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 5985-01-168-9636
NSN 6135-00-715-4001
NSN 6130-01-449-1458
NSN 6620-01-316-7907
NSN 5895-01-584-8498
NSN 6220-00-412-2741
NSN 5835-01-213-0833
NSN 6685-00-203-4485
NSN 5920-01-500-1880
NSN 5990-00-934-3145
NSN 5935-01-281-2513
NSN 5935-01-487-5161