# AN Sizes

#

**1**Senior Member

Thread Starter

Join Date: Mar 2006

Location: Tampa/St Petersburg

Posts: 4,334

Thanks: 0

Thanked 0 Times
in
0 Posts

Vehicle: Turbocharged 2001 Hyundai Tiburon

Well i just searched the internet and found that it was a little hard to find out what AN sizes convert to in british units.

I noticed that the only other place AN sizes are mentioned on these forums they were incorrectly attributed to metric units, in otherwords -10AN means 10mm diameter, thats not the way it goes.

But the solution to the question of "what the F#&K does -08 AN mean?" is actually quite simple.

The AN number corresponds to the numerator in a fraction where the denominator is 16.

SO, -08 is equal to 8/16 or 1/2 and -10AN would be equal to 10/16, or 5/8.

So the if outside diameter of a piece of piping is 1/2 it requires a -08AN fitting.

Here is a convenient chart:

-02 AN is equal to 1/8 in.

-03 AN is equal to 3/16 in.

-04 AN is equal to 1/4 in.

-05 AN is equal to 5/16 in.

-06 AN is equal to 3/8 in.

-08 AN is equal to 1/2 in.

-10 AN is equal to 5/8 in.

-12 AN is equal to 3/4 in.

-14 AN is equal to 7/8 in.

-16 AN is equal to 1 in.

-20 AN is equal to 1 1/4 in.

-24 AN is equal to 1 1/2 in.

-32 AN is equal to 2 in.

I noticed that the only other place AN sizes are mentioned on these forums they were incorrectly attributed to metric units, in otherwords -10AN means 10mm diameter, thats not the way it goes.

But the solution to the question of "what the F#&K does -08 AN mean?" is actually quite simple.

The AN number corresponds to the numerator in a fraction where the denominator is 16.

SO, -08 is equal to 8/16 or 1/2 and -10AN would be equal to 10/16, or 5/8.

So the if outside diameter of a piece of piping is 1/2 it requires a -08AN fitting.

Here is a convenient chart:

-02 AN is equal to 1/8 in.

-03 AN is equal to 3/16 in.

-04 AN is equal to 1/4 in.

-05 AN is equal to 5/16 in.

-06 AN is equal to 3/8 in.

-08 AN is equal to 1/2 in.

-10 AN is equal to 5/8 in.

-12 AN is equal to 3/4 in.

-14 AN is equal to 7/8 in.

-16 AN is equal to 1 in.

-20 AN is equal to 1 1/4 in.

-24 AN is equal to 1 1/2 in.

-32 AN is equal to 2 in.

#

**4**Senior Member

Join Date: Jul 2004

Location: Eau Claire, WI

Posts: 5,155

Thanks: 0

Thanked 0 Times
in
0 Posts

Vehicle: 97 Tib

that's one thing i've always wondered when i heard you turbo guys talking ... i could never figure out what measurement an AN was..lol.

good post

good post

#

**5**Senior Member

Join Date: Mar 2006

Location: Ashland, KY

Posts: 4,244

Thanks: 0

Thanked 0 Times
in
0 Posts

Vehicle: 2001/Hyundai/Tiburon

hehe, I think that metric thing might have been my fault, I had the same problem and finally found out by calling summit. that was a while ago though.

why the heck don't they just call them by their sizes!!!

anyways thanks for the info!

why the heck don't they just call them by their sizes!!!

anyways thanks for the info!

#

**6**Senior Member

Join Date: Sep 2006

Posts: 187

Thanks: 0

Thanked 0 Times
in
0 Posts

just thought i would just let anyone who was interested know that AN Fittings are normal hardware for the Aviation industry. Everything from small 2 seater cessnas to 747 use AN fittings an if they are blue they are aluminum. This is the usual.

Hope this is helpful

Zippy1

Hope this is helpful

Zippy1