Custom Aluminum Bungs Manufacturer

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

We manufacture custom aluminum bungs in the weld and threaded designs. We offer experience, innovation, and quality to support your business.  

HM, Your Professional CNC Aluminum Bungs Manufacturer

Aluminum bungs are industrial fittings used to close up a hole in a tank or pipe. They can also be used as adapters. 

We offer a large variety of aluminum bung designs and features, including thread, flanges, female and male configurations. Many businesses need aluminum bungs for fuel tanks, injectors, radiators, and pipes. 

HM manufactures custom aluminum bungs in metric and imperial measurements, AN, and NPT standards. We will develop your design, support low-volume production, optimize the supply chain, and conduct rigorous quality control for your project.  



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Aluminum Bung Series

  • Aluminum Weld On Bung
    Aluminum Weld On Bung

    Aluminum weld-on bung is also known as pipe thread. It is used together with different types of fittings. Aluminum weld-on bung is widely used for gas tanks, oil bags, and other fluid containers. It is made with different thread sizes to suit specific applications.

  • Aluminum Weld On Fittings Welded Bung
    Aluminum Weld On Fittings Welded Bung

    Aluminum weld-on fittings welded bung can be used for automotive applications including air, coolant, oil, fuel, and more. It is stepped designed to ensure easy fabrication. Typically, these are made from aluminum materials.

  • AN12 Aluminum male weld on bung
    AN12 Aluminum Male Weld on Bung

    This weld-on bung is available in AN12 size with 15mm inside diameter. It also features a straight fitting degree. It is perfect for fuel line applications.

  • Custom Stainless Steel Aluminum bung
    Custom Stainless Steel Aluminum Bung

    This product is customizable according to the customer’s requirements. It features a male and female connection and ISO 7/1 thread. It is also suitable for pipe connection of steam, gas, etc.

  • customized aluminum stainless steel NPT bung
    Customized Aluminum Stainless Steel NPT Bung

    These are usually made from aluminum or stainless steel materials. It features a female internal thread. Customized aluminum stainless steel NPT bung is applicable for water pipe, oil pipe, and more connections.


  • Right Hand Weld-In Threaded Bung
    Right Hand Weld-In Threaded Bung

    Right-hand weld-in threaded bung is specifically designed to weld inside the end of the tubing. Then, a screw is used in a super pivot or hem joint. It can be used for adjusting the bars.


  • aluminum mild steel stepped tapered weld bung
    Aluminum Mild Steel Stepped Tapered Weld Bung

    Aluminum mild steel stepped tapered weld bung is ideal for mounting fuel or oil outlets, elbows, petcocks, valves, etc. It is mostly machined from aluminum (6061-T6) and mild steel (1018 cold finish).


Custom Aluminum Bungs Design

There are many different types of aluminum bungs. These fittings can be of two main types: male or female. Also, you can request a weld-in bung that would be glued in place permanently or a threaded bung that can be taken out. Naturally, you can specify thread size in NPT or AN.

Additionally, you can request an aluminum flange bung. A bung can be stepped or blind—like a straight pipe. Some less common aluminum bung designs include barbed weld bungs and bungs with thread on the cap. 

Contact us today, and we will give you a free manufacturing analysis and develop the perfect aluminum bung design for your application.



Custom Aluminum Bungs Design
Aluminum Bungs Production

Aluminum Bungs Production

Aluminum bungs are usually manufactured by CNC machining a billet of your chosen aluminum alloy. The HM factory has 100 sets of state-of-the-art CNC milling and turning equipment.

Using our advanced machines with 3-, 4-, and even 5-axis cutting, we are able to manufacture complex and detailed aluminum parts. Being a leading aluminum bung supplier in China, we achieve extreme precision with a tolerance of 0.002um. 

We also apply various surface treatments to enhance the durability, resistance to corrosion, and appearance of your custom CNC aluminum bungs.


Aluminum Bungs Application

Aluminum bungs are used in any industry where there are fuel tanks, containers, or pipes. This includes aerospace, automobile, medical, industrial, agricultural, electrical, telecom, and more. 

Some specific machinery includes radiators and valve covers, among other things. 


Aluminum Bungs Application
Why Choose HM Aluminum Bungs

Why Choose HM Aluminum Bungs

As a leading custom aluminum bungs supplier in China, HM offers a one-stop solution. We have great quality, optimized production, and advanced ODM options. 

Our 6S factory has ISO9001, ISO14001, ISO45001, and IATF16949:2016 APPROVED PPAP certifications, as well as material verifications and many quality tests. 

We support both mass production and low-batch manufacturing, having already developed over 50 000 projects and outputting 5 million parts per year.  

Our dedicated R&D department is always ready to design your custom ODM project, including specific features, surface treatments, and secondary engravings. 

More than 1000 clients worldwide have already chosen HM as their supplier. 

Choose us today!




Performance Fittings

Weld-in aluminum bungs are used in high-performance applications like racing. These bungs are permanent and resistant to impact. With aluminum’s high strength and low weight, these performance fittings are great for demanding applications. 

Custom Alloys

Being one of the leading aluminum bungs manufacturers in China, HM offers many custom aluminum alloys such as: 

  • Acd12
  • A380
  • ZLD104
  • Al 6082
  • Al 6063
  • Al 075
  • Al 5052

NPT Aluminum Bung

You can specify your thread requirements in NPT. The nominal size refers to the inside diameter of the pipe, not the outside diameter of the threads. The most common NPT sizes are ⅛, ¼, ⅜, ½, ¾, and 1. These aluminum bungs are nearly universal and can be of any design. 

Surface Treatments

We offer secondary manufacturing operations like anodizing, metal plating, polishing, sandblasting, colored powder coating, and more. This leads to enhanced corrosion resistance, decreased wear, and improvement of all main mechanical properties. 


Quality Checking
What is Aluminum Bung?

The aluminum bung is known as pipe thread. It can accept the same fittings that are used on fluid containers like gas tanks and oil bags. Depending on its thread size, aluminum bung can be available in numerous sizes to fit your requirements.

What is An Aluminum Bung Used for and What Could They Provide?

Aluminum bung provides outstanding mechanical and electrical isolation stability. Bung, nut, and aluminum are manufactured from high-quality materials.

Therefore, the aluminum bung is great for use in the following:

  • Radiators
  • Fuel or oil tanks
  • Manifolds
  • Valve covers
  • Rear-axle housing
What Are the Available Surface Treatments for Aluminum Bung?

Our aluminum bung is available in many different surface treatments. You can opt for

  • Clean
  • Polishing
  • Zinc plating
  • Nickel plating spraying
  • Anodizing
  • Powder coating

We produce aluminum bung through many different manufacturing processes. It includes the following:

What Are the Typical Applications of Aluminum Bung?

There are various types of aluminum bung that are helpful in many different industries. They are ideal in the following applications, such:

  • Telecommunications
  • Computer storage
  • Medical
  • Industrial equipment/machines
  • Retail
  • Military
  • Hospitality
  • Automotive
  • Electrical
  • Building
  • Furniture
  • Household
  • Machine assembly
  • Air industry
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