MSS Flanges | McMaster-Carr

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	Specifications Met Specifications Met

MSS

	Pipe Size Pipe Size

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

Plug

	Connection Style Connection Style

	Material Material

	Class Class

150

300

1500

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	For Pipe Material For Pipe Material

Stainless Steel

Steel

	For Pipe Schedule For Pipe Schedule

160

XXH

Any

	System of Measurement System of Measurement

Inch

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	For Use With For Use With

	Bolt Circle Diameter Bolt Circle Diameter

	For Bolt Diameter For Bolt Diameter

	Maximum Steam Pressure Maximum Steam Pressure

	Thread Type Thread Type

NPT

	Shape Shape

	Straight
	Cap/Plug

	Connection Type Connection Type


Pipe	Tube

	Maximum Pressure Maximum Pressure

	Bolt Hole Diameter Bolt Hole Diameter

	Gender Gender

Female

Male

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

DFARS Specialty Metals
COTS-Exempt

	Fabrication Fabrication

Forged

Cast

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348 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 Unthreaded Pipe Flanges

Bolt two same-size flanges together with a gasket to create an access point within a pipe line.

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Use these heavy duty forged flanges for high-pressure applications.

Low-Pressure Stainless Steel Threaded Pipe Flanges

Also known as Class 150 flanges, these corrosion-resistant flanges are designed for low-pressure pipe applications.

Low-Pressure Steel Threaded Pipe Flanges

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

High-Pressure Steel Threaded Pipe Flanges

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

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.

Extreme-Pressure Steel Unthreaded Pipe Flanges

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

Solder-Connect Fittings for Copper Tubing

Solder these fittings to tubing for a permanent, leak-tight connection. They are also known as sweat fittings.