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 5990-01-463-2279
NSN 5895-01-468-9786
NSN 5920-01-556-3321
NSN 6105-01-476-4661
NSN 5990-00-407-4473
NSN 5985-01-524-4512
NSN 6620-00-266-2763
NSN 5945-01-091-5130
NSN 6105-01-345-0524
NSN 6320-01-497-3116
NSN 6610-01-567-7242
NSN 5960-01-444-2205