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 5996-01-487-3733
NSN 5835-01-390-4667
NSN 5920-01-655-1941
NSN 7035-00-104-7613
NSN 6110-01-381-1269
NSN 5998-01-303-6937
NSN 5985-01-400-5948
NSN 6145-01-034-8201
NSN 4140-01-429-9060
NSN 6320-00-809-5744
NSN 6685-01-520-4684
NSN 6620-01-587-1088