Steel Dampers | McMaster-Carr

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OD

0.075" to 3.75"

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Duct Size

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Closed and Ground

Open and Ground

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Compressed Length @ Maximum Load

Shape

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Damper Hardware

Finish

Aluminum Coated

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Fitting Connection

Quick-Disconnect Clamp

For Duct Shape

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Clockwise and Counterclockwise

Counterclockwise

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2,201 Products

Heating, Ventilation, and Air Conditioning

Duct Airflow Dampers

Duct Airflow Dampers

Regulate airflow through duct by adjusting from fully open to fully closed

Duct Damper Handles

Duct Damper Handles

Secure a replacement blade to your duct's damper or use to create a new damper

Duct and Fittings

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

Duct Fire Dampers

Duct Fire Dampers

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

Diffuser Dampers

Diffuser Dampers

Regulate the airflow coming out of drop-ceiling diffusers

Barometric Draft Dampers

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

Diffusers

Evenly disperse airflow into a room to maintain a consistent temperature throughout

Diffuser Collars

Diffuser Collars

Connect diffusers to duct

Power Transmission

Speed Limiters

Control the speed of movement for attached components such as doors, panels, and drill presses

Compression Springs

Compression Springs

When squeezed, springs push back to their original length

Extension Springs

Extension Springs

As stretched, springs become increasingly harder to pull

Die Springs

Withstand heavy loads with minimal compression in high-impact jobs such as punching and stamping

Gas Spring Mounts

Gas Spring Mounts

Attach gas springs to panels, lids, and doors using a bracket or stud

Shaft Couplings

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

Shear Couplings

Shear Couplings

Sever the connection between shafts when there's too much torque to protect parts from breaking

Building and Machinery Hardware

Vibration-Damping Mounts

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

Door Springs

Extend and snap back to pull storm doors and gates closed

Door Closer Arms

Door Closer Arms

Replace arms instead of the entire closer to continue to pull doors closed

Door Closers

Automatically and smoothly pull doors, storm doors, and gates closed

Door Stops

Keep doors from slamming into and damaging walls

Overhead Door Spring Winding Rods

Overhead Door Spring Winding Rods

Keep your overhead door balanced on both tracks for smooth, even opening and closing

Material Handling

Vibration-Damping Hangers

Vibration-Damping Hangers

Reduce vibration and noise in suspended equipment, such as air-handling units, pipe, and duct

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

Routing Clamp Rails

Routing Clamp Rails

Use with rail-mount routing clamps to route pressurized lines in hydraulic systems

Loop Clamps

Hold pipe snug against the mounting surface to prevent movement that may cause breakage

Pipe Hangers

Suspend pipe, conduit, and tube from threaded rods, hooks, and straps

Hitch Clamps

Strengthen the joint between your hitch insert and receiver to prevent rattling and swaying

Fluid Handling

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

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