A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-00-111-3208
NSN 6620-00-350-1050
NSN 6220-01-605-1346
NSN 6650-01-425-2572
NSN 6320-00-331-7138
NSN 6685-01-547-4506
NSN 5835-00-825-2512
NSN 6685-00-290-8195
NSN 6685-01-610-6230
NSN 5935-01-295-9922
NSN 5998-00-951-9120
NSN 5935-01-628-1345