A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-00-174-4652
NSN 5985-01-281-5207
NSN 5960-01-086-3416
NSN 6645-00-962-6825
NSN 2925-01-140-8957
NSN 6105-00-349-9743
NSN 6135-01-127-0173
NSN 6320-01-407-8663
NSN 5996-01-463-9480
NSN 6130-01-200-0358
NSN 5930-01-496-6281
NSN 6650-00-162-6638