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 6145-01-449-0905
NSN 6110-01-310-8983
NSN 5905-01-537-4497
NSN 7035-00-312-3055
NSN 5960-01-552-8601
NSN 5905-01-537-8473
NSN 5930-01-117-6343
NSN 5960-00-553-5792
NSN 4140-00-248-6089
NSN 6240-01-498-3168
NSN 5999-01-025-6686
NSN 5930-01-146-4489