AN stands for??

[ScottyCBoy at aol.com]

In a message dated 3/19/99 4:41:21 PM Central Standard Time,
clarencewood at centuryinter.net writes:

<< 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? >>

An stands for Army/Navy which is who first developed the fittings for
aircraft/airframe usage.