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 5905-01-112-0084
NSN 6650-00-486-7924
NSN 5996-01-064-6969
NSN 5855-00-832-9341
NSN 5925-00-775-3614
NSN 5905-01-164-8482
NSN 5935-01-121-1427
NSN 5835-01-497-5029
NSN 5960-00-789-4474
NSN 5975-00-500-0166
NSN 5905-00-339-2837
NSN 4140-00-240-1848