[IndySam]

Originally Posted by BJC

Nope, we just use a deburring tool or ream them out to make them a little bigger after they are waterjetted. I agree that they wouldn't fit unless you make the hole bigger.

Exactly or even a little emery paper does the trick. On thicker materials we note which side is tapered by the water jet and a quick hit with a deburing knife usually results in a perfect fit.