Thread: AN Fittings?

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Hey guys, I am looking into learning about AN fittings. My first question is-Where do the sizes come from? 6AN, 8AN etc. Are they metric sizes? Or are they on a whole different size system? Next, are they All aluminium? And, how do they mate to the hose? Can you cut steel braid hose to length and put on the AN fittings yourself?

Originally Posted by josh bichard

Hey guys, I am looking into learning about AN fittings.

Pretty good explanation here: http://en.wikipedia.org/wiki/AN_thread
And yes, you can make up your own hoses.

Bob

Hi Josh,
I haven't gone to an yet myself so I can't answer the 1st 3 questions but yes, you can cut the hose and do it yourself. It does have to be done properly however and there are several sources for doing this. Google "AN hose assembly" and see what you get. I believe Street Rodder did a article on this awhile back and may have the procedure on their web site.

Jack.

AN sizes are really quite simple, the dash number, ie -4, -6, -8 etc refers to the hose size in sixteenths of an inch.... A -8 hose is 8/16", or 1/2". A -4 is 4/16", or 1/4". When you buy the components, it's best to keep them all the same brand and the same product line to ensure compatibility....

Not hard to make up your own, do some studying on the various manufacturer's sites and there are some very good instructions....

“Army-Navy” (AN) sizes were established by the aircraft industry to meet military standardization for aircraft. The numbers are equal to the outside diameter (OD) of the tubing in sixteenths. Since tubing and hoses can have different wall thicknesses, the size number does not necessarily tell you how large the inside diameter will be.

Oooh - great minds think alike, but Evo's fingers are faster!

Lotta good info. Thanks guys.

One more question. I just ordered a fuel line from russel for my holley 4150 that says it has a 6AN inlet. My mechanical fuel pump has 1/4 inch npt inlet. So would I need a hose with a 6an on one end and a 4an on the other? If so, what size hose should I use?

Originally Posted by josh bichard

One more question. I just ordered a fuel line from russel for my holley 4150 that says it has a 6AN inlet. My mechanical fuel pump has 1/4 inch npt inlet. So would I need a hose with a 6an on one end and a 4an on the other? If so, what size hose should I use?

You'll need an adapter to go from 1/4" npt to -6, then a -6 hose to the carb, and whatever adapter's are correct for your carb to the -6 hose.

NPT is an entirely different thread from AN fittings... NPT is a pipe thread...

Cool, thats a start.
Hey Dave, did your 82 come with a turbo 350 from the factory?

Originally Posted by josh bichard

Cool, thats a start.
Hey Dave, did your 82 come with a turbo 350 from the factory?

Not sure, think it had a 700R4....need some parts off it? Got some of the original pieces laying around, Lord knows I don't use much stock stuff!!!!

Don't need any parts that I know of. Just wondered because I was going to bolt put my torque arm in saturday and was surprised with something. The mount that on the tranny that the arm sits in was opposite of my torque arm. I wondered if the 82s torque arm was different and maybe that was what rearend is in my car

Originally Posted by josh bichard

Don't need any parts that I know of. Just wondered because I was going to bolt put my torque arm in saturday and was surprised with something. The mount that on the tranny that the arm sits in was opposite of my torque arm. I wondered if the 82s torque arm was different and maybe that was what rearend is in my car

Guess I didn't pay a whole lot of attention to that stuff when I took mine apart.... Didn't like it so it all wound up in the scrap trailer..... Mine's a bit different now, nobody want to sit in the back seat of a 'maro anyway.....

It really is amazing how often that happens - several of us answering at the same time and coming to the same end as far as the advice/conclusion. Underscores that there's a lot of knowledge on this site!

Regards All,
Glenn

p.s. - I was a teacher's aide in a typing class in the 10th grade!! Old Remington electric monsters! How far we've come, eh?

Originally Posted by Evolvo

Glenn, thats really pretty funny. I guess that typing class I took in 8th grade has finally paid off, although I see Prof Severson got in a little ahead of both of us. What's even more amazing is that we all AGREED!!

Agreed???? Man, we better not let that ever happen again!!!!!