A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5855-01-325-9507
NSN 5925-00-290-4451
NSN 5999-01-444-1791
NSN 5920-00-661-0840
NSN 5895-01-053-1691
NSN 6110-00-226-3148
NSN 5895-01-085-6950
NSN 5920-01-381-9310
NSN 6105-01-378-1430
NSN 5835-01-193-0391
NSN 5965-01-514-6933
NSN 5965-00-421-6459