A nonmetallic unthreaded item generally round in cross-sectional shape which, when placed on/in a machined-out portion of the threads of a screw or bolt, or inserted into the machined-out portion of the threads of a nut, locks the item, to which it is fixed, to the attached mating member and prevents loosening during excessive vibration. Excludes bolt, self-locking; nut, self-locking (as modified); screw, self-locking; and insert, screw thread.
NSN 5998-01-412-2628
NSN 6320-01-454-1965
NSN 6150-01-148-4626
NSN 5915-00-291-3736
NSN 6220-00-983-6920
NSN 5905-00-646-4457
NSN 5915-00-365-9951
NSN 6110-00-011-3711
NSN 6320-01-452-2394
NSN 6620-00-663-8962
NSN 5895-00-370-3418
NSN 6650-00-003-5413