A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-00-303-4955
NSN 5960-01-111-5142
NSN 6685-01-379-6191
NSN 6645-01-329-2363
NSN 5855-00-337-3679
NSN 5945-00-921-4267
NSN 6650-00-166-7160
NSN 6320-01-177-3192
NSN 6240-01-529-6624
NSN 5945-01-497-8125
NSN 6650-01-159-0224
NSN 5855-00-132-4898