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 5920-01-366-5991
NSN 5925-01-177-3177
NSN 7035-01-176-7523
NSN 5930-01-515-0658
NSN 5915-00-021-7106
NSN 5990-01-213-6319
NSN 5950-00-891-9166
NSN 6240-01-384-3887
NSN 5930-00-401-8374
NSN 5930-01-532-8288
NSN 6685-00-398-9840
NSN 4140-01-336-2863