A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-00-682-0500
NSN 5996-00-146-3726
NSN 5915-01-390-0659
NSN 5960-00-960-6805
NSN 6150-01-018-6233
NSN 5835-00-419-0575
NSN 6135-01-589-0333
NSN 6105-01-043-5351
NSN 5930-01-166-8428
NSN 5930-00-290-7340
NSN 6320-00-841-2279
NSN 6320-01-578-6006