Weld-In Bungs, Nuts and Fittings

A quality weld-in bung is a smart way to add an o2 sensor, petcock drain, or plumbing fitting to automotive components like exhaust tubing, oil pans, fuel cells, or...

A quality weld-in bung is a smart way to add an o2 sensor, petcock drain, or plumbing fitting to automotive components like exhaust tubing, oil pans, fuel cells, or intake manifolds. And weld-in bungs are downright essential if you’re building a custom exhaust and need to add an oxygen sensor anywhere in the header tubes or exhaust system.

Better yet, if you’re drilling a hole in your oil pan or fuel cell to add a fitting for something like a drain, fuel line, or an external oil cooler, a weld-in bung can save a ton of time and hassle over cutting, drilling, and tapping one yourself. Weld-in bungs are also handy for folks building custom nitrous systems, where you may need to add an assortment of sensors and injectors to ensure it operates correctly.

Whether your want an aluminum bung or a steel bung, a weld-in threaded bung, or metric weld bung, Summit Racing carries plenty of weld-in options in a range of sizes and threads. From AN and metric thread to trusty NPT, you can find a weld-in bung that’s perfect for your precise need. And having a wide selection of weld-in bungs is vital, because weld-on bungs are ideal for a lot of critical applications, including oxygen sensors, along with any sort of plumbing for external fluid coolers, turbo and supercharger oiling systems, air conditioning lines, and gauges. But again, if you’re here, there’s a good chance it’s because you need a weld-in bung for an oxygen sensor. And for that, we’ve got your covered.

Even if it’s not for an o2 sensor, you can find the best weld-in bung for your needs by using Summit Racing’s handy search filters to narrow down your results. Adjust your filters by vital search parameters like the weld-in bung’s thread pitch, outside diameter, and material. There are hundreds of weld-in bung options to choose from, so there’s a very, very good chance you’ll find the right weld-in fitting or sensor bung for your ride right here at Summit Racing.

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NOS Weld-In Nitrous Nozzle Fittings 17284NOS

Weld-In Nitrous Fitting, 1/16 in. Thread, 3/4 in. Length, 0.250 in. Hole, Aluminum, Set of 8

Part Number: NOS-17284NOS

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Nitrous Outlet Annular Nozzle Bungs 00-01666

Bung, Aluminum, Female Threads, Nitrous Injection, 1/16 in. NPT, Each

Part Number: NXO-00-01666

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Estimated Ship Date: Monday 11/24/2025

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58110-AL-1/8

Nitrous Outlet Weld On Bung - 1/8" NPT Female Hex

Part Number: NXO-6058110AL18

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58107-AL-08

Nitrous Outlet Weld On Bung - 8AN Male

Part Number: NXO-6058107AL08

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58107-AL-06

Nitrous Outlet Weld On Bung - 6AN Male

Part Number: NXO-6058107AL06

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58107-AL-10

Nitrous Outlet Weld On Bung - 10AN Male

Part Number: NXO-6058107AL10

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58108-SS-06

6AN Hex Weld-On Stainless Steel Bung

Part Number: NXO-60-58108SS06

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58109-SS-F-1/8

1/8" NPT Aluminum Weld-On Bung

Part Number: NXO-6058109AL18

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58109-SS-F-3/8

Stainless Steel Weld On Flange - 3/8" NPT Female

Part Number: NXO-S0552

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58109-AL-3/8

3/8" NPT Aluminum Weld-On Bung

Part Number: NXO-6058109AL38

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58108-ST-06

6AN Hex Weld-On Steel Bung

Part Number: NXO-60-58108ST06

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58108-ST-03

3AN Hex Weld-On Steel Bung

Part Number: NXO-60-58108ST03

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 00-01666-10

Weld-In Bungs and Fittings, 1/16" Annular Nozzle Bungs - 10 Pack

Part Number: NXO-00-01666-10

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58109-SS-3/4

3/4" NPT Stainless Steel Weld-On Bung

Part Number: NXO-6058109SS34

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

Nitrous Outlet Weld-In Bungs, Nuts and Fittings 60-58110-AL-3/4

3/4" NPT Aluminum Hex Weld-On Bung

Part Number: NXO-6058110AL34

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

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