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 6110-01-538-2789
NSN 5996-00-499-1438
NSN 6685-01-528-5316
NSN 5935-00-071-1494
NSN 6650-01-207-0829
NSN 6110-01-029-3403
NSN 5998-01-187-6000
NSN 5930-01-337-0840
NSN 5965-01-187-0941
NSN 6150-01-322-5953
NSN 5905-01-110-7340
NSN 5960-00-940-7976