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 5998-00-155-8531
NSN 5985-00-932-5333
NSN 5996-01-254-3892
NSN 2925-01-617-6302
NSN 5915-01-081-0406
NSN 5895-01-257-3641
NSN 5998-01-091-9359
NSN 6240-01-097-2831
NSN 5835-01-595-1131
NSN 6620-01-481-0637
NSN 5990-00-201-1162
NSN 6130-01-058-6929