4 Duct Size Duct Fittings | McMaster-Carr

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Adjustable-Angle Elbow

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Duct-to-Duct with Flange

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177 Products

Duct and Fittings

Standard Duct and Fittings

Standard Duct and Fittings

Deliver air for a range of HVAC applications, including exhaust and dust collection

Quick-Disconnect Duct and Fittings

Quick-Disconnect Duct and Fittings

The fastest to disassemble for dust collection and other frequently cleaned systems

Spiral Duct and Fittings

Spiral Duct and Fittings

A continuous seam reinforces duct against suction from dust collection systems

Duct Flanges

Mount to air handlers and HVAC equipment to start a run of duct

Tight-Seal Spiral Duct and Fittings

Tight-Seal Spiral Duct and Fittings

Gasketed fittings prevent leaks and the seam reinforces duct against suction from dust collection systems

Chemical-Resistant Duct and Fittings

Chemical-Resistant Duct and Fittings

Withstand corrosive gases, vapors, and fumes that would eat away at most metal duct

Other Products

Duct Blast Gates

Duct Blast Gates

Slide open and closed to control flow of air and material

Duct Airflow Dampers

Duct Airflow Dampers

Regulate airflow to sections of duct

Duct Fire Dampers

Duct Fire Dampers

Automatically close at high temperatures to help prevent the spread of fire through duct

Duct Spark Traps

Duct Spark Traps

Reduce the risk of fire by snuffing out sparks before they get into your system

Duct Flow Sights

Duct Flow Sights

Peek inside duct to monitor airflow and check for buildup and blockages

Duct Downdraft Diverters

Duct Downdraft Diverters

Prevent downdrafts from blowing back into ductwork while allowing air and fumes to vent

Duct Noise Reducers

Duct Noise Reducers

Muffle noise from high-velocity airflow and fans, blowers, and dust collectors

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)