AN stands for??

[James Weiler]

I thought AN stood for airforce/navy as this is who the adapters were 
originally designed for.  As far as I'm aware there are only 2 types of 
fittings. AN and SAE.  AN flare is 37 degrees and SAE is 45 degrees so 
they aren't compatible.  As for thread sizes they may or may not be the 
same I don't know.  But you don't want to get the flare wrong as it 
defeats the whole purpose of the high quality fitting.
I've never heard the term boss before.

Also make sure you're not dealing with saginaw fittings (i.e. you 
mentioned your FPR, if it's a GM part then it's probably a saginaw type 
fitting.  These use O-rings.

hope some of this helps.  Where are you located?
jw


On Fri, 19 Mar 1999, Clarence Wood wrote:

>   I am at a loss.  I can not find out what an 'AN' size fitting is/means.  I have found out that 'Boss' is the same thread size.  I can go into a parts store and ask for a #10 MB (Male Boss) fitting and it is exactly the same as an AN #10 fitting; the only difference is that the guys in the parts store don't know what an AN is.  When I took my FPR in and showed them they said "Ah hell, that's a #10 MB to 3/8 fitting".  Can anybody tell me what the history of 'AN' is?  Also, what is the history of Boss, and why are they the same but called different names?
> 
> Clarence
> 
> 
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