Duct Shutter Vents | McMaster-Carr

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	Trade Size Trade Size

	Component Component

Vent Cap

	Material Material

	Finish Finish

Galvanized

Painted

	Shape Shape

	Cap
	Straight

	ID ID

	Vent Type Vent Type

Exhaust

Intake

	For Duct Trade Size For Duct Trade Size

	Mounting Location Mounting Location

	Gender Gender

Female

Male

	Gauge Gauge

	End Construction End Construction

Plain

Crimped

	Diffuser Shape Diffuser Shape

Square

Round

	OD OD

	Color Color

	White
	Clear

	Cover Style Cover Style

Louvered

Perforated

Plaque

	Length Length

11 1/4"

20" to 35"

23 3/4"

31"

	Minimum Width Minimum Width

9"-14"

10"-14"

11"-18"

15"-25"

	Depth Depth

2 1/2"

3 1/4"

3 1/2"

	Height Height

	Mount Type Mount Type

	Opening/Closing Style Opening/Closing Style

Butterfly

Radial

	Louvered Diffuser Style Louvered Diffuser Style

1-Tier

2-Tier

3-Tier

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72 Products

About Duct Connections

No need for clamps or connectors—duct and fittings press-fit together. Male ends are crimped or tapered, making them slightly smaller than a female end for simple assembly.

Galvanized steel has good corrosion resistance. Aluminum is more lightweight than steel and stainless steel and has good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Vent Caps

Exhaust Vent

Intake Vent

Galvanized Steel
Trade Size	Female ID	Male OD	Includes	End Construction	Gauge		Each
Exhaust Vent
4	4"	__	Damper	Plain	30	00000000	000000
5	5"	__	Damper	Plain	30	00000000	00000
6	6"	__	Damper	Plain	30	00000000	00000
7	7"	__	Damper	Plain	30	00000000	00000
8	8"	__	Damper	Plain	30	00000000	00000
Intake Vent
4	__	3 7/8"	Screen	Crimped	30	00000000	00000
5	__	4 7/8"	Screen	Crimped	30	00000000	00000
6	__	5 7/8"	Screen	Crimped	30	00000000	00000
7	__	6 7/8"	Screen	Crimped	30	00000000	00000
8	__	7 7/8"	Screen	Crimped	30	00000000	00000
Aluminum
Exhaust Vent
3	3"	__	Damper	Plain	24	0000000	00000
4	4"	__	Damper	Plain	24	0000000	00000
6	6"	__	Damper	Plain	24	0000000	00000
8	8"	__	Damper	Plain	24	0000000	00000

Dampers for Drop-Ceiling Diffusers

Butterfly Damper

Radial Damper

For use with drop-ceiling diffusers and ready-to-connect drop-ceiling diffusers, these dampers regulate airflow. Dampers mount to a collar.

Dampers with a butterfly opening/closing style open on a middle hinge. The removable handle adjusts the damper to control airflow and is easier to adjust than dampers with a radial opening/closing style.

Dampers with a radial opening/closing style open in a circle for more precise airflow than dampers with a butterfly opening/closing style.

Butterfly Opening/Closing Style
For Duct Trade Size	Material		Each
6	Galvanized Steel	00000000	000000
8	Galvanized Steel	00000000	00000
10	Galvanized Steel	00000000	00000
12	Galvanized Steel	00000000	00000
14	Galvanized Steel	00000000	00000
Radial Opening/Closing Style
6	Galvanized Steel	000000000	00000
8	Galvanized Steel	000000000	00000
10	Galvanized Steel	000000000	00000
12	Galvanized Steel	000000000	00000
14	Galvanized Steel	000000000	00000

Ready-to-Connect Drop-Ceiling Diffusers

No additional fittings or collars needed—connect to round duct with the included collar. These diffusers fit in the grid of a drop ceiling to evenly disperse airflow and maintain a consistent temperature throughout the space.

Dampers with a radial opening/closing style open in a circle for more precise airflow than dampers with a butterfly opening/closing style.

Diffusers

Louvered

Perforated

Plaque

Diffusers
	For Ceiling Tile											Dampers with Butterfly Opening/Closing		Dampers with Radial Opening/Closing
For Duct Trade Size	Wd., ft.	Lg., ft.	OD	Gender	Material	Color	Back Panel Material	Louvered Diffuser Style	Includes		Each		Each		Each
Louvered
6	2	2	5.875"	Male	Painted Steel	White	Steel	3-Tier	Collar	000000000	000000	00000000	000000	000000000	000000
6	2	2	6"	Male	Painted Steel	White	Steel	2-Tier	Collar	00000000	00000	00000000	00000	000000000	00000
8	2	2	7.875"	Male	Painted Steel	White	Steel	3-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
8	2	2	8"	Male	Painted Steel	White	Steel	2-Tier	Collar	00000000	00000	00000000	00000	000000000	00000
10	2	2	9.875"	Male	Painted Steel	White	Steel	3-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
10	2	2	10"	Male	Painted Steel	White	Steel	2-Tier	Collar	00000000	00000	00000000	00000	000000000	00000
12	2	2	11.875"	Male	Painted Steel	White	Steel	3-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
12	2	2	12"	Male	Painted Steel	White	Steel	2-Tier	Collar	00000000	00000	00000000	00000	000000000	00000
14	2	2	13.875"	Male	Painted Steel	White	Steel	3-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
14	2	2	14"	Male	Painted Steel	White	Steel	2-Tier	Collar	00000000	00000	00000000	00000	000000000	00000
Perforated
6	2	2	6"	Male	Painted Steel	White	Steel	__	Collar	000000000	00000	00000000	00000	000000000	00000
8	2	2	8"	Male	Painted Steel	White	Steel	__	Collar	000000000	00000	00000000	00000	000000000	00000
10	2	2	10"	Male	Painted Steel	White	Steel	__	Collar	000000000	00000	00000000	00000	000000000	00000
12	2	2	12"	Male	Painted Steel	White	Steel	__	Collar	000000000	00000	00000000	00000	000000000	00000
14	2	2	14"	Male	Painted Steel	White	Steel	__	Collar	000000000	00000	00000000	00000	000000000	00000
Plaque
6	2	2	6"	Male	Painted Steel	White	Steel	1-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
8	2	2	8"	Male	Painted Steel	White	Steel	1-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
10	2	2	10"	Male	Painted Steel	White	Steel	1-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
12	2	2	12"	Male	Painted Steel	White	Steel	1-Tier	Collar	000000000	00000	00000000	00000	000000000	00000
14	2	2	14"	Male	Painted Steel	White	Steel	1-Tier	Collar	000000000	00000	00000000	00000	000000000	00000

Touch-Up Paint Pens for Metal

Prep, paint, and seal small scratches on metal surfaces with these pens.

			Dry Time
Container Size, oz.	Composition	Formulation	Touch, sec.	O'all, min.	Max. Temp.	For Use Outdoors	For Use On	Color (Appearance)		Each
0.3	Solvent Based	Acrylic Lacquer	30	1	Not Rated	No	Aluminum, Steel, Iron	White (Gloss)	00000000	000000

Snap-On Collars for Drop-Ceiling Diffusers

Connect drop-ceiling diffusers to duct. Use the included push-in fasteners to attach collar to diffuser.

For Duct Trade Size	OD	Gender	Material		Each
6	5 15/16"	Male	Galvanized Steel	00000000	000000
8	7 15/16"	Male	Galvanized Steel	00000000	00000
10	9 15/16"	Male	Galvanized Steel	00000000	00000
12	11 15/16"	Male	Galvanized Steel	00000000	00000

Ready-to-Connect Moisture-Resistant
Drop-Ceiling Diffusers

A vapor barrier provides moisture protection as these diffusers evenly disperse airflow and maintain a consistent temperature throughout the space. No additional fittings or collars needed—connect to round duct with the included collar. Diffusers fit in the grid of a drop ceiling.

Diffusers with R-6 insulation thermal resistance maintain temperature more effectively than diffusers with R-1 thermal resistance.

Dampers with a radial opening/closing style open in a circle for more precise airflow than dampers with a butterfly opening/closing style.

Diffusers

Diffusers
	For Ceiling Tile									Dampers with Butterfly Opening/Closing		Dampers with Radial Opening/Closing		Insulation Blankets
For Duct Trade Size	Wd., ft.	Lg., ft.	OD	Gender	Material	Color	Insulation Thermal Resistance		Each		Each		Each		Each
Louvered
6	2	2	6"	Male	Painted Steel	White	R-1	00000000	000000	00000000	000000	000000000	000000	000000000	000000
6	2	2	6"	Male	Painted Steel	White	R-6	000000000	00000	00000000	00000	000000000	00000	000000000	00000
8	2	2	8"	Male	Painted Steel	White	R-1	00000000	00000	00000000	00000	000000000	00000	000000000	00000
8	2	2	8"	Male	Painted Steel	White	R-6	000000000	00000	00000000	00000	000000000	00000	000000000	00000
10	2	2	10"	Male	Painted Steel	White	R-1	00000000	00000	00000000	00000	000000000	00000	000000000	00000
10	2	2	10"	Male	Painted Steel	White	R-6	000000000	00000	00000000	00000	000000000	00000	000000000	00000
12	2	2	12"	Male	Painted Steel	White	R-1	00000000	00000	00000000	00000	000000000	00000	000000000	00000
12	2	2	12"	Male	Painted Steel	White	R-6	000000000	00000	00000000	00000	000000000	00000	000000000	00000
14	2	2	14"	Male	Painted Steel	White	R-1	000000000	00000	00000000	00000	000000000	00000	000000000	00000
14	2	2	14"	Male	Painted Steel	White	R-6	000000000	00000	00000000	00000	000000000	00000	000000000	00000

Touch-Up Paint Pens for Metal

Prep, paint, and seal small scratches on metal surfaces with these pens.

			Dry Time
Container Size, oz.	Composition	Formulation	Touch, sec.	O'all, min.	Max. Temp.	For Use Outdoors	For Use On	Color (Appearance)		Each
0.3	Solvent Based	Acrylic Lacquer	30	1	Not Rated	No	Aluminum, Steel, Iron	White (Gloss)	00000000	000000

Ready-to-Connect Ceiling Diffusers

Round

Square

Diffusers come with a collar and damper already in place for simple installation. They evenly disperse airflow into a room to maintain a consistent temperature throughout the space. Collar is adjustable to fit a range of duct sizes.

Made of plastic, these diffusers are impact, abrasion, and chemical resistant.

		Overall
Diffuser Shape	For Duct Trade Size	Dia.	Lg.	Wd.	Material	Color	Mounting Fasteners Included		Each
Round	6, 7, 8	12 1/8"	__	__	Plastic	White	Yes	000000	000000
Square	6, 7, 8	__	11 1/4"	11 1/4"	Plastic	White	Yes	000000	00000

Air Diverters

Guide air toward your workspace or deflect unwanted drafts with these diverters and covers. They fit over HVAC vents, diffusers, and registers to direct hot and cold air.

Diverters direct air without restricting flow. Covers seal metal registers on walls and floors, so air goes to other vents instead. To adhere to registers, they’re magnetic.

Slide-in-mount diverters fit between your diffuser and a drop ceiling grid.

Adhesive-mount diverters stick under furniture and have an adjustable length to fit different sizes of furniture. Use the included clips to hold them together when they’re extended.

Magnet-mount diverters attach to metal registers on your wall, baseboard, and floor with the included magnets. For some, you can use screws (not included) to mount them to plastic and wood vents. All have adjustable width to fit a variety of vent sizes. Made of polycarbonate, they’re durable and resist cracking. Diverters with a removable filter trap dust, pollen, and lint.

Ceiling Diverters

Ceiling-Mount on Side

Ceiling-Mount on Corner

	For Ceiling Tile
Mounting Orientation	Wd., ft.	Lg., ft.	Lg.	Wd.	Dp.	Material	Color		Each
Slide-In Mount
Side	2	2	23 3/4"	12"	2 1/2"	Polystyrene Plastic	White	0000000	000000
Corner	2	2	31"	16"	2 1/2"	Polystyrene Plastic	White	0000000	00000

Wall Diverters

Wall Mount

Magnet or Screw Mount
Ht.	Wd.	Dp.	Material	Color	Mounting Fasteners Included	Mounting Slot Wd.		Each
5 1/2"	11"-18"	3"	Polycarbonate Plastic	Clear	No	1/8"	0000000	00000

Floor Diverters

Floor Diverter

Floor Diverter with Removable Filter

Magnet Mount
Ht.	Wd.	Dp.	Material	Color	Features		Each
2 3/4"	9"-14"	3 1/2"	Polycarbonate Plastic	Clear	__	0000000	00000
2 3/4"	10"-14"	3 1/2"	Polycarbonate Plastic	Clear	Removable Filter	0000000	0000