A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6150-00-199-8764
NSN 5950-00-766-1967
NSN 5895-01-038-2252
NSN 2925-00-468-5273
NSN 5945-00-170-5885
NSN 6645-01-025-1002
NSN 6220-00-211-6146
NSN 5996-00-983-7884
NSN 5975-00-476-9657
NSN 4140-01-218-5919
NSN 5975-01-371-3051
NSN 5905-00-450-0907