Author Topic: What is the spec. for en "AN" coupling.  (Read 9311 times)

Offline NeoTech

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What is the spec. for en "AN" coupling.
« on: January 09, 2012, 05:13:29 PM »
I have been around racecars most parts of my life and have been using these wonderful hose couplings..  The AN coupling.. Now when i have started to learn some machining i have been starting to wonder, how hard can they be to make myself?!

Do anyone have the thread specifications and so on for a aerospec. AN coupling?!
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/

Offline Brass_Machine

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Re: What is the spec. for en "AN" coupling.
« Reply #1 on: January 09, 2012, 11:39:32 PM »
I don't. Hopefully someone here does...

Eric
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We're all mad here. I'm mad. You're mad.

Offline Lew_Merrick_PE

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Re: What is the spec. for en "AN" coupling.
« Reply #2 on: January 10, 2012, 12:55:23 PM »
Neo -- AN couplings are Army-Navy specification parts.  This most commonly refers to an internally flanged nut and bushing (generally called a B-Nut) that fits tubing to make a gas-tight seal.  That is only one of the types of AN fittings.  There are also swage fittings that mate to the B-Nut fitting.  I have all the data on them, but have not yet scanned them to PDF.  If you can confirm the type of fitting you need to make, I have the data on it.

Military fittings developed by public investment of tax dollars have been being privatized over the past 25 years.  Even though most people in the field still say MS33649 for the o-ring seal high pressure hydraulic port (developed for WWII), the geometry of such ports is now controlled by SAE and is private intellectual property (identified as SAE AS-5202 ports).  Royalties are supposed to be paid for the use of such information (socialism for the rich, capitalism for the poor).  This is part of the effort began in 1984 when the National Bureau of Standards was "reformed" into the National Institute of Standards Technology here in the U.S.

I do have quite a library of (U.S.) military specifications that are public domain.  Printed on paper and bound in 3-ring notebooks they fill more than six feet of bookshelf -- though I also have many of them as PDF (when the grandkids get into trouble, scanning and formatting them into PDF is one of the punishments).  If it is an actual MS military specification and FED or DOD documents open to the public, you can generally download them from https://assist.daps.dla.mil/quicksearch/ in PDF format.  Branch-specific (Army, Navy, or Air Force) specifications were (mostly) removed prior to 1994.

I have something more than 600 AN specifications in my library.  If we can figure out which one(s) you want, I will be happy to scan them in and post them -- or e-mail them privately.  The copies ib]I[/b] have are Public Domain documents!

Offline Warrenm

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Offline NeoTech

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Re: What is the spec. for en "AN" coupling.
« Reply #4 on: January 11, 2012, 03:36:54 AM »
This was awsome, it helped alot just knowing what to google after, but more specific this is what we use today
http://www.summitracing.com/search/Brand/Summit-Racing/Product-Line/Summit-Racing-Hose-Ends/Hose-End-Size/minus-10-AN/?Ns=Rank%7cAsc&autoview=SKU

Mostly -10AN and -12AN sized hose ends with a AN fitting in the end that are threaded for NPT on one side and AN on the other.
I know they arent that expensive, but with shipping to sweden when you buy them in bulk they get pretty expensive actually.
The straight fittings are the ones i use the most actually and the swivels come in handy when i need to get around something.

You got specs on the straight and the swivel ones i'm really interested, the sizing should be more or less a table of different outer and inner diameters i guess?!

Neo -- AN couplings are Army-Navy specification parts.  This most commonly refers to an internally flanged nut and bushing (generally called a B-Nut) that fits tubing to make a gas-tight seal.  That is only one of the types of AN fittings.  There are also swage fittings that mate to the B-Nut fitting.  I have all the data on them, but have not yet scanned them to PDF.  If you can confirm the type of fitting you need to make, I have the data on it.

Military fittings developed by public investment of tax dollars have been being privatized over the past 25 years.  Even though most people in the field still say MS33649 for the o-ring seal high pressure hydraulic port (developed for WWII), the geometry of such ports is now controlled by SAE and is private intellectual property (identified as SAE AS-5202 ports).  Royalties are supposed to be paid for the use of such information (socialism for the rich, capitalism for the poor).  This is part of the effort began in 1984 when the National Bureau of Standards was "reformed" into the National Institute of Standards Technology here in the U.S.

I do have quite a library of (U.S.) military specifications that are public domain.  Printed on paper and bound in 3-ring notebooks they fill more than six feet of bookshelf -- though I also have many of them as PDF (when the grandkids get into trouble, scanning and formatting them into PDF is one of the punishments).  If it is an actual MS military specification and FED or DOD documents open to the public, you can generally download them from https://assist.daps.dla.mil/quicksearch/ in PDF format.  Branch-specific (Army, Navy, or Air Force) specifications were (mostly) removed prior to 1994.

I have something more than 600 AN specifications in my library.  If we can figure out which one(s) you want, I will be happy to scan them in and post them -- or e-mail them privately.  The copies ib]I[/b] have are Public Domain documents!
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/

Offline NeoTech

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Re: What is the spec. for en "AN" coupling.
« Reply #5 on: January 11, 2012, 03:39:47 AM »
This was a good read as well, i think i have to transfer that i can get out of it to a cad file though.

Is there anymore interested in this? I could try to supply Solidworks files or DXFs for these. =)

A quick search with Google, bought these up. Hope this helps.
http://en.wikipedia.org/wiki/AN_thread
http://assist.daps.dla.mil/docimages/A/0000/0004/1956/000000077235_000000123996_LLLRQMYLYT.PDF
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/