A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-01-340-4156
NSN 6130-01-246-4154
NSN 5925-00-493-9154
NSN 6110-00-944-8607
NSN 5925-00-252-1554
NSN 5855-01-357-6877
NSN 6220-01-359-1593
NSN 5990-00-412-4411
NSN 5965-00-001-7593
NSN 5935-01-372-1598
NSN 6685-01-352-5437
NSN 5905-01-566-3694