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 5999-01-273-0151
NSN 6650-00-587-6917
NSN 5950-01-230-1492
NSN 6220-01-613-7368
NSN 5930-01-183-9248
NSN 5920-00-161-2813
NSN 5950-00-140-9696
NSN 5945-01-419-4630
NSN 6650-01-651-9502
NSN 5996-01-032-5926
NSN 4140-01-358-3417
NSN 6130-00-596-9565