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Old 10-18-2006, 08:41 PM
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Stupid question

Quick question I should have asked a long time ago so i wouldnt feel as dumb as I do now. On hose fittings and stuff like that, whats the AN mean, whats the difference between that and like 1/4 inner dia.?
Old 10-18-2006, 09:47 PM
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Car: 1982 Trans-Am
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That's a stupid question.


I asked that recently, search for "FAQ on fittings".

AN stands for "Army navy", which is who invented it. Basically it refers to it as having a 37* flare. AN measures stuff differently, -6, -8, etc. The number after the dash is the numerator in the fraction of /16.
So -6 is 6/16 or 3/8". etc.

The 37* flare is opposed to an SAE 45* flare. Those are fairly close though.
Those are both bass-ackwards compared to the 45* INVERTED FLARE, which is what is all over your car now.

I asked for a 45* flare fitting, thinking it would be obvious that I wanted an inverted flare fitting... When I got home I wondered "what the heck is this, and how do I use it..???"
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