Larry Jaques wrote:

On Wed, 27 Jul 2005 10:02:56 -0500, the opaque Duane Bozarth
clearly wrote:

Seeker wrote:
...Harbor Freight is an excellent place for high flow air fittings. I believe HD,
Lowes have a limited selection too.

I've never used HF's fittings so have no idea what they're like or
whether they are consistent. There's a "veritable plethora" of
differing designs which are not all interchangeable, even for the same
nominal size(s). I suggest standardizing on a name manufacturer such as
Milton of a given style so you're not dependent on the "stock of the
day" at the Borg or other vendor...

Only two styles are common nowadays: automotive and industrial.
I converted all my old M-style (auto) connectors to industrial,
the "new standard" T-style AFAIK. Below are Miltons:


Hell, there are at least 4 non-interchangeable ones hanging on the wall
at the local farm supply...some I'm sure aren't as common as others, but
I'd be surprised if there aren't still a lot more choices than two...I
know the ones from Lowe's I had aren't interchangeable w/ any of the
Milton's in stock locally...