Aluminum Flanges | McMaster-Carr

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	Material Material	Show

	Material Material	Hide

	Type Type


Flange	Adapter

Cap	Reducing Adapter

Connector	Clamp

Locknut	Bushing

Plug

	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
6
8

	Connection Style Connection Style

	Flanged Connection Surface Flanged Connection Surface

	Flat

	Pressure Class Pressure Class

125

150

	System of Measurement System of Measurement

Inch

Metric

	Flange OD Flange OD

	Number of Bolt Holes Number of Bolt Holes

	Shape Shape

	Straight
	Cap/Plug

	Slip-On Framing Component Slip-On Framing Component

	Rail End
	Rail
	Through-Hole Rail Support
	Through-Hole Connector
	Connector
	Add-On Through-Hole Connector
	Through-Hole Reducer

	For Use With For Use With

	For Pipe Material For Pipe Material

Aluminum

	Rail OD Rail OD

	Connection Type Connection Type


Pipe	Tube

Press Fit	Hose

	For Pipe Schedule For Pipe Schedule

	40

	Thread Type Thread Type

	Maximum Pressure Maximum Pressure

	Bolt Circle Diameter Bolt Circle Diameter

	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

	For Bolt Diameter For Bolt Diameter

1/2"

5/8"

3/4"

	Bolt Hole Diameter Bolt Hole Diameter

493 Products

Pipe, Tubing, Hose, and Fittings

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.

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications.

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.

Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Also known as KF, QF, and NW fittings, these fittings are for high-vacuum applications, such as vacuum coating and heat treating, leak testing, and analyzing gases.

Clamps for Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Connect quick-clamp fittings in high-vacuum applications.

Clamps for Claw-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Connect claw-clamp high-vacuum fittings for an airtight seal.

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum

Couplings are metal, which has better durability than plastic cam-and-groove hose couplings. They consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. To connect, insert the plug into the socket and push the levers down.

Metal Cam-and-Groove Hose Couplings for Water

Metal cam-and-groove couplings have better durability than plastic cam-and-groove couplings.

Duct Flanges

Bolt flanges to equipment to start a run of duct.

Structural Framing

Aluminum Slip-On Framing and Fittings

Half the weight of steel, this aluminum framing resists corrosion in wet environments.

Carbon Fiber Slip-On Framing and Fittings

Stronger than plastic and aluminum, this is the lightest weight framing we offer. It has good resistance to chemicals and salt water.

Clamp-On Framing and Fittings

Fittings come in two pieces to wrap around rails, so you can quickly modify existing structures without disassembling. Use clamp-on framing and fittings to form temporary partitions, modular conveyors, and workstations.

Heavy Duty Clamp-On Framing and Fittings

Thick construction makes this framing strong and sturdy.

Flush-Fit Framing and Fittings

Flush connections between rails and fittings give structures a clean finished look. Use this framing for stair rails, work platforms, and workstations.

Press-Fit Framing and Fittings

No need for fasteners—friction holds this framing together. Use press-fit framing and fittings to assemble carts, enclosures, and partitions.

Pipe, Tubing, Hose, and Fittings

Low-Pressure Aluminum Threaded Pipe Flanges

Low-Pressure Aluminum Threaded Pipe Fittings

Medium-Pressure Aluminum Threaded Pipe Fittings

Aluminum Unthreaded Pipe Flanges

Quick-Clamp High-VacuumFittings for Stainless Steel Tubing

Clamps for Quick-Clamp High-VacuumFittings for Stainless Steel Tubing

Clamps for Claw-Clamp High-VacuumFittings for Stainless Steel Tubing

Metal Cam-and-Groove HoseCouplings for Chemicals and Petroleum

Metal Cam-and-Groove Hose Couplings for Water

Duct Flanges

Duct Flanges

Structural Framing

Aluminum Slip-On Framing and Fittings

Carbon Fiber Slip-On Framing and Fittings

Clamp-On Framing and Fittings

Heavy Duty Clamp-On Framing and Fittings

Flush-Fit Framing and Fittings

Press-Fit Framing and Fittings

Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Clamps for Quick-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Clamps for Claw-Clamp High-Vacuum
Fittings for Stainless Steel Tubing

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum