Butt Weld Bungs | McMaster-Carr

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142 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these corrosion-resistant fittings in a low-pressure pipe line.

Premium Low-Pressure Stainless Steel
Threaded Pipe Fittings with Certification

Unlike other stainless steel fittings, these are made in the U.S.A. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition.

Medium-Pressure Stainless
Steel Threaded Pipe Fittings

Choose these fittings when you want the same high-quality found in our low-pressure pipe fittings, but need more strength to handle higher pressures.

High-Pressure Stainless
Steel Threaded Pipe Fittings

Use these heavy duty, corrosion-resistant fittings in high-pressure flow applications.

High-Pressure Socket-Connect
Stainless Steel Unthreaded Pipe Fittings

Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn't need to align perfectly to the pipe. Slip the pipe into the socket and weld.

Iron and Steel Pipe and Pipe Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.

High-Pressure Galvanized
Steel Threaded Pipe Fittings

A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Pressure Class 3000 fittings.

Extreme-Pressure Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

High-Pressure Socket-Connect
Steel Unthreaded Pipe Fittings

Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn't need to align perfectly to the pipe. Slide the pipe into the socket and weld.

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How to Identify and Measure Fittings

Stainless Steel Pipe and Pipe Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

Premium Low-Pressure Stainless Steel
Threaded Pipe Fittings with Certification

Medium-Pressure Stainless
Steel Threaded Pipe Fittings

High-Pressure Stainless
Steel Threaded Pipe Fittings

High-Pressure Socket-Connect
Stainless Steel Unthreaded Pipe Fittings

Iron and Steel Pipe and Pipe Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

High-Pressure Galvanized
Steel Threaded Pipe Fittings

Extreme-Pressure Steel Threaded Pipe Fittings

High-Pressure Socket-Connect
Steel Unthreaded Pipe Fittings

How to Identify and Measure Fittings

Stainless Steel Pipe and Pipe Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

Premium Low-Pressure Stainless SteelThreaded Pipe Fittings with Certification

Medium-Pressure StainlessSteel Threaded Pipe Fittings

High-Pressure StainlessSteel Threaded Pipe Fittings

High-Pressure Socket-ConnectStainless Steel Unthreaded Pipe Fittings

Iron and Steel Pipe and Pipe Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

High-Pressure GalvanizedSteel Threaded Pipe Fittings

Extreme-Pressure Steel Threaded Pipe Fittings

High-Pressure Socket-ConnectSteel Unthreaded Pipe Fittings

Premium Low-Pressure Stainless Steel
Threaded Pipe Fittings with Certification

Medium-Pressure Stainless
Steel Threaded Pipe Fittings

High-Pressure Stainless
Steel Threaded Pipe Fittings

High-Pressure Socket-Connect
Stainless Steel Unthreaded Pipe Fittings

High-Pressure Galvanized
Steel Threaded Pipe Fittings

High-Pressure Socket-Connect
Steel Unthreaded Pipe Fittings