Steel Pipe Flanges | McMaster-Carr

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	Material Material

Steel

Iron

Bronze

Copper

	For Pipe Material For Pipe Material

Steel

	Pipe Size Pipe Size

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

	Type Type


Flange	Adapter

Reducing Adapter	Cap

Reducer

	Connection Style Connection Style

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

O-Ring Groove

	Class Class

	For Pipe Schedule For Pipe Schedule

160

XXH

Any

	System of Measurement System of Measurement

Inch

Metric

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	For Use With For Use With

	Bolt Circle Diameter Bolt Circle Diameter

	Thread Type Thread Type

	For Bolt Diameter For Bolt Diameter

	Specifications Met Specifications Met

International Fuel Gas
Code

Uniform Mechanical Code

UPC

	Shape Shape

	Straight
	Cap/Plug

	Maximum Steam Pressure Maximum Steam Pressure

	Connection Type Connection Type


Pipe	Tube

	Bolt Hole Diameter Bolt Hole Diameter

	Maximum Pressure Maximum Pressure

	Gender Gender

Female

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

DFARS Specialty Metals
COTS-Exempt

	Finish Finish

Black Coated

Galvanized

Zinc Plated

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508 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 Steel Threaded Pipe Flanges

These flanges are for low-pressure applications in noncorrosive environments.

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

FM-Approved Low-Pressure Cast
Iron Threaded Pipe Flanges

Low-Pressure Galvanized Steel Threaded Pipe Flanges

The galvanized finish on these Class 150 flanges provides fair corrosion resistance.

Medium-Pressure Steel Threaded Pipe Flanges

With better strength than our low-pressure steel flanges, these are for use in medium-pressure applications.

Medium-Pressure Galvanized
Steel Threaded Pipe Flanges

Also known as Class 300 flanges, these medium-pressure flanges have a galvanized finish for fair corrosion resistance.

High-Pressure Steel Threaded Pipe Flanges

Also known as Class 1500 steel flanges, these have the strength to handle high pressures.

High-Pressure Steel Threaded SAE Pipe Flanges

Also known as Code 61 SAE hydraulic flanges.

High-Pressure Steel Threaded
SAE Two-Piece Pipe Flanges

Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection for noncorrosive environments.

Low-Pressure Steel Unthreaded Pipe Flanges

Bolt two flanges of the same size together with a gasket to create an access point in a pipe line.

Low-Pressure Press-Connect
Steel Unthreaded Pipe Fittings

Crimp these fittings onto steel pipe to form a tightly sealed connection that’s faster than threading or welding and doesn’t require heat.

High-Pressure Steel Unthreaded Pipe Flanges

Forged for extra strength, these heavy duty unthreaded flanges can withstand high-pressure applications.

High-Pressure Steel Unthreaded SAE Pipe Flanges

Also known as Code 61 SAE hydraulic flanges.

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Class 1500 flanges.

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.

Press-Connect Fittings for Copper Tubing

Crimp these fittings to copper tubing with a crimping tool for a leak-tight connection that doesn’t require heat or soldering. They are comparable to Viega ProPress fittings.

Toilet Mounting Flanges

Pipe Suction Flanges for Hydraulic Tanks

Seal pipes passing through the top plate of a hydraulic tank.