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 6645-00-881-9978
NSN 5905-01-320-2491
NSN 5950-00-529-0599
NSN 6110-01-600-1223
NSN 5905-00-526-0753
NSN 6150-01-400-4211
NSN 5960-01-249-2602
NSN 5905-01-419-6768
NSN 6220-01-433-4318
NSN 5835-00-941-4959
NSN 5935-01-372-0926
NSN 6685-00-060-3104