Although 5/16-inch hose is a common size in automotive applications, there is no AN equivalent, hence why we recommended 3/8-inch hose over 5/16-inch hose. As for which style of fittings to use ...

Although there are a few very-expensive, crimp-fitting PTFE AN hose/fitting products on the market, TechAFX is the only supplier we've found with aluminum fittings designed to work with the more ...