Orthopedic implant system for variable angle locking having engineered mating thread engagement

The invention relates to an orthopedic implant system comprising an implant including a threaded aperture which receives either a first non-locking bone fastener or a second threaded variable axis locking fastener. The threaded aperture includes interruptions to form sections having a thread segment. The variable axis locking fastener has a threaded head configured to cause the threads to wedge against the female threads of the aperture as the fastener is tightened into the aperture in an off-axis orientation. In a further embodiment, the aperture includes a concentric annular groove to form flexible threaded tines.