Straight Duct | McMaster-Carr

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	Shape Shape	Show

	Straight

	Shape Shape	Hide


Straight	90° Elbow

Adjustable- Angle Elbow	45° Elbow

Wye	Cap

Tee	30° Elbow

60° Elbow	Offset Elbow

	Material Material

	Finish Finish

	System of Measurement System of Measurement

Inch

Metric

	ID ID

	Component Component

	Connection Type Connection Type

Press Fit

Quick-Disconnect Clamp

	Gauge Gauge

	End Construction End Construction

Rolled

Crimped

Plain

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

DFARS Specialty Metals
COTS-Exempt

	OD OD

	Gender Gender

Male

Female

	Duct Construction Duct Construction

Closed

Open

	Flange Mount Type Flange Mount Type

Screw On

Weld On

	Length Length

	Width Width

	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

	Gate Material Gate Material

	Slide Material Slide Material

Steel

Stainless Steel

Plastic

	Flange Thickness Flange Thickness

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1,540 Products

Duct and Fittings

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.

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.

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.

Airflow Dampers

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

Furnace Draft Dampers

Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain consistent airflow despite changing environmental conditions.

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.

Medium-Wall (IMC) and Thick-Wall (Rigid) Conduit and Fittings

Reducing Adapters for Rigid PVC Conduit

Connect different sizes and genders of conduit.

Connectors for Rigid PVC Conduit

Join pieces of conduit.

Adapters for Rigid PVC Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Access Ports for Rigid PVC Conduit

Also known as conduit bodies, these ports provide access to wire and cable inside PVC conduit for pulling, splicing, and maintenance. They are also used to change the direction of a run.

Adapters for Medium-Wall (IMC) and
Thick-Wall (Rigid) Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Grommets for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Connect to the end of conduit or a fitting to protect wires from abrasion when being pulled.

Connectors for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Join pieces of conduit.

Bushings for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Join different sizes of conduit.

Adapters for Rigid Aluminum Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Rigid Aluminum Conduit

Join pieces of conduit.

Bushings for Rigid Aluminum Conduit

Connect different sizes of conduit.

Adapters for Rigid Stainless Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Rigid Stainless Steel Conduit

Join pieces of conduit.

Hazardous Location Conduit Bushings

Connect different sizes of conduit.

Hazardous Location Conduit Adapters

Attach conduit to a knockout in an outlet box or enclosure.

Hazardous Location Conduit Connectors

Join pieces of conduit.

Hazardous Location Conduit Access Ports

Also known as conduit bodies, these ports provide access to wire and cable inside thick-wall (rigid) metal conduit for pulling, splicing, and maintenance. They are also used to change the direction of a run.

Thin-Wall (EMT) Conduit and Fittings

Adapters for Thin-Wall (EMT) Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Thin-Wall (EMT) Steel Conduit

Join pieces of conduit.

Grommets for Thin-Wall (EMT) Steel Conduit

Slide these grommets into conduit ends to protect wire and cable from abrasion when being pulled.

Connectors for Thin-Wall (EMT) Stainless Steel Conduit

Join pieces of conduit.

Adapters for Thin-Wall (EMT) Stainless Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Choose-a-Color
Thin-Wall (EMT) Steel Conduit

Join pieces of conduit.

Adapters for Choose-a-Color
Thin-Wall (EMT) Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Access Ports for Metal Conduit

Also known as conduit bodies, these ports provide access to wire and cable inside metal conduit for pulling, splicing, and maintenance. They are also used to change the direction of a run.

Flexible Conduit and Fittings

Adapters for Flexible Metal Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Flexible Metal Conduit

Join pieces of conduit.

Adapters for Flexible Metal Conduit and Armored Cable

Attach conduit and armored cable to a knockout in an outlet box or enclosure.

Grommets for Flexible Metal
Conduit and Armored Cable

Also known as antishort bushings, these grommets slide into the ends of conduit and armored cable to protect wire and cable from sharp edges.

Adapters for Flexible Plastic Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Grommets for Flexible Plastic Conduit

Preventing wear and cracks, these grommets shield the sections of your conduit that rub and bang against nearby components.

Adapters for Choose-a-Color Flexible Plastic Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Choose-a-Color Flexible Plastic Conduit

Join pieces of conduit.

Adapters for Liquid-Tight Flexible Plastic Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Liquid-Tight Flexible Plastic Conduit

Join pieces of conduit.

Fittings for Liquid-Tight Flexible Metal Conduit

These fittings seal out liquids when connecting liquid-tight flexible metal conduit to a knockout in an outlet box or enclosure.

Fittings for Shielded Flexible Plastic Conduit

Made of brass, these adapters provide electromagnetic interference (EMI) protection when connecting shielded flexible plastic conduit to a knockout in an outlet box or enclosure.

Continuous-Flex Conduit and Fittings

Fittings for Continuous-Flex Plastic Conduit

One end twists into a piece of conduit for a quick connection; the other end attaches to a knockout in an outlet box or enclosure.

Fittings for Continuous-Flex Liquid-Tight Plastic Conduit

These fittings seal out liquid when used with continuous-flex liquid-tight plastic conduit.

Conduit Adapters

Conduit Reducing Adapters

Transition between conduit sizes and types.

Conduit Adapters

Transition between types of conduit.

Design-Your-Own Dust Collector Duct System

Use these components to put together a duct system to collect sawdust, chips, shavings, and granular material from woodworking operations.

Duct and Fittings

Quick-Disconnect Duct and Fittings

Standard Duct and Fittings

Crush-Resistant Spiral Duct and Fittings

Chemical-Resistant Duct and Fittings

Sure-Seal Spiral Duct and Fittings

Rectangular Duct and Fittings

Straight-Run Fabric Duct

Duct Flanges

Weld-On Duct Flanges

Blast Gates

Easy-Install Blast Gates

Automatic Blast Gates

Self-Cleaning Blast Gates

Automatic Airflow Dampers

Fire-Rated Airflow Dampers

Airflow Dampers

Furnace Draft Dampers

Duct Noise Reducers

Vibration-Damping Duct Connectors

Gas and Chimney Vents

Gas Chimney Vents and Fittings

High-Temperature Chimney Vents and Fittings

Medium-Wall (IMC) and Thick-Wall (Rigid) Conduit and Fittings

Reducing Adapters for Rigid PVC Conduit

Connectors for Rigid PVC Conduit

Adapters for Rigid PVC Conduit

Access Ports for Rigid PVC Conduit

Adapters for Medium-Wall (IMC) andThick-Wall (Rigid) Steel Conduit

Grommets for Medium-Wall (IMC)and Thick-Wall (Rigid) Steel Conduit

Connectors for Medium-Wall (IMC)and Thick-Wall (Rigid) Steel Conduit

Bushings for Medium-Wall (IMC)and Thick-Wall (Rigid) Steel Conduit

Adapters for Rigid Aluminum Conduit

Connectors for Rigid Aluminum Conduit

Bushings for Rigid Aluminum Conduit

Adapters for Rigid Stainless Steel Conduit

Connectors for Rigid Stainless Steel Conduit

Hazardous Location Conduit Bushings

Hazardous Location Conduit Adapters

Hazardous Location Conduit Connectors

Hazardous Location Conduit Access Ports

Thin-Wall (EMT) Conduit and Fittings

Adapters for Thin-Wall (EMT) Steel Conduit

Connectors for Thin-Wall (EMT) Steel Conduit

Grommets for Thin-Wall (EMT) Steel Conduit

Connectors for Thin-Wall (EMT) Stainless Steel Conduit

Adapters for Thin-Wall (EMT) Stainless Steel Conduit

Connectors for Choose-a-ColorThin-Wall (EMT) Steel Conduit

Adapters for Choose-a-ColorThin-Wall (EMT) Steel Conduit

Access Ports for Metal Conduit

Access Ports for Metal Conduit

Flexible Conduit and Fittings

Adapters for Flexible Metal Conduit

Connectors for Flexible Metal Conduit

Adapters for Flexible Metal Conduit and Armored Cable

Grommets for Flexible MetalConduit and Armored Cable

Adapters for Flexible Plastic Conduit

Grommets for Flexible Plastic Conduit

Adapters for Choose-a-Color Flexible Plastic Conduit

Connectors for Choose-a-Color Flexible Plastic Conduit

Adapters for Liquid-Tight Flexible Plastic Conduit

Connectors for Liquid-Tight Flexible Plastic Conduit

Fittings for Liquid-Tight Flexible Metal Conduit

Fittings for Shielded Flexible Plastic Conduit

Continuous-Flex Conduit and Fittings

Fittings for Continuous-Flex Plastic Conduit

Fittings for Continuous-Flex Liquid-Tight Plastic Conduit

Conduit Adapters

Conduit Reducing Adapters

Conduit Adapters

Design-Your-Own Dust Collector Duct System

Design-Your-Own Dust Collector Duct System

Adapters for Medium-Wall (IMC) and
Thick-Wall (Rigid) Steel Conduit

Grommets for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Connectors for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Bushings for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Connectors for Choose-a-Color
Thin-Wall (EMT) Steel Conduit

Adapters for Choose-a-Color
Thin-Wall (EMT) Steel Conduit

Grommets for Flexible Metal
Conduit and Armored Cable