A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6240-01-394-0949
NSN 5975-01-432-2149
NSN 5945-00-261-7955
NSN 5925-00-402-7768
NSN 5945-01-144-5054
NSN 5999-01-426-7255
NSN 6105-01-310-7588
NSN 6650-01-394-8751
NSN 6130-00-985-4938
NSN 5996-01-574-6346
NSN 5975-00-226-1167
NSN 5905-01-550-5767