A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5835-01-058-5889
NSN 5930-01-032-6293
NSN 5960-01-399-4327
NSN 6130-00-113-3430
NSN 6645-01-084-5627
NSN 6105-01-537-4522
NSN 6240-01-232-8079
NSN 6110-00-724-8112
NSN 5996-01-535-0438
NSN 6320-00-681-1324
NSN 5855-00-821-7512
NSN 6240-01-444-1513