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 5996-01-387-7281
NSN 5945-00-081-1338
NSN 5975-01-062-2174
NSN 6685-01-486-1568
NSN 5998-01-010-0878
NSN 6135-01-347-0201
NSN 4140-01-442-6442
NSN 6130-01-367-7138
NSN 6135-01-027-7543
NSN 5950-01-445-5586
NSN 6240-01-338-9400
NSN 5895-00-138-9683