A nut lock includes a nut body, a locking coil, and a cage. The locking coil includes first and second tangs and has an internal diameter that is smaller than the internal diameter of the nut body. The cage is fixed within the nut body and includes a circumferential wall defining first and second stops. The locking coil is located within the cage, and the first and second tangs are positioned proximate the first and second stops of the cage. The first tang engages the first stop when the nut lock is turned in a first direction, and the second tang engages the second stop when the nut lock is turned in a second direction.