A question for which I have been unable to find an answer in the archive (though
I limited myself to 3 hours...):
What is the nominal thread for attachment of the pad? I have a couple examples
that all are in the ballpark of 0.810"-12, or 0.810"-11-1/2, or.... The less
than three complete threads do not give a good measure, and the originals that I
have are rough enough that all measure between 11-1/2 and 12 pitch using
traveling microscope and parallel wires.

My objective is to make a proper tap, since I have two Stanley era  with barf-
smelling plastic pads in need of replacement, and I have a threading demo to do
with some students. But, as the replacement pads will be in wood, being off will
lead to eventual failure, even with only 2-1/2 threads engaged.
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