Braided lines and AN fittings ...

As someone else stated the AN stands for Army Navy as in army navy standards or what is now MS, military standards. All aircraft use these fittings so you can go out to your local airport mechanic and if they aren't too busy they can either help you or teach you to get you started. they are flexible , tough, resist abrasion and serviceable in the field with wrenches rather than compression fittings.