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 6145-01-261-1940
NSN 5998-00-033-9692
NSN 5895-01-360-1392
NSN 6685-00-827-1743
NSN 6240-01-105-1399
NSN 5965-01-189-4805
NSN 5950-00-192-2592
NSN 5915-00-051-2181
NSN 5990-01-605-4769
NSN 6150-00-972-9949
NSN 2925-01-459-8093
NSN 6135-01-435-8451