-AN fittings size for trans coolers - Lateral-g Forums

Rod P · #1 01-22-2012, 06:02 PM

NPT is National Pipe Thread

Its cut with a taper, that way it pressure fits the connection. 3 threads is about normal it will go in more with a thread sealer paste (don't use Teflon tape please) there is no real lubricating property in tapes

on the 1/4 one it sounds like there are 2 different thread pitches, don't force it, make sure its a 1/4-20 or a AN, a flair or even metric

makoshark · #2 01-22-2012, 06:17 PM

the 1/4" fitting I have is a 1/4" NPT to -6an fitting. Only one thread will start, so I have not tried to force it. I know this fitting does not fit the trans mount cooler. The question is, what freaking fitting fits it?

I am digging through the mail-order places and not finding anything. What is everyone using there?

**GregWeld** · #3 01-22-2012, 06:28 PM

No "right answer" to that -- because it depends...

Depends on what your female is.... and nobody can see that from your pictures - and even then we'd be guessing. If you have a inverted flare then it's going to take an inverted flare fitting -- not a NPT fitting.

Most likely your radiator trans cooler takes a 5/16" HARD LINE... with a 45* double inverted flare... so if you're going to try to convert that to a -6 AN - you're going to have to figure out what it SHOULD take and then try to find a conversion fitting.

Vegas69 · #4 01-22-2012, 06:34 PM

Are you sure the cooler isn't AN threads? They are different than NPT.

**GregWeld** · #5 01-22-2012, 06:41 PM

Best thing to do is figure out who made your parts -- and ask THEM --- otherwise it's just wild guessing....

You'll find plumbing very frustrating until you figure out what all these different fittings look like === hot rod parts can be ordered with many different "custom" thread types and sizes... one guy might need his cooler with "O" ring fittings another guy might want NPT to use a barbed hose... that's why nobody can just tell you "IT'S THIS".

**GregWeld** · #6 01-22-2012, 06:48 PM

These guys might be your best new friends.....

http://www.purechoicemotorsports.com...=cat/cat99.htm

makoshark · #7 01-22-2012, 06:58 PM

http://www.purechoicemotorsports.com...rod/prd342.htm

I think I found the fitting. I'll give them a call tomorrow. Thanks a bunch.

Vegas, the B&M cooler is 1/2" NPT. I was just uncertain if the fittings I had fit because I was only able to engage 3 threads by hand. Seems that is sufficient and with a wrench and thread lube it will engage more.

Thanks for the help guys.

makoshark · #8 01-22-2012, 06:48 PM

Quote:

Originally Posted by GregWeld

No "right answer" to that -- because it depends...

Depends on what your female is.... and nobody can see that from your pictures - and even then we'd be guessing. If you have a inverted flare then it's going to take an inverted flare fitting -- not a NPT fitting.

Most likely your radiator trans cooler takes a 5/16" HARD LINE... with a 45* double inverted flare... so if you're going to try to convert that to a -6 AN - you're going to have to figure out what it SHOULD take and then try to find a conversion fitting.

Thanks. Yes, 5/16" lines are what I have and they bolt right up, so this isn't a one-off custom setup. I know there is more than one person that has done this before.