A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5895-01-020-5377
NSN 5945-00-636-9813
NSN 5998-01-444-3310
NSN 6685-00-651-4459
NSN 6150-01-034-7686
NSN 5945-00-078-6003
NSN 7035-00-361-5975
NSN 5915-01-345-7847
NSN 6650-01-152-9425
NSN 6685-01-124-4362
NSN 6685-01-546-2745
NSN 6145-01-169-4584