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 5960-01-641-5493
NSN 5985-01-227-1919
NSN 5945-01-037-0086
NSN 6320-00-483-0451
NSN 6110-01-278-8325
NSN 6220-01-488-3247
NSN 6645-01-605-4351
NSN 2925-01-015-2354
NSN 6130-01-212-3035
NSN 6645-01-100-3296
NSN 5999-00-189-0772
NSN 6620-01-328-7059