Abstract: A locking nut comprising at least two nut portions and at least one frangible bridging portion and a method of making a locking nut. The nut portions are made from a single nut. Each nut portion has an outer gripping surface and a centrally disposed threaded aperture for receiving and engaging a screw. The bridging portion is integral with the nut portions and is disposed to a side of the aperture adjacent to the gripping surface. The nut portions are disposed on either side of the bridging portion so that the apertures are axially aligned, the threads are aligned and a space is defined between opposing faces of the nut portions. By applying torque to one of the nut portions relative to the other nut portion, the bridging portion is sheared and opposing faces of the nut portions are brought into contact and the nut portions are locked in place.