Dean,
I may be wrong here, but I believe the threads are metric... 10mm if I'm correct.  It is very close to the 5/16-24, but not a perfect fit.  They sell a 10mm x 1.0 to AN adapter.  See: http://www.pegasusautoracing.com/pdfs/069.pdf 

Mark

At 09:20 PM 8/2/2004 -0500, you wrote:

Mark and Scott

The NAPA pumps that I purchased from Tracy were marked Carter 2H26A380 and
the screw in barb adapter was a 5/16-24 thread.  I was unable to find any
source of 5/16 to AN6 adapters.  I obtained the Earl's 991953 fittings which
came with soft aluminum seal washers.  Using a 23/64 drill and both standard
and bottoming 10mm-1.0 taps, I was able to cut several almost complete
threads to match the Earl's fittings.  After removing any trace of cuttings
and carefully smoothing the pump face, I installed the fittings using the
aluminum washers and fuel lube on the threads. They torqued up well but I
haven't had a chance to leak check them yet.

Dean Van Winkle
RV-9A Fuselage/Finish  '89 13B NA, RD-1B, EC2, EM2


----- Original Message -----
From: "marc" <cardmarc@charter.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, July 29, 2004 6:53 PM
Subject: [FlyRotary] Re: Fittings for Tracys Fuel Pumps Was Re: Fuel Filter
Part Number


> I've always wondered why almost ALL cars never use AN fittings and their
> fuel lines seldom leak. Somehow, with the number of cars on the road
> that are fi, I think AN fuel lines are a waste, (if you do it right,
> using the right clamps and lines!).
>
> Marc Wiese
>
>
> > -----Original Message-----
> > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
> On
> > Behalf Of Scott
> > Sent: Thursday, July 29, 2004 6:41 PM
> > To: Rotary motors in aircraft
> > Subject: [FlyRotary] Re: Fittings for Tracys Fuel Pumps Was Re: Fuel
> > Filter Part Number
> >
> > >> <snip>
> > >>I have Tracy's fuel pumps as well, and I have a note
> > that says the fittings to convert those to
> > >>AN-6 are Earl's 991953.  These are metric 10mm x
> > 1.0P to AN-6.
> >
> > I too purchased Tracy's pumps.  The one's sent came
> > from NAPA marked as 3f27a380 purchased from Tracy in
> > November 2003. The screw in barb adapter on the high
> > pressure side of the pump is 3/8" with 24TPI.
> >
> > Though oddly enough the ID of the tube is 7/32.  Not
> > 1/4 and not 3/16.  Interesting...
> >
> > Regards...
> > -Scott
> >
> >
> >
> >
> >
> >
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