AN fitting difference

While changing a old -8 hose out yesterday I noticed the I.D. of a old fitting was small, so I took a minute to compare it to a few others I had.

I thought this was interesting.

Thanks for the info ! I'll be sure to keep this in mind .

Why I recommend Aeroquip. XRP is a true aircraft cutter style end which some people don't like to work with, even though it is probably a better design and is more expensive. Summit? Who knows where that comes from. And the old Russell stuff was awful. No clue what the current stuff looks like. Earl's makes nice stuff and offers both styles, but I don't have any here to measure.

Interesting that I haven't been able to find any of these specs in anyone's information online.

I have been using Mostly XRP for years now.

Could someone measure the I.D. of other brands (Earls, Fragola, etc) just for reference?

I think I have some 8AN Earls fittings in the shop.

XRP is top shelf. They just aren't available at the cut rate mail order giants. Probably a reason or 2 for that.

I'm under the impression that 8AN should have a minimum I.D. of .500 through out the system, not smaller
AN, Army Navy, standards are based on .0625 increments, 8 times .0625 equals .500 inch, correct?

My technical information says:

-8AN metal tubing outside OD - 1/2"
-8AN hose ID - .438"
-10AN hose ID - .562"

If you are referencing mil-spec or AN hardware - bolts, screws, etc. - then yes, -8 is 1/2", -6 is 3/8", etc.

And here is what I got with three new unused fittings

.358 Summit
.367 Earls
.370 XRP

I have some Fragola stuff to as we just redid the Drasgter with all their stuff not long ago. Just cannot find an spare -8 fittings.

All of my Earls 8AN fittings are on a line, sorry.

Is the Earls a cutter style?

I will have to check at home if I have any spare Australian made Speedflow fittings to see how they compare

Yes it is and Earls Swivel seal same type as the XRP..

Aussie made Speedflow -8AN 0.389" ID

Speedflow are the best fitings I've used. Bigger internal sizes, more range, well suited to tighter spots. Here's a 45deg -8 earls and speedflow

Is Speedflow just down under... those
do look like a nice fitting

http://www.buyspeedflow.com/


http://anfittingguide.com/

I'm starting to see that if you really want a
certain size on the American stuff you better
go up one more size... between the fitting it
screws onto and the fitting itself we choke ours
pretty good

There is a dealer in California

http://www.speedflowusa.com/#

I hope that helps

My Earls #8 measures .375-.377 id.............

A very short section of 3/8" diameter in a 1/2" diameter line does very little to impede flow. It's all about head loss.

Fortunately for us who live in this universe, fluid will speed up through the narrow sections and slow down through the fatter sections. It's NOT like toothpaste, where once it goes through a smaller hole it remains that diameter.

Fluid dynamics is not intuitive.

R.

So putting a nozzle on the end of my water garden hose will allow me to fill my car wash bucket just as fast as an open hose? We are talking non compressible fluids, correct?

My opinion is the fitting they screw onto is the
choke point... I always drill them open a small
amount but I know its not a 3/8 bit.... I havent
measure the ID of the male fittings

You just turned it into a 3/8 hose unless you
increase the pressure to increase flow