Locking fastener

A locking fastener comprising:

• a main body having a first axially directed surface and a second axially directed surface, where both the first axially directed surface and the second axially directed surface surround an axis, the first axially directed surface facing inward toward the axis and the second axially directed surface facing away from the axis;
• a top surface extending between the first axially directed surface and the second axially directed surface at a first end of the main body;
• a bottom surface extending between the first axially directed surface and the second axially directed surface at a second end of the main body;
• at least one threaded surface on the main body, the at least one threaded surface having a plurality of substantially axially directed threads;
• at least one slot in the main body, the at least one slot extending from the first axially directed surface to the second axially directed surface, a first portion of the at least one threaded surface located above the at least one slot and a second portion of the at least one threaded surface located below the at least one slot;
• a locking recess formed in the main body, the locking recess extending substantially parallel to the axis and extending through or to the at least one slot, the locking recess having an internal threaded surface portion;
• a locking member having an external threaded surface, the external threaded surface configured to engage the internal threaded surface portion of the locking recess;
• wherein the locking member passes axially through the locking recess and the at least one slot and a tightening of the locking member results in a relative axial movement between the first portion of the at least one threaded surface and the second portion of the at least one threaded surface, and this relative axial movement locks the locking fastener.