A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5925-00-494-4685
NSN 5999-00-529-0157
NSN 5998-00-960-8513
NSN 5945-01-419-1914
NSN 5915-00-549-1098
NSN 6220-00-194-3827
NSN 6685-00-217-9010
NSN 6620-01-578-1984
NSN 6130-01-069-8841
NSN 5920-01-320-3953
NSN 6620-01-430-7104
NSN 2925-01-294-0585