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 5990-01-094-7740
NSN 5985-01-406-5744
NSN 5998-01-360-9469
NSN 5965-01-013-0290
NSN 5945-01-003-8106
NSN 6685-01-189-8225
NSN 5996-01-356-2203
NSN 6320-01-283-1300
NSN 5835-01-468-0579
NSN 6240-01-577-6745
NSN 5925-00-462-7481
NSN 6150-01-333-7247