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 5930-01-311-3215
NSN 6110-00-845-4871
NSN 5996-01-532-0536
NSN 5990-01-604-0060
NSN 5935-01-506-0469
NSN 5950-00-452-2273
NSN 5990-01-522-6096
NSN 6220-00-146-3226
NSN 5990-00-402-7721
NSN 5975-01-325-5388
NSN 6130-00-951-2942
NSN 6220-01-496-1925