Quote:
Originally Posted by camcojb
just realize that with the common braided steel over rubber line they actually come out smaller than this. I think in teflon lined hose it's probably more accurate. For example, #8 braided line is closer to 3/8" id than it is to 1/2" id. #6 is closer to 5/16" id, and so on.
Jody
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The standard it does not specify inside diameters do to varying wall thickness. The sizing system works off OD.
http://en.wikipedia.org/wiki/AN_fitting