"G.R. Patterson III" wrote
mike regish wrote:

I have a 1/4-20 bottom
tap I'm going to run in to clean up the threads.

One more thing you've probably already thought of. Most taps have a
tapered tip. When used as a chaser, such a tap will not clean the
bottom threads in a hole. You can take care of this by cutting and/or
grinding most of the tapered section off the end of the tap.

Well, let's see.... he did say that he has a "bottom" tap.

Bob Moore