Custom Aluminum Bungs

HM is one of the leading suppliers of aluminum bungs in China.

We manufacture high-quality aluminum bungs and offer customized service

HM, Your Professional CNC Aluminum Bungs Manufacturer

If you are looking for a professional supplier of high-quality aluminum bungs, HM can be your first choice. We offer a variety of aluminum bungs, including weld bungs, tank bungs, radiator bungs, gas cap bungs, and injector bungs.

If you need to customize your aluminum bungs to specific sizes, we can accommodate any dimensions based on your business requirements. Common sizes range from small bungs with 1/8″ or 1/4″ NPT threads to larger bungs with 1/2″ or 3/4″ NPT threads. We also provide color customization services, such as blue, black, red, or silver.

Our aluminum bungs are commonly made from 6061-T6 aluminum, a lightweight and corrosion-resistant material widely used in manufacturing and fabrication processes. When you need to deliver liquid or gas, it can create a leak-proof seal. Every HM aluminum bung is very durable, even in extreme conditions, and is easy to assemble.

Aluminum Bung Series

  • Aluminum Weld On Bung
    Aluminum Weld Bung

    These bungs are typically used to weld onto another tube or pipe, providing a reliable and strong connection point for joining two pieces of aluminum together. They are available in various sizes, including standard AN, NPT, and BSP threads.

  • Aluminum Tank Bung
    Aluminum Tank Bung

    These bungs are threaded onto the tank wall to provide an attachment point for piping, hoses, or valves. They feature a reliable sealing mechanism to prevent leaks and can be used in fuel tanks, water tanks, hydraulic reservoirs, or industrial chemical tanks.

  • AN12 Aluminum male weld on bung
    Aluminum Radiator Bung

    Due to their lightweight and corrosion-resistant properties, our aluminum radiator bungs are a preferred choice. They usually have standard threads to ensure compatibility with sensors, valves, and other components. These bungs can be widely used for drain plugs, temperature sensor ports, overflow ports, and vent ports.

  • Aluminum Injector Bung
    Aluminum Injector Bung

    These injector bungs demonstrate stable and leak-proof functions when spraying fuel directly into the intake port. They can resist corrosion from fuel and engine fluids, ensuring long-lasting performance under high temperatures and pressure.

Specifications & Standard

Our aluminum bungs exceed industry standards and specifications, including ASME and ASTM standards. HM has its own specifications for the aluminum bungs it produces, which may be more detailed than general standards and provide additional information about the material, dimensions, and performance of the bungs.

bung Specifications
Surface Treatments

Surface Treatments

Our aluminum bungs typically have a smooth surface finish, enhancing their appearance and allowing for a better seal when connected to hoses or fittings. HM offers various surface treatments to increase corrosion resistance and appearance quality, such as anodizing, painting or powder coating, electroplating, and brushing.


Automotive Industry
Aerospace and Aviation

Aluminum bungs have a variety of applications due to their stability, lightweight nature, and resistance to corrosion.

Industrial application:, they provide a safe sealed environment in pressure vessels and are suitable for the transportation of gas and liquids. They can also be used to fix equipment and are easy to install.

Automotive industry: aluminum bungs are commonly used in oil pans and transmission housings as drain plugs.

Beverage industry:  they can be used to seal and pressurize containers, maintaining the quality of beverages.

Aerospace and aviatio:  aluminum bungs are used in aircraft parts due to their light and strong qualities, for mounting sensors, securing panels, or providing connection points for other equipment.

Marine and boating industry: aluminum bungs are utilized in boat hulls and deck fittings in salty marine environments.

Recreational vehicles and camping: aluminum bungs serve as the connection point for regulators and can withstand the rigors of outdoor use.

Quality Checking
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