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 5990-01-089-9694
NSN 6145-01-433-2329
NSN 5915-00-147-0603
NSN 5998-01-311-9308
NSN 2925-01-282-3206
NSN 6145-01-430-2784
NSN 6145-00-811-3838
NSN 5855-01-103-8650
NSN 6620-00-411-4983
NSN 5855-01-363-7491
NSN 5905-01-188-9062
NSN 6220-01-245-0310