Gasket-Sealed Ductwork | McMaster-Carr

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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	2226K45	000000


		6	6"	26	2226K46	00000
		8	8"	26	2226K47	00000
		10	10"	26	2226K48	00000
		12	12"	26	2226K49	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	2226K11	000000
6	5 7/8"	24	2226K12	00000
8	7 7/8"	24	2226K13	00000
10	9 7/8"	24	2226K14	00000
12	11 7/8"	24	2226K43	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	2226K15	000000
6	5 7/8"	24	2226K16	00000
8	7 7/8"	24	2226K17	00000
10	9 7/8"	24	2226K18	00000
12	11 7/8"	24	2226K44	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	2226K26	000000


		6	5 7/8"	24	2226K27	00000
		8	7 7/8"	24	2226K28	00000
		10	9 7/8"	24	2226K29	00000
		12	11 7/8"	24	2226K31	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	2226K37	000000
6	5 7/8"	24	2226K38	00000
8	7 7/8"	24	2226K39	00000
10	9 7/8"	24	2226K41	00000
12	11 7/8"	24	2226K42	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	2226K19	000000
8	6	7 7/8"	5 7/8"	20	2226K21	00000
10	6	9 7/8"	5 7/8"	20	2226K22	00000
10	8	9 7/8"	7 7/8"	20	2226K23	00000
12	8	11 7/8"	7 7/8"	20	2226K24	00000
12	10	11 7/8"	9 7/8"	20	2226K25	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	2226K32	000000
6	5 7/8"	24	2226K33	00000
8	7 7/8"	24	2226K34	00000
10	9 7/8"	24	2226K35	00000
12	11 7/8"	24	2226K36	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	2775K1	0000000
6	5 7/8"	10 5/8"	23 5/8"	50%	24	2775K3	000000
8	7 7/8"	12 3/4"	23 5/8"	50%	24	2775K4	000000
10	9 7/8"	14 3/8"	35 3/8"	50%	24	2775K5	000000
12	12 3/8"	16 3/4"	35 3/8"	50%	24	2775K6	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	17345K11	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	1761K105	000000	2538K503	000000	1761K371	00000


	4	3 15/16"	7"	22	1761K32	00000	2538K121	00000	1761K324	0000
	5	4 15/16"	7"	22	1761K33	00000	2538K122	00000	1761K335	0000
	6	6"	7"	22	1761K34	00000	2538K123	00000	1761K346	0000
	7	7"	7"	22	1761K629	00000	2538K764	00000	1761K352	0000
	8	8"	7"	22	1761K127	00000	2538K124	00000	1761K347	0000
	9	9"	7"	22	1761K631	00000	2538K765	00000	1761K353	0000
	10	10"	7"	22	1761K128	00000	2538K125	00000	1761K348	0000
	12	12 1/8"	7"	22	1761K129	00000	2538K126	000000	1761K349	0000
	14	14 1/8"	7"	20	1761K123	00000	2538K653	000000	1761K224	0000
	16	16 1/8"	7"	20	1761K124	00000	2538K654	000000	1761K226	0000


	18	18"	7"	20	1761K666	00000	———	0	1761K671	00000
	18	18 1/16"	7"	20	1761K373	00000	———	0	1761K671	00000
	20	20"	7"	20	1761K667	00000	———	0	1761K672	00000
	20	20 1/16"	7"	20	———	0	2538K511	000000	1761K672	00000
	22	22"	7"	20	1761K668	00000	———	0	1761K673	00000
	24	24"	7"	20	1761K669	000000	———	0	1761K674	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	6766K41	000000


		6	5 7/8"	24	6766K42	00000
		7	6 7/8"	24	6766K43	00000
		8	7 7/8"	24	6766K44	00000
		10	9 7/8"	24	6766K45	00000
		12	11 7/8"	24	6766K46	00000
		14	13 7/8"	24	6766K47	00000
		16	15 7/8"	24	6766K48	00000
		18	17 7/8"	24	6766K49	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	2041K31	0000000


				6	5 7/8"	10"	20	Neoprene	2041K32	000000
				8	7 7/8"	10"	20	Neoprene	2041K33	000000
				10	9 7/8"	10"	20	Neoprene	2041K34	000000
				12	11 7/8"	10"	20	Neoprene	2041K35	000000