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 6650-01-082-9773
NSN 6320-00-225-7013
NSN 6240-00-983-6761
NSN 5905-00-946-4202
NSN 5965-01-340-3723
NSN 5835-01-160-7282
NSN 6110-01-421-2714
NSN 5996-00-689-7645
NSN 6645-01-605-8796
NSN 6650-00-489-7197
NSN 6110-01-318-4512
NSN 5945-00-552-4021