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 6240-00-612-0883
NSN 5905-01-226-6856
NSN 5910-01-571-6114
NSN 6650-00-945-9105
NSN 5945-00-828-3942
NSN 2925-01-118-6125
NSN 6150-00-534-3762
NSN 6130-01-559-8397
NSN 5960-00-328-4058
NSN 5960-01-119-1288
NSN 2925-01-389-3726
NSN 6620-00-955-6122