A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6135-00-269-5843
NSN 5960-01-447-1154
NSN 5925-01-379-5348
NSN 5925-00-005-3694
NSN 5935-00-826-7190
NSN 5945-00-859-2839
NSN 6105-01-349-1558
NSN 6110-00-034-3710
NSN 6645-01-092-4733
NSN 6610-00-764-4015
NSN 6650-01-388-2538
NSN 6610-01-186-6535