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 5975-01-434-9054
NSN 6150-00-011-8938
NSN 6220-00-395-5225
NSN 5905-01-469-0541
NSN 6110-01-224-8495
NSN 6110-01-233-8895
NSN 5999-01-518-0355
NSN 6320-00-186-6452
NSN 5999-00-798-5653
NSN 6240-00-076-2752
NSN 5990-01-107-1003
NSN 6645-01-211-6502