What does an ORB to AN adapter do?

It converts a port with an O-ring boss thread to a male AN/dash thread so you can attach an AN hose end. The O-ring side seals against the port face; the AN side takes a standard flare fitting.

Is it safe with E85 and methanol?

Exoracing rates the adapter for E85 and says it resists methanol. That makes it suitable for flex-fuel and alcohol fuel systems, though you should still check the O-ring material for long-term alcohol exposure.

Will it fit my AN hose end?

The AN side follows U.S. AN and JIC thread standards, so it should mate with standard AN hose ends of the matching size. Match the dash size on both sides before ordering.

One straight adapter with the selected ORB and AN thread sizes. No hose end, O-ring spares or extra fittings are included.

Can I use it for oil and air lines too?

Yes. Exoracing lists fuel, oil and pneumatic use, so it works on oil cooler and turbo feed lines as well as air lines within the rated pressure of the fitting.