A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6150-01-065-3040
NSN 6645-01-632-1127
NSN 5960-01-224-7151
NSN 6320-00-483-0451
NSN 5935-01-563-5547
NSN 5925-01-023-9116
NSN 5975-01-285-0301
NSN 5925-00-270-6005
NSN 5920-01-653-9512
NSN 5950-01-199-2761
NSN 5960-01-130-6413
NSN 6610-01-447-5598