Steel Pipe Fittings | McMaster-Carr

	Pipe Size Pipe Size

1/16
1/8
1/4
3/8
1/2
5/8
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12

	Thread Type Thread Type

	Type Type


Connector	Pipe

Adapter	Reducing Adapter

Bushing	Reducer

Plug	Union

Cap	Flange

Outlet	Locknut

Stub End	Clamp

Trap

	Material Material

	Finish Finish

Black Coated

Zinc-Phosphate Coated

	Shape Shape


Straight	90° Elbow

Tee	Cap/Plug

45° Elbow	Cross

180° Bend	Manifold

Wye	270° Bend

	Connection Style Connection Style

	For Use With For Use With

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Schedule Schedule


40	80

160	XXH

	Threading Threading

Threaded on Both Ends

Unthreaded

Fully Threaded

Threaded on One End

	For Pipe Material For Pipe Material

Steel

Iron

Brass

	For Pipe Schedule For Pipe Schedule

160

XXH

Any

	Gender Gender

Female

Male

	Class Class

	Connection Type Connection Type


Pipe	Tube

Hose

	Maximum Pressure Maximum Pressure

	Specifications Met Specifications Met

International Fuel Gas
Code

Uniform Mechanical Code

UPC

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	ID ID

	Construction Construction

Welded

Seamless

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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 Iron and Steel
Threaded Pipe and Pipe Fittings

Use in low-pressure applications up to 285 psi.

High-Pressure Iron and Steel
Threaded Pipe and Pipe Fittings

Use in high-pressure applications up to 6,000 psi.

Medium-Pressure Iron and Steel
Threaded Pipe and Pipe Fittings

Use in medium-pressure applications up to 1,400 psi.

Extreme-Pressure Steel
Threaded Pipe and Pipe Fittings

Use in extreme-pressure applications up to 10,000 psi.

Iron and Steel Unthreaded Pipe and Pipe Fittings

Pipe and fittings weld together for a permanent connection that is stronger and less likely to leak than threaded and clamp-on connections.

Iron and Steel Clamp-On Pipe and Pipe Fittings

Pipe and fittings connect with a clamp, so they can be taken apart as needed for maintenance and repair.

Iron and Steel Pipe Fittings with Flanged Ends

Bolt the flanged end of these fittings to another same-size flange, pump, or valve with a gasket to create an access point in a pipe line.

Rectangular Manifolds

Tube Fittings for Steel Tubing

Fittings have fair corrosion resistance. They are more economical than other metal tube fittings.

Hose Fittings

Connect these fittings to lengths of hose. Hose fittings are typically used in high-flow, suction, and hydraulic applications.

How to Identify and Measure Fittings

Pipe, Tubing, Hose, and Fittings

Low-Pressure Iron and SteelThreaded Pipe and Pipe Fittings

High-Pressure Iron and SteelThreaded Pipe and Pipe Fittings

Medium-Pressure Iron and SteelThreaded Pipe and Pipe Fittings

Extreme-Pressure SteelThreaded Pipe and Pipe Fittings