AN line is measured in 16th
AN-6 is 6/16" or 3/8"
I used 8 AN for supply (1/2") - That's overkill for my engine but it fit the tank outlet pretty good ... pushed it onto the hard line and clamped it down with a SS hose clamp
I used 6 AN for the return, again, it fit the line at the tank
When you cut them to install fittings use masking tape tight around the location where you cut. Use a Dremel tool with a thin cutting wheel or a angle grinder (wider cut).... leave the tape in place, oil the hose end and push the fitting in place... TT has a few good pictures, he's pretty good at these AN fittings :thumbs:
On the connection to the tank I simply cut 1" of the stainless braids off to expose the hose so that I could use a hose clamp. I did wrap the end of the braids with electrical tape ... if I ever lift the body or drop the tank I'll change it to Swedgelock fittings that crimp onto the line at the pickup.... I doubt it will ever be needed.....