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 6320-01-170-4068
NSN 5965-01-245-1552
NSN 6135-01-530-8136
NSN 5925-01-221-1669
NSN 6645-01-100-3296
NSN 6685-01-247-4881
NSN 5996-00-938-8805
NSN 4140-00-027-5150
NSN 6685-00-506-0090
NSN 5950-01-223-9021
NSN 5895-01-446-7850
NSN 5915-01-530-1629