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 5960-00-581-9719
NSN 5996-00-426-7370
NSN 5855-00-433-2377
NSN 5925-00-973-1160
NSN 5975-00-209-1428
NSN 4140-01-210-2212
NSN 5905-00-175-9191
NSN 6110-01-633-9660
NSN 6110-01-265-8720
NSN 6135-01-496-2352
NSN 5855-01-463-7372
NSN 5950-01-272-4658