WELD IN BUNG, Russell WELD IN BUNG, 10AN Male Weld-in Bung Aluminum, 10 AN Male Weld On Aluminum, Russell's wide variety of adapter fittings allow for the connection of AN hose ends and hardlines to almost any system. Adapters are offered in many configurations., 6061-T6 Aluminum, Precision Machined, Oxygen Sensor Bung.