A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5996-01-037-5778
NSN 5945-01-025-5956
NSN 5950-00-597-3661
NSN 6150-00-159-4347
NSN 6135-01-453-5069
NSN 5950-00-195-5604
NSN 7035-01-138-5781
NSN 6240-01-146-4839
NSN 6645-01-211-6502
NSN 5835-01-555-8963
NSN 6645-00-456-7653
NSN 5925-01-384-3402