On my bike, the bushings were also worn out.
New bushings are .040 thick.
Mine were at .033 and I could feel a "pop" through the bars when I braked hard. That was the tube and stanchion not remaining concentric to each other.
After I replaced the bushings, the "pop" went away.
I wouldn't worry that much about it, I think my bike had 60k on it when I finally pulled it apart. If yours has less miles, it's probably fine.
If you already have calipers and you are taking the forks apart, might as well check it--will take all of 2 minutes.