A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5985-00-483-0133
NSN 5905-01-013-0190
NSN 5999-00-264-4881
NSN 6620-01-298-3806
NSN 6620-01-024-1228
NSN 5975-00-159-8876
NSN 5998-00-972-2180
NSN 5960-01-061-9166
NSN 4140-01-362-7117
NSN 5935-00-436-2662
NSN 6105-00-719-9943
NSN 4140-01-492-0968