, and 3,517,717. However, for various reasons these previously known locking bolt and nut threaded connections have proven inefficient, at least under some working conditions.