A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5965-01-620-2205
NSN 6645-01-143-0137
NSN 6685-00-893-0111
NSN 5855-00-455-6070
NSN 5920-01-258-4990
NSN 6150-00-966-9168
NSN 6320-01-452-2394
NSN 4140-01-025-1555
NSN 5915-01-503-6985
NSN 2925-01-213-2983
NSN 5895-00-755-2416
NSN 2925-00-211-4469