Products List
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Aluminum Stepped NPT bungs
SNPT-AL$4.25 - $5.75Aluminum NPT Weld-In Bungs – 6061-T6 – Multiple Sizes Available Our 6061-T6 aluminum NPT weld-in bungs are expertly machined from high-strength round stock and tapped to your selected NPT thread size. Lightweight yet durable, these aluminum... -
Stepped NPT bungs
SNPT$4.25 - $8.001018 Mild Steel NPT Weld-In Bungs – Multiple Thread Sizes Available These weld-in NPT threaded bungs are precision-machined from solid 1018 cold rolled mild steel round stock, drilled and tapped to your selected NPT thread size. Known for its... -
Aluminum NPT Bungs
NPTal$3.75 - $5.506061 Aluminum NPT Weld-In Bungs – Lightweight & Corrosion-Resistant These NPT weld-in bungs are precision-machined from solid 6061-T6 aluminum bar stock and tapped to standard National Pipe Thread (NPT) specifications. Commonly used for fluid... -
Late HD Style 22mm Petcock Bung
22mmPK$9.00 - $17.5022mm Petcock Weld-In Bungs – 1018 Mild Steel (Short & Long Options) These 22mm weld-in petcock bungs are machined from solid 1018 cold rolled mild steel and tapped to accept standard 22mm x 1.0 thread motorcycle petcocks—perfect for... -
Steel NPT Bungs
NPT 83$3.00 - $5.501018 Mild Steel NPT Weld-In Bungs – Multiple Sizes Available These NPT weld-in bungs are precision-machined from solid 1018 cold rolled mild steel bar stock, then drilled and tapped to National Pipe Thread (NPT) standards for secure, leak-free... -
Stainless Stepped NPT bungs
SNPT-SS$4.95 - $11.95Stainless Steel NPT Weld-In Bungs – Multiple Sizes Available Our premium 300 series stainless steel NPT threaded weld-in bungs are precision-machined from solid round stock and tapped to your specified NPT thread size. Designed for custom... -
1/4" BSP Bung
BSP14$8.00This bung is common thread for British gas tanks and petcocks. They are British Standard Pipe Thread Parallel in a 1/4" size. Made of Mild Steel 1/4" BSPP Sold Each -
Stainless NPT Bungs
NPTss$3.75 - $5.50Stainless Steel NPT Weld-In Bungs – Precision Machined These stainless steel NPT weld-in bungs are machined from solid stainless steel bar stock, then drilled and tapped to National Pipe Thread (NPT) specifications for a clean, reliable fit... -
Triumph Oil Tank Feed Bung
TOFB$8.00This oil feed bung is made just for all of you Triumph builders, it is tapped to accept the factory style oil feed fitting that is used in the earlier Triumph oil tanks. Most builders like using the factory style fitting for traditional looks and because... -
20mm Petcock Bung
20MMPK$9.0020mm Petcock Weld-In Bung – 1018 Mild Steel (Triumph, BMW, Euro Style) This 20mm petcock bung is precision-machined from solid 1018 cold rolled mild steel and features a 20mm x 1.0 male thread, making it an ideal fit for Triumph, BMW and other...
Petcock Bungs & NPT Weld-On Bungs – Precision-Fit, USA-Made Fabrication Parts
Bung King's petcock and NPT weld-on bungs are high-quality, CNC-machined components designed for fuel tanks, oil tanks, and custom fluid systems. Whether you're building a custom motorcycle, modifying a tank, or setting up an oil system, our bungs provide clean, professional results with reliable thread fitment.
Each bung is made in the USA from steel, aluminum or stainless steel and available in a variety of sizes including 1/8", 1/4", 3/8", and 1/2" NPT as well as custom 22mm and 20mm petcock thread options. Designed for easy welding to flat or curved surfaces, these bungs are ideal for builders who demand accuracy, durability, and leak-free performance.
Common Uses Include:
Fuel tank petcock installation
Oil tank and line connections
Air or vacuum line fittings
Custom automotive or motorcycle builds
Why Choose Bung King Petcock & NPT Bungs:
CNC-machined for thread accuracy
Available in steel and stainless steel
Designed for welding to tanks and tubing
Made in-house in the USA
Trusted by pro builders, fabricators, and garage DIYers
Upgrade your fabrication quality with Bung King’s precision-machined petcock and NPT bungs—the go-to choice for serious custom builders.
