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 6650-01-067-8946
NSN 5855-01-432-2487
NSN 6135-00-223-9563
NSN 6240-01-286-3200
NSN 6220-01-030-7338
NSN 5960-00-281-0824
NSN 6135-01-299-7252
NSN 5855-00-997-6225
NSN 5835-00-170-5238
NSN 6645-01-297-2081
NSN 5990-01-582-1977
NSN 6110-00-054-7278