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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Results 1 - 25 of 104

Racing Automotive Group Performance Aluminum Weld-In Bungs 8BUNG

Performance Fittings Aluminum weld-in Bung -8

Part Number: RAU-8BUNG

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Racing Automotive Group Performance Aluminum Weld-In Bungs 10BUNG

Performance Fittings Aluminum Weld-in Bung -10

Part Number: RAU-10BUNG

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Racing Automotive Group Performance Aluminum Weld-In Bungs 12BUNG

Performance Fittings Aluminum Weld-in Bung -12

Part Number: RAU-12BUNG

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Racing Automotive Group Performance Aluminum Weld-In Bungs 16BUNG

Performance Fittings Aluminum Weld-in Bung -16

Part Number: RAU-16BUNG

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Racing Automotive Group Performance Aluminum Weld-In Bungs 6BUNG

Performance Fittings Aluminum weld-in Bung

Part Number: RAU-6BUNG

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Racing Automotive Group Performance Aluminum Weld-In Bungs 20BUNG

Fitting, Bung, Weld-In, Male 20 AN, Aluminum, Each

Part Number: RAU-20BUNG

Not Yet Reviewed

Estimated Ship Date: Oct 8, 2025 if ordered today

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Estimated Ship Date: Oct 8, 2025 if ordered today

Vibrant Performance Weld Bungs 11153

Weld Bung, Aluminum, - 10 AN Male Thread, 1.125 in. Outside Diameter, Each

Part Number: VPE-11153

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11155

Weld Bung, Aluminum, - 16 AN Male Thread, 1.625 in. Outside Diameter, Each

Part Number: VPE-11155

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11154

Weld Bung, Aluminum, - 12 AN Male Thread, 1.375 in. Outside Diameter, Each

Part Number: VPE-11154

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Allstar Performance Weld-On Bungs ALL50765

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

Part Number: AAF-ALL50765

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11170

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

Part Number: VPE-11170

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11151

Weld Bung, Aluminum, - 6 AN Male Thread, 0.875 in. Outside Diameter, Each

Part Number: VPE-11151

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11152

Weld Bung, Aluminum, - 8 AN Male Thread, 1.000 in. Outside Diameter, Each

Part Number: VPE-11152

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11161

Bung, Weld, T6061 Billet Aluminum, -6 AN Female Threads, 0.875 in. O.D., Each

Part Number: VPE-11161

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

ARP Weld Bungs 800-8116

ARP Weld Bungs 800-8116

Fitting, Bung, Weld-In, Female -16 AN, Aluminum, Each

Part Number: ARP-800-8116

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11156

Weld Bung, 6061 Aluminum, - 20 AN Male Thread, 1.750 in. Outside Diameter, Each

Part Number: VPE-11156

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11171

Weld Bung, Aluminum, 1/4 in.-18 NPT Female Thread, 0.875 in. Outside Diameter, Each

Part Number: VPE-11171

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11172

Bung, Weld, T6061 Billet Aluminum, 3/8-18 in. NPT Female Threads, 1.000 in. O.D., Each

Part Number: VPE-11172

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

ARP Weld Bungs 800-8117

Fitting, Bung, Weld-In, Female O-ring -20 AN, Aluminum, Each

Part Number: ARP-800-8117

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11180

Bung, Weld-In, Aluminum, Hose Barb, Universal, 0.250 in., Each

Part Number: VPE-11180

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11291

Weld Bung, Aluminum, Female Threads with Black Aluminum Cap, 2.000 in. Outside Diameter, Each

Part Number: VPE-11291

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Allstar Performance Weld-On Bungs ALL50766

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

Part Number: AAF-ALL50766

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

ARP Weld Bungs 800-8114

Fitting, Bung, Weld-In, Female O-ring 10 AN, Aluminum, Each

Part Number: ARP-800-8114

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11150

Weld Bung, Aluminum, - 4 AN Male Thread, 0.750 in. Outside Diameter, Each

Part Number: VPE-11150

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Vibrant Performance Weld Bungs 11181

Bung, Weld-In, Aluminum, Hose Barb, Universal, 0.375 in., Each

Part Number: VPE-11181

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

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