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 5998-01-254-8642
NSN 6135-01-382-1980
NSN 7035-01-230-0250
NSN 5990-01-388-9264
NSN 6150-01-334-0050
NSN 5910-01-435-4847
NSN 6130-00-549-2607
NSN 2925-00-070-4576
NSN 5895-01-341-4312
NSN 6610-01-534-2147
NSN 5930-01-197-7372
NSN 5945-00-991-8703