
Originally Posted by
Dr_Snooz
I've heard they can be tricky, especially when using braided steel over top. I used some small AN fittings for my PS fluid reservoir. Like your radiator, it came with AN nipples.
They really make sense when you're using a lot of aftermarket hot rod parts where that's sort of the connection standard everyone has agreed on. You don't want to deal with double flares on your PS pump, but then barb fittings on your PS reservoir and then bulb fittings on your cooler. The AN stuff is expensive but it's standardized, so you only need one tool kit and not 5.
It's also a really robust connection, which is why the military uses it so much. The AN single flares are easy to make and still seal really well. Double flares would be better, but doing double flares in the woods or at the track (or while taking enemy fire) would be too fiddly and time consuming.
AN fittings also come apart easily and go back together more reliably than say, a bulb fitting, where the hose degrades a little more each time you pull it apart and then retighten the hose clamp. AN is definitely the right choice for rough service situations, like race cars or 4x rigs, where a lot of ongoing work will be taking place.
I'm sure a lot of us will be using them more as we as we are forced to swap in more hot rod parts to keep our cars running.
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