A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-00-209-5778
NSN 5996-01-227-0767
NSN 6650-00-349-8732
NSN 5965-00-622-7025
NSN 5925-01-460-7758
NSN 2925-01-457-5649
NSN 5910-00-938-8750
NSN 5960-01-284-1642
NSN 5920-01-499-0026
NSN 6110-00-816-9715
NSN 6110-01-042-4117
NSN 6685-00-146-2308