Abstract: A locking fastener (14) includes a threaded bolt (16) and a nut assembly (26) comprising a torque nut (28) and a lock nut (30). The lock nut (30) is threadably received on the bolt (16) and is shiftable to a locked condition in which the lock nut thread axis (76) is misaligned relative to the bolt thread axis (24) so as to restrict rotation of the lock nut (30) relative to the bolt (16). Such misalignment is achieved by cam surfaces (48,72) defined on the torque nut (28) and the lock nut (30), wherein the cam surfaces (48,72) cooperatively shift the lock nut (30) to the locked condition when the nuts (28,30) are moved relative to one another.