A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6220-01-189-4922
NSN 6130-01-384-4391
NSN 6645-01-227-2036
NSN 6650-01-628-3745
NSN 5975-01-100-3222
NSN 5920-01-076-4634
NSN 7035-00-215-3272
NSN 5895-01-178-0523
NSN 5999-01-625-6075
NSN 6110-01-012-4710
NSN 6620-00-943-7899
NSN 6685-00-418-5960