Steel adapter fittings provide a bulkhead style connection to AN lines that can be mounted directly to the chassis by using tabs or brackets and retainer clips. Fittings fit in a 5/8" hole and are sold in a pack of 2.

For use with these:
ALL60030 Weld-On Tabs, 5/8" Hole, 4-Pack
ALL60029 Bolt-On Tabs, 5/8" Hole, 2-Pack
ALL50150 Retainer Clips, 4-Pack