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 5996-01-499-9749
NSN 6110-00-146-2114
NSN 2925-00-583-9669
NSN 5999-01-089-6974
NSN 6220-01-322-0671
NSN 2925-00-712-8180
NSN 5930-01-266-2186
NSN 5925-01-023-1411
NSN 5985-01-412-2897
NSN 6130-01-380-7236
NSN 5985-00-279-9914
NSN 6645-01-580-3258