10 Trade Size Duct | McMaster-Carr

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	Trade Size Trade Size	Show

	Trade Size Trade Size	Hide

2
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3.5
3 1/2
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4.5
4 1/2
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	Shape Shape


Straight	90° Elbow

Adjustable- Angle Elbow	45° Elbow

Wye	Cap

Tee	30° Elbow

	Material Material

	Finish Finish

Galvanized

PVC Coated

	System of Measurement System of Measurement

Inch

	ID ID

	Component Component

	Connection Type Connection Type

Press Fit

Quick-Disconnect Clamp

Twist Connect

	Gauge Gauge

	End Construction End Construction

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

DFARS Specialty Metals
COTS-Exempt

	Gender Gender

Male

Female

	OD OD

	Duct Construction Duct Construction

Closed

Open

	Flange Mount Type Flange Mount Type

Screw On

Weld On

	Length Length

	Overall Depth Overall Depth

	Adapter Type Adapter Type

Duct-to-Duct

Duct-to-Duct with Flange

Duct-to-Hose

Pipe-to-Duct

	Number of Mounting Holes Number of Mounting Holes

	Flange Thickness Flange Thickness

1/8"

1/4"

	Wye Angle Wye Angle

30°

45°

90°

	For Duct Shape For Duct Shape

Round

	Flange Height Flange Height

1 1/4"

1 3/8"

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179 Products

About Duct Connections

Quick-Disconnect Duct and Fittings

Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.

Standard Duct and Fittings

No need for clamps or connectors—duct and fittings have a male end that is slightly smaller than its female end for simple assembly.

Crush-Resistant Spiral Duct and Fittings

A spiral seam gives this duct greater strength and rigidity than standard duct.

Chemical-Resistant Duct and Fittings

Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes.

Sure-Seal Spiral Duct and Fittings

Gaskets create a tight seal—you don't need to seal joints with coating or tape.

Duct Flanges

Bolt flanges to equipment to start a run of duct.

Weld-On Duct Flanges

Weld flanges to equipment to start a run of duct.

Blast Gates

Control the flow of air and material through duct systems.

Easy-Install Blast Gates

Often added to existing systems, these gates install without disassembling duct. Also known as half gates.

Automatic Blast Gates

More convenient than other blast gates, these automatic gates open and close in sync with dust collectors, fume exhausters, and other machines.

Self-Cleaning Blast Gates

Use in dust collection systems. The slide pushes through the top of the gate to clear debris.

Automatic Airflow Dampers

Save energy and increase comfort by heating and cooling only the areas that need it.

Fire-Rated Airflow Dampers

In the event of a fire, these dampers automatically stop airflow through duct.

Duct Noise Reducers

These noise reducers mount directly to spiral duct to decrease noise by as much as 50%.

High-Temperature Chimney Vents and Fittings

Built to withstand temperatures up to 1000° F, these vent pipes and fittings are for use with boilers, furnaces, stoves, and other equipment that is fired by coal, gas, oil, propane, or wood.