AN fittings and JIC fittings

[Hammer396]

Are AN fittings the same as JIC fittings? Will they interchange? CAn you use them together? Trying to get AN fittings around Lloydminster is very hard but JIC are more common....

[Windsor-408]

I don't know if AN and JIC fittings are interchangable. If you can get JIC fittings that are plated they will look just as good as the AN's. If you contact MOPAC AUTO SUPPLY they may be able to answer the interchange question for you. I have dealt with them and find thier prices are very competitive. Cheers.WES:cool:

[dale48mrc]

AN and JIC fittings are different.AN fittings are usually aluminum and come from the avaition industry,hence light weight.JIC is used in hydralics and are steel.We all know what happens when disimilar metals are combined,especially aluminum and steel.It leads to galling and seized joints.
Okay I did a quick google search and threads are different,AN are3a/3b threads and JIC are 2a/2b.The angle of the flares is 37 degrees.I hope this helps.

[CDNflatlander]

Hey there Dale, the 2a/2b and 3a/3b signifies the class of tolerance. I would be interested in the taper comparison...are they both 37 degrees?
A quality thread lubricant would reduce any chance of gulling; there is a higher chance of gulling with similar materials than different hardness or grades. This being said, there is a stong posibility of the materials reacting together to create oxidation...siezing the parts together. Again, this can be reduced with a good thread lubricant.
I believe that I have read somewhere NOT to mix the thread styles, yes you can thread them together, but it may come to haunt you later! I will look for that article tonight.
Greg.

[dale48mrc]

From what I read the flares are the same versus the SAE 45 degree flare.I'll have to read that article a little more closely.And I agree on the thread lubricant.

[Hammer396]

went to town and bought a few JIC fittings, thread in the same, look the same other than steel vs aluminum, phoned a airplane mechanic friend of mine and he says that they are the same other than the material they are made of. he also said that you can interchange them. so it looks like I'm going to try it but I'm only going to use them in certain spots. places I won"t have to take apart, I only need 2 or 3, what lube should a guy use on them? oil, white lithium grease, maybe even coppercoat?

[CDNflatlander]

I have had the most success with Coppercoat for a thread lubricant.
Greg.....still haven't found the artical, but your bud gave you the answer.

[dustyrustee]

went to town and bought a few JIC fittings, thread in the same, look the same other than steel vs aluminum, phoned a airplane mechanic friend of mine and he says that they are the same other than the material they are made of. he also said that you can interchange them. so it looks like I'm going to try it but I'm only going to use them in certain spots. places I won"t have to take apart, I only need 2 or 3, what lube should a guy use on them? oil, white lithium grease, maybe even coppercoat?

If you desire piece of mind on affecting a good seal and insurance against vibration loosening over time, I suggest using a tadd of loctite blue medium strength thread adhesive...both on the mating tapers of the fittings and on the threads as well...loctite also acts as a thread lubricant while final tightening..and will take care of any irregularities in the match-up or surfaces of the tapers.

on taper pipe threads, loctite PSP teflon paste is great and reliably failureproof...based on my varied experience with high pressure hydraulics..

as well, I use anti-seize paste on many varied threaded fasteners...copper good, my preference is the nickel bearing grade, especially in high temperature applications....

[Hammer396]

good advice guys, I'm just finishing up making up all the fuel lines ect... then lube them up for the final install..

[dustyrustee]

good advice guys, I'm just finishing up making up all the fuel lines ect... then lube them up for the final install..

thanx for the thanx...happy if i have helped a bit...Ian

[34ford]

I used AN fittings and hoses as well from my engine to the stainless fuel lines .One trouble is you can't join aluminum to stainless very well unless you crimp. So I looked at the steel JIC fittings which I had a box of them and found them to be the same .I silver soldered the JIC to the stainless lines and used the anti seize as a lubricant . 4 months later I had to disconnect the lines and they came apart fine .There was at no time evidence of fuel leaks mind you I'm only running 60psi and almost nothing on the return line .
Bob

[Hammer396]

Thanks Bob. I'm only running 5 psi on the fuel pump so I don't think I'll have any problems, the AN fittings fit fine to the JIC, I'll just have to use some antiseize on the final fitting..