Galvanized Steel Duct | McMaster-Carr

	Duct Size Duct Size

3
4
5
6
7
8
9
10
11
12
13
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15
16
17
18
20
21
22
23
24
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40

	Shape Shape


Straight	90° Elbow

Adjustable- Angle Elbow	45° Elbow

Cap	Tee

Wye	30° Elbow

60° Elbow

	Material Material

	Finish Finish

Galvanized

PVC Coated

Aluminum-Zinc Alloy Coated

Painted

	ID ID

	OD OD

	Component Component

	Connection Type Connection Type

Press Fit

Interlocking Bracket

Quick-Disconnect Clamp

Twist Connect

Worm-Drive Clamp

	Gauge Gauge

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

DFARS Specialty Metals
COTS-Exempt

	End Construction End Construction

	Gender Gender

Female

Male

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

REACH Compliant

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

RoHS Compliant

	Length Length

	Width Width

	Maximum Temperature Maximum Temperature

	Duct Construction Duct Construction

Closed

Open

	Interior Surface Texture Interior Surface Texture

Ribbed

Smooth

	For Use With For Use With

Fumes

Chips and Shavings

	Construction Construction

Interlocked Strips

Double Wall

	Material Thickness Material Thickness

	Bend Radius Bend Radius

1,278 Products

About Duct Connections

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.

Quick-Disconnect Duct and Fittings

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

Sure-Seal Spiral Duct and Fittings

Fittings have gaskets which create a tight seal—you don't need to seal joints with coating or tape.

Rectangular Duct and Fittings

Often used in tight spaces, such as in walls and ceilings, rectangular duct allows you to select larger sizes without increasing duct height.

Straight-Run Fabric Duct

Evenly distribute air from fans and blowers throughout large spaces.

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.

Airflow Dampers

Regulate airflow by adjusting dampers from fully open to fully closed.

Quick-Open Duct Access Panels

The panels open and close by turning the knobs.

Fire-Rated Airflow Dampers

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

Automatic Airflow Dampers

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

Duct Access Panels

Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.

Duct Noise Reducers

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

Vibration-Damping Duct Connectors

Add a flexible joint to your system to reduce vibration caused by fans and blowers.

Gas and Chimney Vents

Gas Chimney Vents and Fittings

For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.

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.

Duct Hose and Duct Hose Fittings

High-Temperature Rigid Metal Duct Hose for Fumes

Metal interlocked strips create a rigid, durable hose that stays strong under high temperatures.

Super-Abrasion-Resistant Metal Duct
Hose for Metal Chips and Shavings

Formed by metal interlocked strips, this hose has the strength to stand up to sharp, abrasive materials.