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 2925-00-019-9649
NSN 2925-00-179-7143
NSN 6130-00-932-1591
NSN 5945-00-844-2341
NSN 6645-01-177-2766
NSN 5835-01-100-7405
NSN 5985-01-380-3724
NSN 6135-00-990-1822
NSN 6620-00-807-6954
NSN 5985-01-334-2988
NSN 5996-01-191-8758
NSN 6130-01-522-0747