Galvanized Steel Pipe Couplings | McMaster-Carr

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1,588 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Pipe and Fittings

Galvanized Iron and Steel Threaded Pipe and Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

The tightest tolerances of our iron and steel fittings; also known as instrumentation fittings

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant

Male threads have sealant applied for extra leak protection in low-pressure lines

Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with medium-pressure fittings; also known as Schedule 80

Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 285 psi; also known as Class 150 flanges

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe for Joining Dissimilar Metals

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe for Joining Dissimilar Metals

A plastic sleeve prevents corrosion when connecting different types of metal

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe with Sealant

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe with Sealant

Threads have sealant applied for extra leak protection in low-pressure lines

Extra-Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Extra-Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 160

High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Create an access point in high-pressure lines; also known as Class 300 flanges

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe Assortments

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe Assortments

Keep multiple lengths of low-pressure pipe nipples and pipe on hand; also known as Schedule 40

Galvanized Iron and Steel Unthreaded Pipe and Fittings

Low-Pressure Galvanized Iron and Steel Clamp-On Pipe Fittings

Low-Pressure Galvanized Iron and Steel Clamp-On Pipe Fittings

Tighten the bolts to join pipe in air, vacuum, and gravity-flow systems up to 15 psi

Low-Pressure Galvanized Iron and Steel Compression Pipe Fittings

Low-Pressure Galvanized Iron and Steel Compression Pipe Fittings

Tighten by hand for quick, leak-free connections in lines up to 125 psi

Iron and Steel Threaded Pipe and Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

Other Products

Tube Straights

Join lengths of tube to send contents in one direction

Tube Unions

Separate into three pieces so you can access your line without unthreading tube connections

Manual On/Off Valves

Manual On/Off Valves

Start and stop flow through a line

Pipe Traps

Create a seal that prevents the backflow of gas

Tube Elbows

Change the direction of flow when joining lengths of tube

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)