Gasket-Sealed Duct | McMaster-Carr

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EAR99

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99 Products

Tight-Seal Spiral Duct and Fittings

Gasketed fittings prevent leaks between connections without the need for tape or other sealants. Duct has a continuous seam that reinforces it for strength and long life. The rigid construction keeps its shape, even against suction from dust collectors. Duct is smooth on the inside for efficient airflow. Because of its attractive look, spiral duct is often used for exposed heating and cooling systems.

Duct

Pair with compatible fittings and accessories.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

			5 ft. Long
	Duct Size	ID	Ga.		Each
Galvanized Steel



		4	4"	26	0000000	000000


		6	6"	26	0000000	00000
		8	8"	26	0000000	00000
		10	10"	26	0000000	00000
		12	12"	26	0000000	00000

90° Elbow Connectors

Change the direction of airflow when joining lengths of duct.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

		Galvanized Steel with EPDM Gasket
Duct Size	OD	Ga.		Each
4	3 7/8"	24	0000000	000000
6	5 7/8"	24	0000000	00000
8	7 7/8"	24	0000000	00000
10	9 7/8"	24	0000000	00000
12	11 7/8"	24	0000000	00000

45° Elbow Connectors

Change the direction of airflow when joining lengths of duct.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

		Galvanized Steel with EPDM Gasket
Duct Size	OD	Ga.		Each
4	3 7/8"	24	0000000	000000
6	5 7/8"	24	0000000	00000
8	7 7/8"	24	0000000	00000
10	9 7/8"	24	0000000	00000
12	11 7/8"	24	0000000	00000

Straight Connectors

Join two lengths of duct.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

			Galvanized Steel with EPDM Gasket
	Duct Size	OD	Ga.		Each
Male



		4	3 7/8"	24	0000000	000000


		6	5 7/8"	24	0000000	00000
		8	7 7/8"	24	0000000	00000
		10	9 7/8"	24	0000000	00000
		12	11 7/8"	24	0000000	00000

Tee Connectors

Split or merge airflow paths.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

		Galvanized Steel with EPDM Gasket
Duct Size	OD	Ga.		Each
4	3 7/8"	24	0000000	000000
6	5 7/8"	24	0000000	00000
8	7 7/8"	24	0000000	00000
10	9 7/8"	24	0000000	00000
12	11 7/8"	24	0000000	000000

Straight Reducers

Transition between duct of different diameters. Reducers also join larger duct with smaller duct that connects to equipment.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

Duct Size		OD		Galvanized Steel with EPDM Gasket
(A)	(B)	(A)	(B)	Ga.		Each
6	4	5 7/8"	3 7/8"	20	0000000	000000
8	6	7 7/8"	5 7/8"	20	0000000	00000
10	6	9 7/8"	5 7/8"	20	0000000	00000
10	8	9 7/8"	7 7/8"	20	0000000	00000
12	8	11 7/8"	7 7/8"	20	0000000	00000
12	10	11 7/8"	9 7/8"	20	0000000	00000

End Caps

Cover unused duct openings to prevent air from leaking, dust from escaping, and debris from entering. End caps are often used to seal duct after changes to your system or equipment. To make modifications or expand your line, remove the cap.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

		Galvanized Steel with EPDM Gasket
Duct Size	OD	Ga.		Each
4	3 7/8"	24	0000000	000000
6	5 7/8"	24	0000000	00000
8	7 7/8"	24	0000000	00000
10	9 7/8"	24	0000000	00000
12	11 7/8"	24	0000000	00000

Duct Noise Reducers

Muffle noise from high-velocity airflow and fans, blowers, and dust collectors. These reducers are insulated to decrease noise levels in your facility by half.

Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.

		Overall			Galvanized Steel with Rubber Gasket
Duct Size	OD	Dia.	Lg.	Sound Absorbed	Ga.		Each
4	3 7/8"	8 1/4"	23 5/8"	50%	24	000000	0000000
6	5 7/8"	10 5/8"	23 5/8"	50%	24	000000	000000
8	7 7/8"	12 3/4"	23 5/8"	50%	24	000000	000000
10	9 7/8"	14 3/8"	35 3/8"	50%	24	000000	000000
12	12 3/8"	16 3/4"	35 3/8"	50%	24	000000	000000

Duct Floor Sweeps

Get dust and debris off your floor and into your collection system. Open the hinged door of these sweeps and push material inside so it can be sucked away.

Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.

		Overall			Galvanized Steel
Duct Size	ID	Wd.	Ht.	Dp.	Ga.		Each
6	6"	11 1/8"	18 1/4"	6"	18	00000000	0000000

Quick-Disconnect Duct and Fittings

The fastest ductwork to disassemble for dust collection and other frequently cleaned systems. Join sections with quick-release clamps that open and close with a flip of the latch. Since you don’t need screws, welds, or tools, the installation time is half that of other duct types.

Adjustment Sleeves

Close gaps between sections of duct without disassembling the whole line. To install these sleeves, cut the end of your duct and place the O-ring on the cut piece. Then, slide the sleeve on and clamp in place.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

Corrosion-Resistant 304 Stainless Steel—The most corrosion-resistant metal duct we sell. It won’t rust or degrade in systems that exhaust chemical fumes or vent heat from industrial ovens and dryers.

Duct Adjustment Sleeves								Replacement O-Rings
				Galvanized Steel		Corrosion-Resistant 304 Stainless Steel
Duct Size	ID	Max. Sleeve Extension	Ga.		Each		Each		Each



	3	3 1/8"	7"	22	00000000	000000	00000000	000000	00000000	00000


	4	3 15/16"	7"	22	0000000	00000	00000000	00000	00000000	0000
	5	4 15/16"	7"	22	0000000	00000	00000000	00000	00000000	0000
	6	6"	7"	22	0000000	00000	00000000	00000	00000000	0000
	7	7"	7"	22	00000000	00000	00000000	00000	00000000	0000
	8	8"	7"	22	00000000	00000	00000000	00000	00000000	0000
	9	9"	7"	22	00000000	00000	00000000	00000	00000000	0000
	10	10"	7"	22	00000000	00000	00000000	00000	00000000	0000
	12	12 1/8"	7"	22	00000000	00000	00000000	000000	00000000	0000
	14	14 1/8"	7"	20	00000000	00000	00000000	000000	00000000	0000
	16	16 1/8"	7"	20	00000000	00000	00000000	000000	00000000	0000


	18	18"	7"	20	00000000	00000	———	0	00000000	00000
	18	18 1/16"	7"	20	00000000	00000	———	0	00000000	00000
	20	20"	7"	20	00000000	00000	———	0	00000000	00000
	20	20 1/16"	7"	20	———	0	00000000	000000	00000000	00000
	22	22"	7"	20	00000000	00000	———	0	00000000	00000
	24	24"	7"	20	00000000	000000	———	0	00000000	00000

Standard Duct and Fittings

Deliver air for a range of HVAC applications, including exhaust and dust collection. Our basic duct, the round shape creates smoother, more efficient airflow than rectangular and oval duct. The male end is slightly smaller than the female, so sections join without clamps or tools.

Straight Collars

Male,

Polyethylene

Foam Gasket

Link rectangular duct systems to equipment that uses round duct. Cut a hole, install the collar, and connect a piece of round duct.

Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

Polyethylene Foam Gasket—The flange has an adhesive-backed gasket to bond the connection until you fasten with screws. The gasket also prevents leaks.

			Galvanized Steel with Polyethylene Foam Gasket
	Duct Size	OD	Ga.		Each
Male



		5	4 7/8"	24	0000000	000000


		6	5 7/8"	24	0000000	00000
		7	6 7/8"	24	0000000	00000
		8	7 7/8"	24	0000000	00000
		10	9 7/8"	24	0000000	00000
		12	11 7/8"	24	0000000	00000
		14	13 7/8"	24	0000000	00000
		16	15 7/8"	24	0000000	00000
		18	17 7/8"	24	0000000	00000

Airflow Dampers

Gasketed Airflow Damper

The simplest, most reliable way to regulate airflow in standard duct. Turn the lever to adjust the blade.

Gasketed Airflow Damper—The blade has a rubber gasket to prevent leaks better than other dampers.

Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.

						Galvanized Steel
	Duct Size	OD	Overall Lg.	Ga.	Gasket Material		Each
Gasketed Airflow Damper







				Male

				4	3 7/8"	10"	20	Neoprene	0000000	0000000


				6	5 7/8"	10"	20	Neoprene	0000000	000000
				8	7 7/8"	10"	20	Neoprene	0000000	000000
				10	9 7/8"	10"	20	Neoprene	0000000	000000
				12	11 7/8"	10"	20	Neoprene	0000000	000000