A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 2925-01-279-1558
NSN 5855-01-225-5855
NSN 2925-00-233-5644
NSN 5910-01-481-4621
NSN 5930-01-420-6529
NSN 6685-01-272-1868
NSN 6320-01-116-3980
NSN 5835-01-303-6563
NSN 6320-00-646-3311
NSN 5998-01-251-3064
NSN 5996-00-278-5193
NSN 6685-01-267-1861