A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5935-01-123-4313
NSN 5910-01-469-5989
NSN 5855-01-541-1361
NSN 6135-00-802-5479
NSN 5965-00-236-0016
NSN 6110-01-496-6975
NSN 2925-00-444-1186
NSN 4140-01-534-6960
NSN 6135-00-284-1406
NSN 5915-01-110-1043
NSN 6645-01-399-3487
NSN 4140-01-512-6049