NSN wrote:

I do have a standard pipe re-threading set and used its file with the
#12 grooves and it worked quite well but left a rough finish. I
smoothed it out a bit with the wire brush I use on my BBQ and it ended
up looking good. The problem I had before all this was that it would
not screw into my plastic quick-disconnects without serious binding.
All is well now helped a bit by silicone grease.

HD & others make a brass cutoff valve for the hose end. If you use one
of them, it will not have to come off the hose - the adapter will take
all future punishment rather than the hose end itself.

Bob