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Aluminum Stepped NPT bungs
SNPT-AL$4.25 - $5.75These weld in 6061 T6 Aluminum NPT threaded bungs are made of round stock, drilled and threaded to your specified NPT thread. Bungs are available in a few different lengths and diameter options depending on thread size. The larger diameter of the... -
Stepped NPT bungs
SNPT$4.25 - $8.00These weld in NPT threaded bungs are made of solid, mild steel round stock, drilled and threaded to your specified NPT thread. Bungs come in a few different length, and diameter options depending on thread size. The .200" step is machined into the bung... -
Aluminum NPT Bungs
NPTal$3.75 - $5.50Commonly known as pipe thread, these female NPT bungs are tapped to accept common fittings used on fluid containers such as oil bags and gas tanks. Made in a variety of sizes depending on thread size to fit your needs. machined from solid 6061-t6... -
Late HD Style 22mm Petcock Bung
22mmPK$9.00 - $17.50For use with Late HD style petcocks 22mm male thread made of 1018 mild steel available in two lengths to fit your application Sold each standard or factory length$9.00 2" overall length for custom applications$17.50 -
Steel NPT Bungs
NPT 83$3.00 - $5.50Machined from solid mild steel bar stock and drilled and tapped to national pipe thread (NPT). Bungs are commonly welded into a tank assembly and are tapped to accept common fittings used on fluid containers, such as oil bags and gas tanks. Made in... -
Stainless Stepped NPT bungs
SNPT-SS$4.95 - $11.95These weld in 300 series, stainless steel NPT threaded bungs are made of round stock, drilled and threaded to your specified NPT thread. Bungs are available in a few different lengths and diameter options depending on thread size. The larger diameter of... -
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 - $5.50Machined from solid stainless steel bar stock and drilled and tapped to national pipe thread (NPT). Bungs are commonly welded into a tank assembely and are tapped to accept common fittings used on fluid containers such as oil bags and gas tanks... -
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 Bung For use with triumph/style petcocks 20mm male thread Made of 1018 mild steel Sold each
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.
