McMaster-Carr

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	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


Adapter	Reducer

Pipe	Reducing Adapter

Connector	Bushing

Flange	Clamp

Outlet	Stub End

Trap	Union

	Connection Style Connection Style

	Material Material

	Shape Shape


Straight	45° Elbow

90° Elbow	Tee

180° Bend	270° Bend

Cross	Manifold

Wye

	For Use With For Use With

	Threading Threading

Threaded on Both Ends

Threaded on One End

Unthreaded

Fully Threaded

	Schedule Schedule


40	80

160	XXH

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Gender Gender

Female

Male

	Finish Finish

	Connection Type Connection Type


Pipe	Tube

Hose

	Specifications Met Specifications Met

ANSI

ANSI/ASME

ASME

ASTM

CISPI

DIN

Fed. Spec.

International Fuel Gas
Code

ISO

JIC

JIS

Mil. Spec.

MSS

SAE

Uniform Mechanical Code

UPC

	Maximum Pressure Maximum Pressure

	For Pipe Material For Pipe Material

	ID ID

	Wall Thickness Wall Thickness

	Class Class

	Dash Size Dash Size

	Construction Construction

Welded

Seamless

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6,669 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 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.

Low-Pressure Clamp-On Connectors

Use in low-pressure applications up to 20 psi.

Right-Angle Flow
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.

Terms and Conditions and Privacy Policy

How to Identify and Measure Fittings

Pipe and Pipe 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

Iron and Steel UnthreadedPipe and Pipe Fittings

Iron and Steel Clamp-OnPipe and Pipe Fittings

Iron and Steel PipeFittings with Flanged Ends

Low-Pressure Clamp-On Connectors

Right-Angle FlowRectangular Manifolds

Tube Fittings for Steel Tubing

Tube Fittings for Steel Tubing

Hose Fittings

Hose Fittings

Low-Pressure Iron and Steel
Threaded Pipe and Pipe Fittings

High-Pressure Iron and Steel
Threaded Pipe and Pipe Fittings

Medium-Pressure Iron and Steel
Threaded Pipe and Pipe Fittings

Extreme-Pressure Steel
Threaded Pipe and Pipe Fittings

Iron and Steel Unthreaded
Pipe and Pipe Fittings

Iron and Steel Clamp-On
Pipe and Pipe Fittings

Iron and Steel Pipe
Fittings with Flanged Ends

Right-Angle Flow
Rectangular Manifolds