Reducing Flanges | McMaster-Carr

Clear All

	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
4
5
6

	Thread Type Thread Type

BSPT

NPT

	Type Type	Show

	Reducing Adapter

	Type Type	Hide


Flange	Adapter

Cap	Reducing Adapter

Stub End	Connector

Clamp	Locknut

Reducer	Bleed Ring

Bushing	Plug

Port

	Material Material

	Connection Style Connection Style

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	Pressure Class Pressure Class

125

150

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

	For Pipe Material For Pipe Material

	Bolt Circle Diameter Bolt Circle Diameter

	For Use With For Use With

	For Pipe Schedule For Pipe Schedule

	40

	For Flange Pipe Size For Flange Pipe Size

3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
6
8

	Connection Type Connection Type

	Pipe

	Shape Shape


Straight	45° Elbow

	For Bolt Diameter For Bolt Diameter

	Specifications Met Specifications Met

ASME

ASTM

MSS

	Bolt Hole Diameter Bolt Hole Diameter

	Maximum Pressure Maximum Pressure

	Maximum Steam Pressure Maximum Steam Pressure

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

Forward

How can we improve?

170 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.

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.

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 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.

Low-Pressure Aluminum Threaded Pipe Flanges

Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Flanges are aluminum, which is lightweight with good corrosion resistance.

Medium-Pressure Aluminum Threaded Pipe Fittings

Designed for medium-pressure applications, these fittings have better strength than our low-pressure aluminum pipe fittings.

Aluminum Unthreaded Pipe Flanges

Use these unthreaded flanges in low-pressure applications. Also known as Pressure Class 125 flanges.

Drain, Waste, and Vent ABS
Pipe Flanges for Chemicals

Bolt two same-size flanges together with a gasket to create an access point within a line. Flanges are an economical option for gravity-flow chemical waste systems. They are ABS plastic, which has excellent strength and impact resistance and good chemical resistance.

Aboveground Standard-Wall PVC Pipe
Flanges for Drain, Waste, and Vent

Bolt two same-size flanges together with a gasket to create an access point within a line. Also known as Schedule 40 flanges, they are the industry standard for gravity-flow drain, waste, and vent (DWV) applications.