On Mar 16, 11:31*am, "Carl Byrns" wrote:
"Carl M" wrote in message

...

* * I have a 3/4" pipe thread hole in an aluminum plate, and I need
to be able to connect to both sides of it using pipe fittings, with
the through bore size not so critical. *I have been looking around the
web trying to find out what to call a double sided reducing bushing,
but so far no luck. *Short of having one made, I'm wondering if anyone
has had this problem before and what you did about it. *FWIW, the
fittings would hopefully be stainless, but there's no serious need for
it other than everything else in the system is.
* * Thanks!

Search on 'bulkhead coupling'.http://www.kthsales.com/website/vend...n-Fittings.htm

http://www.discounthydraulichose.com...ings_s/220.htm

HTH- Carl (not the same Carl and not Karl)

I've seen those, but not quite what I need. I have atmospheric
pressure on one side of the plate, high vacuum on the other, and I
need to pipe through a different pressure, so it has to fit the
existing pipe thread (the plate is too big to take back to the machine
shop, and I'd rather not drill it out for a baseplate NPT adapter,
which might be too small) and let me connect pipe fittings on either
side.
Thanks for looking, though!