I have a question about -AN plumbing fittings..........

[Triton]

can someone please tell me if a -6 AN hose is equivalent to 3/8" hose?



Also, when using AN fittings with fuel, I know it might be a good idea to used teflon but, is it necessary or should it not be used ?

 

[RustyJC]

AN hose sizes are expressed in 16ths of an inch; therefore a -6 AN hose would be 6/16", or 3/8".



No thread sealant should be required on AN threads. The taper of the fitting provides the seal.



Rusty

 

[Triton]

Thanks for the answer. That helped a lot knowing how to figure the sizes.

 

[DTroy]

Rusty is dead on.



Also keep in mind that the aviation world uses a different degree flare versus the automotive world.



( for the guys that get freebies )

 

[nickleinonen]

Rusty is dead on.



Also keep in mind that the aviation world uses a different degree flare versus the automotive world.



( for the guys that get freebies )

some will be interchangeable. .



the automotive "an" fittings are based off 37° jic fittings. .



some of the industrial stuff has a sae 45° flare [like hydraulic brake fittings]



37° fittings are better than 45° in most situations, and can withstand higher pressures



99% of all jic stuff is compatable with "an" [but i would recommend not using AN stuff on true hydraulic systems, as they most are not steel, and may not stand the high pressures (up to 10,000psi) that could be put on them]

 

[RustyJC]

One thing that hasn't been mentioned is that the threads of aluminum AN fittings should be lubricated with a bit of oil before tightening to prevent galling.



Rusty

 

[John]

Excellent advice as always, Rusty.

 

[Triton]

another thing that wasn't mentioned here is. . with -AN sizing it's " outside diameter " you're getting.



As was mentioned -6 would be 6/16th or 3/8" which is outside diameter. To have a true 3/8" line you would need to step up to -8 AN



After the help here and doing my set up below, I learned a lot about AN type fittings and hose.

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[HEMI®Dart]

Just recently found out AN stands for Army/Navy.



A tip:



If you are going to use Earls AN fittings, try to you Earls braided hose.



If using Summit Racings AN fittings (A strong buy) use Summits braided hose.



A month ago I used a Summit -6AN 90° elbow on either Russel or Aeroquip -6 hose and it was a nightmare to get the fitting to thread over the hose. It seemed like the hose's OD was about . 015 bigger the Summits hose. Taped and re-cut line till I was blue-in-the-face. I never did get right. It is only a fuel cell vent line so I didn't care.

 

[NoSeeUm]

Nice looking install Triton.



Jim

 

[JMarketos]

I'd like to echo the reply made by HEMI... above.

When installing trans cooler on my truck, I telephoned Summit's tech support

because I was unsure whether AN fittings from different manuf. could be

mated to each other. Answer was yes, with the caveat being to make sure

they're all the same bevel angles.



The Summit tech went on to tell me something I didn't know, which was

advice to use hose from same manufacturer as the fittings, because

wall thicknesses (hose construction) varies, and it can be a bear if

you happen to make the wrong combo of hose and fittings.



For what it's worth, I've had super service from Summit on many orders.