DEWHEL Universal 6AN Fuel Tank Return Line Fitting Bung Kit - Aluminum, No Welding Required

DEWHEL Universal 6AN Bung Kit for Fuel Tanks

Upgrade your fuel system with the DEWHEL Universal 6AN Bung Kit. Made from durable aluminum, this fitting is designed to add a threaded bung to a fuel tank without welding. It creates a solid foundation for a return line connection, suitable for a range of tanks from stock setups to performance builds. The kit pairs a 9/16-18 to 6AN adapter with a reliable seal, delivering a clean, dependable retrofit that keeps weight low and corrosion resistance high.

The installation is straightforward and user friendly: you drill a 1/2 inch hole, insert the bung, and tighten. The bung seats firmly against the inside of the tank as the bolt is rotated, collapsing the bung and pressing the O-ring into place to help minimize leaks. The included O-ring adds an extra layer of protection against seepage, contributing to a tidy, drop-in retrofit in less time than a typical welding job.

Key benefits

• Aluminum construction keeps weight down while offering durable corrosion resistance.
• 9/16-18 to 6AN fitting supports a wide range of return line configurations.
• Compatible with tank material up to 1/4 inch thick.
• O-ring included to help prevent leaks and improve seal integrity.
• Requires only a 1/2 inch drill hole; no welding needed for retrofit.
• Bolt-driven seating presses the bung against the tank interior for a secure fit.
• Torque guidance around 60 Nm or use a power tool for consistent seating.
• Enables a threaded bung on the fuel tank to install a return line with ease.

Real world uses

• Retrofit a return line on older or modified fuel tanks without welding.
• Support performance or race builds that require flexible return line options.
• Install in tanks where welding is not feasible or desired.
• Streamline maintenance with a straightforward, tool-friendly install.

Installation at a glance

• Mark the location on the tank.
• Drill a 1/2 inch hole.
• Thread the bung and seat it inside the tank.
• Tighten to press the bung and seal against the interior surface.
• Attach the 6AN return line to complete the setup.
• Verify torque around 60 Nm or use a power tool for consistency.