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 4140-00-113-8215
NSN 5950-01-632-7956
NSN 6220-01-312-2035
NSN 6130-00-518-4305
NSN 6145-01-451-3594
NSN 6685-00-857-1891
NSN 6610-01-032-5335
NSN 6685-00-421-5420
NSN 5945-01-598-7595
NSN 5915-01-084-5302
NSN 2925-01-325-2490
NSN 7035-01-419-4317