A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-00-456-0404
NSN 6685-00-134-2993
NSN 5915-01-584-2404
NSN 5920-01-420-5768
NSN 5950-01-371-2095
NSN 5925-01-062-7973
NSN 6650-00-726-4242
NSN 5999-00-243-0359
NSN 5945-01-587-1072
NSN 5930-01-263-6012
NSN 5855-00-688-9954
NSN 6220-01-448-9929