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Old 07-15-2007, 02:43 PM   #1 (permalink)
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JIC VS AN Fittings

School me on jic, an hydraulic fittings. I've noticed setrab oil coolers have an fittings. Other things have jic. I'm getting ready to do the full hydro steering on my rig and want to be able to tell the difference. I hate not knowing the difference when dealing with the local hydro hose jockeys, they are jackasses to anybody they feel doesn't have a clue about hydro hose terminallogy.
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Old 07-15-2007, 02:56 PM   #2 (permalink)
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well I'm know that in my hydro bender I have NPT, JIC, and AN fittings? All I can say is find a good shop with guys that are willing to help.
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Old 07-15-2007, 03:12 PM   #3 (permalink)
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jic-37 = -AN

jic-45 is NOT -AN
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Old 07-15-2007, 03:22 PM   #4 (permalink)
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Originally Posted by tonka22 View Post
well I'm know that in my hydro bender I have NPT, JIC, and AN fittings? All I can say is find a good shop with guys that are willing to help.
Problem is, where I live there is only one shop local that makes hydro hoses.
And they are used to dealing with cat mechanics and such. Not to patient with the average guy.
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Old 07-15-2007, 03:23 PM   #5 (permalink)
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AN fittings are 37 degree flare and JIC come in both 37 and 45 degree. AN fittings were developed by the Air Force and Navy (hence AN) and are supposed to be manfactured to tighter tolerances than JIC. The differance has to do with the tolerances of the threads, although the exact differances I don't know. From what I have delt with AN fittings are used in aerospase and racing. JIC is used in industrial applactions.

I have used JIC and AN fittings together many times with no problems. Just make sure they are both 37 degree, or you will have problems. I think most JIC fittings are steel and AN fittings are alum, I have never had a problem here either but a little antiseize might not hurt.

Most local hose places stock JIC fittings. I have found its easier not telling them I am using thier fittings with AN fittings, they seem to get all butt hurt when they find out.

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Old 07-15-2007, 03:34 PM   #6 (permalink)
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AN=37* and JIC is 37* they work fine together. There is a JIC that is 45* but you'll prolly never see it.

I second the "don't tell them what your doing" idea.


EDIT; there are also SAE fittings that look just like JIC's but are not. There are some differences but its hard to tell without thinking about it. Be carefull what you get


I sure thought one was 37.5*

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Old 07-15-2007, 05:43 PM   #7 (permalink)
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We have done this many, many times before, so a search may turn up a lot of useful information if you still have questions.

SAE and JIC 37* flare are identical, there is no such thing as a JIC 45* flare, however, there is such a thing as a SAE 45* flare. The SAE 45* is used in low pressure applications such as plumbing and LGP or NPG installation.

Both JIC and -AN fittings are 37* flare seat angles. -AN is often incorrectly assumed to be the aluminum version of a JIC fitting, but in all actuality, -AN can be made from as many or more alloys than the garden variety JIC. Technically the fittings should not be interchanged, however, the only difference between -AN and JIC is the thread class. -AN is a military/aerospace spec fitting, with a tighter thread class (but still the same size and pitch as JIC) and is mostly intended for space shuttles and air planes. JIC was standardized to be a less costly High Pressure fitting that has no requirements of keeping a space shuttle in the atmosphere.

The fact of the matter is, that you would be extremely unlikely to find a actual -AN fitting for sale in any motorsport's catalog, or online web store. Most of the stuff marketed as AN whatever thingamajigger is actually just an anodized aluminum JIC fitting. Any true -AN fitting will be listed in it's catalog as conforming to mil spec MIL-F-5509.

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Old 07-15-2007, 06:09 PM   #8 (permalink)
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Thanks for the help. Your response's have helped me understand hydro fittings a little better.
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Old 12-16-2013, 07:25 AM   #9 (permalink)
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So bumping this up...I take it a 6m JIC is the same as -6 AN?

I am trying to put together my hydro steering lines and trying to interpret these different sites
http://www.polyperformance.com/shop/...d-p-18675.html

http://www.surpluscenter.com/Hydraul...le---Straight/
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Old 12-16-2013, 09:09 AM   #10 (permalink)
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Quote:
Originally Posted by Schmozilla View Post
jic-37 = -AN

jic-45 is NOT -AN

Concur, for what we do they're interchangeable.
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Old 12-16-2013, 12:07 PM   #11 (permalink)
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So bumping this up...I take it a 6m JIC is the same as -6 AN?

I am trying to put together my hydro steering lines and trying to interpret these different sites
Poly Performance JEEP/TRUCK & BUGGY┬*::┬*Plumbing┬*::┬*Fragola Performance Systems┬*::┬*Power Steering Hose and Ends┬*::┬*90░ Power Steering Hose End - 4X4 Off-Road Parts

Surplus Center

Yes, 6M being #6 male. AN and JIC use the same sizing convention.

The talk of thread tolerance difference as I recall is that AN uses 3A/B threads and JIC uses 2A/B.
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Old 12-16-2013, 03:13 PM   #12 (permalink)
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I believe that SAE 45* is your standard brake line flare seat angle as well.


Another thing to help with others working with these fittings when trying to figure out what dash size you need. The - number is the size in 1/16" increments. In this case a -6 would be 6/16" or a 3/8" fitting.


Also if you are in a real pinch, SAE ORB and JIC fittings have essentially the same thread pitch. I have cut off the flare and stuck an o-ring on a JIC fitting in order temporarily patch a piece of equipment back together. I wouldn't recommend doing that long term though. This only works with a JIC in an ORB port, and not the other way around.
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Old 12-16-2013, 03:56 PM   #13 (permalink)
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Unrelated, but because there are some people knowledgeable about fittings in here.

I just got some equipment from Germany that I need to finish out the hydraulics on; all the fittings are 24-degree DIN / metric thread. This is not the easiest thing to find.

What I actually need is an adapter to go from an 18mm 24-degree cone flare to a 18mm straight thread. Somebody over there decided that they needed to use super badass hydraulic hose for a non-pressurized breather line, and the breather is a straight 18mm thread.

Pretty sure this part doesn't exist in industry anywhere, because it's not something you'd ever really need to use in a standard setting. Once the equipment gets here I'm probably just gonna try screwing the breather into the flare fitting and seeing if enough threads engage that I can just wrap some yellow Teflon tape on it and call it good.

Anyone with experience in German hydraulics, thoughts are welcome.
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Old 12-16-2013, 07:46 PM   #14 (permalink)
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Let me make a call to my hydro vendor in the morning. If the parker makes the fitting, I will have a part number for you in the morning.

You need a straight thread boss oring male to 24* male right?




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Old 12-17-2013, 05:39 AM   #15 (permalink)
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Quote:
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Let me make a call to my hydro vendor in the morning. If the parker makes the fitting, I will have a part number for you in the morning.

You need a straight thread boss oring male to 24* male right?

Matt
Close, the straight thread is a female 18mm, adapting to the 24* male.

Here's a drawing of the part, just trying to avoid machining 10 of them if it's something already available.
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Old 12-17-2013, 06:30 AM   #16 (permalink)
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Call these guys. I've bought from them before too since we use those funky 24* fittings on the corn heads we import. Even though they don't list the fitting on their site (yes it sucks) give them a call. I've been surprised every time I call with some off the wall fitting.



Metric 24 Degree Connectors, DIN, BSPP and BSP Adapters and Unions
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Old 12-20-2013, 06:21 AM   #17 (permalink)
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We used Brennan a lot at my previous company for odd balls, and for production. Good people to deal with, and have a lot of stuff to select from.
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Old 12-20-2013, 09:03 AM   #18 (permalink)
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I've ordered hard to find metric electrical connectors from here with luck: MARYLAND METRICS 'HOME PAGE'

They look like they might have some hydraulif fittings as well.
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Old 12-21-2013, 12:37 AM   #19 (permalink)
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Oil Filter Services in Portland has helped me out with din flared fittings before, used on 80's Bosch mechanical fuel injection.

Other side of the country though, unsure if they do phone orders or what, but they will either have it or make it.
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Old 03-10-2014, 03:41 PM   #20 (permalink)
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Don't know if you found this part yet, but is looks like a metric bushing. The other place I have gotten British and Metric fittings is Hydraulics Direct
They have a good selection similar to brennan and parker.
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