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

Cap	Reducing Adapter

Stub End

	Material Material

Brass

Stainless Steel

Steel

	Connection Style Connection Style

	Pressure Class Pressure Class

150

300

1500

	For Pipe Material For Pipe Material

Stainless Steel

Steel

	For Pipe Schedule For Pipe Schedule

XXH

160

Any

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	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

	Maximum Steam Pressure Maximum Steam Pressure

	Shape Shape

	Straight
	Cap/Plug

	For Bolt Diameter For Bolt Diameter

	Connection Type Connection Type


Pipe	Tube

	Thread Type Thread Type

NPT

	Bolt Hole Diameter Bolt Hole Diameter

	Maximum Pressure Maximum Pressure

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

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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403 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.

Standard-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

High-Pressure Stainless Steel Unthreaded Pipe Flanges

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

Thin-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Also known as Schedule 10 fittings, these are thin, lightweight, and corrosion resistant.

Low-Pressure Stainless Steel Threaded Pipe Flanges

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

Iron and Steel Pipe and Pipe Fittings

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 Pressure Class 1500 flanges.

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 Pressure Class 1500 steel flanges, these have the strength to handle high pressures.

Solder-Connect Fittings for Copper Tubing

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