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 5996-01-354-9386
NSN 5905-01-605-7465
NSN 4140-00-356-1979
NSN 5935-01-028-1369
NSN 5950-00-847-7958
NSN 5920-01-026-2559
NSN 5895-01-407-4213
NSN 5905-00-804-6823
NSN 6320-01-521-0377
NSN 5915-01-601-3697
NSN 6110-01-526-7739
NSN 5996-00-775-3786