A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5965-01-143-9577
NSN 6220-01-054-4926
NSN 5930-01-270-4051
NSN 5950-01-233-4100
NSN 5999-01-541-4767
NSN 6105-01-303-7027
NSN 6320-00-925-0558
NSN 2925-01-535-3167
NSN 6130-01-626-6069
NSN 5915-01-243-6682
NSN 6620-01-440-5585
NSN 6135-01-562-6582