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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Summit Racing™ Oxygen Sensor Bungs SUM-630590

Fitting, O2 Bung, Weld-In, Oxygen Sensor, 18mm x 1.5, 304 Stainless Steel, Saddle Type, Each

Part Number: SUM-630590

5.0 out of 5 stars ( 1 )

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Summit Racing™ Oxygen Sensor Bungs SUM-G2990

Fitting, Bung, Weld-In, Oxygen Sensor, Steel, 18mm x 1.5, Each

Part Number: SUM-G2990

4.72 out of 5 stars ( 57 )

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Summit Racing™ Oxygen Sensor Bungs SUM-630591

Fitting, O2 Bung, Weld-In, Oxygen Sensor, 18mm x 1.5, 304 Stainless Steel, Each

Part Number: SUM-630591

3.0 out of 5 stars ( 2 )

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Summit Racing™ Weld-In Bungs SUM-220072

Fitting, Bung, Weld-In, Female 3/8 in. NPT, Aluminum, Each

Part Number: SUM-220072

5.0 out of 5 stars ( 20 )

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Summit Racing™ Oxygen Sensor Bungs SUM-630581

Fitting, Bung, Weld-In, Oxygen Sensor, 304 Stainless Steel, 18mm x 1.5, Each

Part Number: SUM-630581

4.0 out of 5 stars ( 1 )

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Summit Racing™ Weld-In Bungs SUM-220070

Fitting, Bung, Weld-In, Female 1/8 in. NPT, Aluminum, Each

Part Number: SUM-220070

4.47 out of 5 stars ( 17 )

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Summit Racing™ Weld-In Bungs SUM-2200616

Summit Racing™ Weld-In Bungs SUM-2200616

Fitting, Bung, Weld-in, Aluminum, -16AN, Male Threads, Each

Part Number: SUM-2200616

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-220071

Fitting, Bung, Weld-In, Female 1/4 in. NPT, Aluminum, Each

Part Number: SUM-220071

4.46 out of 5 stars ( 13 )

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Summit Racing™ Weld-In Bungs SUM-2200612

Fitting, Bung, Weld-in, Aluminum, -12AN, Male Threads, Each

Part Number: SUM-2200612

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-220073

Fitting, Bung, Weld-In, Female 1/2 in. NPT, Aluminum, Each

Part Number: SUM-220073

4.86 out of 5 stars ( 7 )

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Summit Racing™ Oxygen Sensor Bungs SUM-G2990SS

Fitting, Bung, Weld-In, Oxygen Sensor, Female 18mm x 1.5, Stainless Steel, Each

Part Number: SUM-G2990SS

4.88 out of 5 stars ( 17 )

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Summit Racing™ Weld-In Bungs SUM-2200606

Fitting, Bung, Weld-in, Aluminum, -6AN, Male Threads, Each

Part Number: SUM-2200606

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-220395

Fitting, Bung, Weld-In, Male Threads, -10 AN, Steel, Each

Part Number: SUM-220395

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Summit Racing™ Weld-In Bungs SUM-2200610

Fitting, Bung, Weld-in, Aluminum, -10AN, Male Threads, Each

Part Number: SUM-2200610

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-220018

Fitting, Bung, Weld-In, 5/8 in. Hose Barb, Aluminum, Each

Part Number: SUM-220018

5.0 out of 5 stars ( 2 )

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Rhodes Race Cars Weld-In Bungs 101-0027

Bung, Weld-In, Aluminum, Female Threads, Universal, Flanged, 3/8 in. NPT, Each

Part Number: RHC-101-0027

5.0 out of 5 stars ( 5 )

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Summit Racing™ Weld-In Bungs SUM-220023

Fitting, Bung, Weld-In, 6 AN, Male Threads. Steel, Each

Part Number: SUM-220023

5.0 out of 5 stars ( 2 )

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Summit Racing™ Oxygen Sensor Bungs SUM-630580

Fitting, Bung, Weld-In, Oxygen Sensor, Mild/Carbon Steel, 18mm x 1.5, Each

Part Number: SUM-630580

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-2200620

Fitting, Bung, Weld-in, Aluminum, -20AN, Male Threads, Each

Part Number: SUM-2200620

Not Yet Reviewed

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Summit Racing™ Weld-In Bungs SUM-220394

Weld Bung, Steel, 1/8 in.-27 NPT Female Thread, 0.750 in. Outside Diameter, Each

Part Number: SUM-220394

5.0 out of 5 stars ( 2 )

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Summit Racing™ Weld-In Bungs SUM-220017

Fitting, Bung, Weld-In, 1/2 in. Hose Barb, Aluminum, Each

Part Number: SUM-220017

Not Yet Reviewed

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Rhodes Race Cars Weld-In Bungs 101-0025

Bung, Weld-In, Aluminum, Female Threads, Universal, Flanged, 1/8 in. NPT, Each

Part Number: RHC-101-0025

4.67 out of 5 stars ( 3 )

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Rhodes Race Cars Weld-In Bungs 101-0026

Bung, Weld-In, Aluminum, Female Threads, Universal, Flanged, 1/4 in. NPT, Each

Part Number: RHC-101-0026

5.0 out of 5 stars ( 2 )

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Summit Racing™ Weld-In Bungs SUM-220016

Fitting, Bung, Weld-In, 3/8 in. Hose Barb, Aluminum, Each

Part Number: SUM-220016

5.0 out of 5 stars ( 1 )

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Rhodes Race Cars Weld-In Bungs 101-0028

Bung, Weld-In, Aluminum, Female Threads, Universal, Flanged, 1/2 in. NPT, Each

Part Number: RHC-101-0028

5.0 out of 5 stars ( 1 )

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