A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-00-637-8553
NSN 6105-00-917-9869
NSN 6320-00-823-2015
NSN 5999-00-406-5088
NSN 5915-00-965-0535
NSN 5999-00-244-6375
NSN 4140-01-314-4697
NSN 2925-01-142-0981
NSN 5910-01-172-5659
NSN 6150-01-623-4364
NSN 6130-01-019-8317
NSN 7035-01-391-7470