A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5990-01-264-9759
NSN 5925-01-198-9910
NSN 5905-01-583-6500
NSN 6320-01-132-2746
NSN 6685-01-587-5948
NSN 5910-01-346-0771
NSN 5910-01-320-3950
NSN 5895-00-052-6192
NSN 5965-01-215-0993
NSN 5945-00-829-4505
NSN 5855-01-359-8592
NSN 6135-01-536-4810