A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-00-172-1804
NSN 5975-01-556-5462
NSN 5910-00-409-3066
NSN 6130-00-297-5793
NSN 6130-00-361-7114
NSN 5920-00-963-0140
NSN 6620-00-360-1379
NSN 4140-01-549-2952
NSN 5910-00-777-5740
NSN 6130-00-100-0175
NSN 2925-01-180-2960
NSN 6145-00-216-6613