Ol' Duffer wrote:
I'm looking for a threading die for garden hose fittings.
I think this might be 5/8"x14 NPT. All the standard tap
and die sets skip over this size. Doesn't have to be
particularly good quality, carbon steel would be okay,
just want to chase threads on an old faucet that has
developed mineral deposits to the point that I can't
get a hose to screw on anymore. The faucet is otherwise
in good working order, and I hate to have to replace it
just because it needs cleaned up a bit. The folks who
make these parts have to have taps and dies, right?
So what are they using and where do they get it?

What if you take a junk female hose fitting and cut some axial lines in it with
a hacksaw? Not through cuts, just scoring cuts, enough to leave some sharp edges
to act die-like. Then just try threading it on, maybe the saw cuts would do the
job for you.

Another idea is a spot blaster tool with some glass bead media.

There is no thread 5/8-14 NPT that I know of. 'Course, I don't know everything,
not by a long shot, nor have I researched this. Also, *my* pipe fittings are a
lot bigger than 5/8".

There exist thread files for NPT threads, oddball thread counts like 11½. I own
one. Those would work OK for you although it's super-hard to file something
perfectly round..

GWE