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 5895-01-538-0052
NSN 6620-01-277-3947
NSN 6610-01-125-0776
NSN 6220-01-192-1908
NSN 5996-00-111-3379
NSN 5935-01-422-1700
NSN 6150-00-382-6018
NSN 5905-00-317-8759
NSN 4140-00-518-2744
NSN 6650-01-315-2922
NSN 5855-00-411-8688
NSN 5905-00-363-9689