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Bolt fasteners can be used to provide control of the attachment force but they are not typically viewed as providing a locking attachment unless they are torqued to a prescribed percentage of the yield strength of the bolt. Adhesives are often used as an alternative means of locking threaded bolts, but adhesives are not well suited to inspection, removal or replacement, nor are they well suited for use in the space environment. Enter the Threaded Pin-Lock Retaining Ring system. It comprises a retaining ring, a structural component, the component being retained, and the pin-lock mechanism. The threaded interfaces allow for components being retained to be clamped between the retaining ring and the structural component. The pin-lock mechanism may be designed specifically for a given application and can be applied to both male and female threaded applications. The Threaded Pin-Lock Retaining Ring is configured for applications having precision torque requirements, and could be applied to any system with axially rotating components such as those commonly found in aerospace, automotive, cycling, energy sector, imaging, manufacturing, maritime, and robotics industries.