In article ,
Ol' Duffer wrote:

In article , says...
If the r.c.m guys can't help you, why not fill a plastic bag with
vinegar and tie it to the faucet? Keep the thread part in the
vinegar. Replace as needed. Cheaper than a new faucet or a rare
tap and die.

Thanks for the suggestion. I may give that a try if I can't find
a threading die. My thought is that acid may dissolve some of the
base metal as well as the mineral deposits, so I will have to be
careful with it.

Household vinegar (5% acetic acid) shouldn't hurt the base metal much.
I soaked a bucket of badly rusted hand tools in vinegar for a few weeks
once. They came out nice and clean. The few things that were pitted
were damaged by the rust, not by the acid.

Jan

--
The way to a man's heart is between the fourth and the fifth rib.