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 5998-00-820-5818
NSN 5855-01-359-8592
NSN 5960-00-256-3622
NSN 5945-01-586-4329
NSN 6645-01-239-2348
NSN 5895-00-399-5693
NSN 5915-00-806-2930
NSN 5998-01-196-6131
NSN 5996-01-138-0281
NSN 5930-01-301-6525
NSN 5915-01-153-2084
NSN 5930-01-262-8179