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 7035-01-249-4547
NSN 6610-01-660-3966
NSN 6110-01-325-5670
NSN 5905-01-534-1859
NSN 5910-01-631-1673
NSN 5915-01-272-0867
NSN 6105-01-561-5071
NSN 5905-00-451-5592
NSN 2925-01-358-8346
NSN 5925-01-115-6901
NSN 5965-00-702-7257
NSN 6150-00-840-6405