No other part numbers with same form, fit, and function found.
A locking device with two keys spaced approximately 180 degrees center to center and protruding from the seating surface of the ring. When installed the keys mate with companion keyways in the external threads of screw thread inserts, locked-in studs, or similar type items, and cut through sufficient threads of the parent material tapped hole to provide a positive lock between the threaded bodies.
NSN 5975-00-156-0416
NSN 6150-01-226-4074
NSN 6105-00-538-9358
NSN 5930-01-265-6888
NSN 5998-01-652-9988
NSN 6240-00-782-5991
NSN 5915-01-089-7930
NSN 5930-00-315-0403
NSN 5975-01-217-6922
NSN 6220-00-269-3783
NSN 5996-01-223-4665
NSN 6135-01-159-9705