Spiral Duct Fittings | McMaster-Carr

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Spiral Duct and Fittings

Reinforced with a continuous seam, this duct keeps its shape, even against suction from dust collection systems. On the inside, duct is smooth 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.

Chemical-Resistant PVC-Coated Steel—This duct combines the strength of steel with the chemical resistance of plastic. More economical than 304 stainless steel and stronger than PVC, it’s often used to exhaust corrosive gases, vapors, and fumes.

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.

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



		3	3"	26	5078K385	000000	26	5078K16	000000


		4	4"	26	5078K71	00000	26	5078K19	00000
		5	5"	26	5078K72	00000	26	5078K22	00000
		6	6"	26	5078K73	00000	26	5078K15	00000
		7	7"	26	5078K367	00000	26	5078K368	00000
		8	8"	26	5078K74	00000	26	5078K17	00000
		9	9"	26	5078K371	00000	26	5078K372	00000
		10	10"	26	5078K75	00000	26	5078K18	00000
		12	12"	26	5078K76	00000	26	5078K21	00000
		14	14"	24	5078K78	00000	24	5078K81	000000
		16	16"	24	5078K79	00000	24	5078K82	000000


		18	18"	24	5078K375	00000	24	5078K374	000000
		20	20"	—	———	0	24	5078K376	000000
		22	22"	24	5078K379	00000	24	5078K378	000000
		24	24"	24	5078K383	000000	24	5078K382	000000


		Chemical-Resistant PVC-Coated Steel



				4	4"	—	———	0	26	1889K211	00000


				5	5"	—	———	0	26	1889K212	000000
				6	6"	—	———	0	26	1889K213	000000
				7	7"	—	———	0	26	1889K214	000000
				8	8"	—	———	0	26	1889K215	000000
				9	9"	—	———	0	26	1889K216	000000
				10	10"	—	———	0	26	1889K217	000000
				12	12"	—	———	0	26	1889K219	000000


				Corrosion-Resistant 304 Stainless Steel



						3	3"	24	2561K208	00000	24	2561K209	000000


						4	4"	24	2561K11	00000	24	2561K41	000000
						5	5"	24	2561K212	00000	24	2561K213	000000
						6	6"	24	2561K12	00000	24	2561K42	000000
						7	7"	24	2561K215	00000	24	2561K216	000000
						8	8"	24	2561K13	000000	24	2561K43	000000
						10	10"	24	2561K14	000000	24	2561K44	000000
						12	12"	24	2561K218	000000	24	2561K219	000000
						14	14"	—	———	0	24	2561K221	000000
						16	16"	24	2561K223	000000	24	2561K224	000000
						18	18"	24	2561K226	000000	24	2561K227	000000


						20	20"	—	———	0	24	2561K228	000000

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			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Ga.		Each	Ga.		Each	Ga.		Each
3	2 7/8"	24	5078K23	000000	—	———	0	20	2561K151	0000000
4	3 7/8"	24	5078K24	00000	24	1889K351	000000	20	2561K15	000000
5	4 7/8"	24	5078K26	00000	24	1889K352	000000	20	2561K155	000000
6	5 7/8"	24	5078K27	00000	24	1889K353	000000	20	2561K16	000000
7	6 7/8"	24	5078K301	00000	24	1889K354	000000	20	2561K153	000000
8	7 7/8"	24	5078K29	00000	24	1889K355	000000	20	2561K17	000000
9	8 7/8"	22	5078K302	00000	24	1889K356	000000	24	2561K157	000000
10	9 7/8"	24	5078K31	00000	24	1889K357	000000	20	2561K18	000000
12	11 7/8"	24	5078K32	000000	24	1889K359	000000	24	2561K162	000000
14	13 7/8"	24	5078K87	000000	—	———	0	24	2561K164	000000
16	15 7/8"	24	5078K89	000000	—	———	0	24	2561K166	000000
18	17 7/8"	24	5078K303	000000	—	———	0	24	2561K159	000000
20	19 7/8"	24	5078K304	000000	—	———	0	—	———	0
22	21 7/8"	22	5078K305	000000	—	———	0	—	———	0
24	23 7/8"	22	5078K306	000000	—	———	0	—	———	0

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			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Ga.		Each	Ga.		Each	Ga.		Each
3	2 7/8"	24	5078K771	000000	—	———	0	20	2561K152	000000
4	3 7/8"	24	5078K772	00000	24	1889K341	000000	20	2561K19	000000
5	4 7/8"	24	5078K773	00000	24	1889K342	00000	20	2561K156	000000
6	5 7/8"	24	5078K774	00000	24	1889K343	00000	20	2561K21	000000
7	6 7/8"	24	5078K307	00000	24	1889K344	00000	20	2561K154	000000
8	7 7/8"	24	5078K776	00000	24	1889K345	00000	20	2561K22	000000
9	8 7/8"	24	5078K308	00000	24	1889K346	000000	24	2561K158	000000
10	9 7/8"	24	5078K778	00000	24	1889K347	000000	20	2561K23	000000
12	11 7/8"	24	5078K779	00000	24	1889K348	000000	24	2561K163	000000
14	13 7/8"	24	5078K781	00000	—	———	0	24	2561K165	000000
16	15 7/8"	24	5078K782	000000	—	———	0	24	2561K167	000000
18	17 7/8"	24	5078K309	000000	—	———	0	24	2561K161	000000
20	19 7/8"	24	5078K311	000000	—	———	0	—	———	0
22	21 7/8"	24	5078K312	000000	—	———	0	—	———	0
24	23 7/8"	24	5078K313	000000	—	———	0	—	———	0

Straight Connectors

Join two lengths of duct.

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

				Galvanized Steel			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
	Duct Size	ID	OD	Ga.		Each	Ga.		Each	Ga.		Each
Male



		3	—	2 7/8"	24	5078K44	000000	—	———	0	24	2561K101	000000


		4	—	3 7/8"	24	5078K45	00000	26	1889K311	000000	24	2561K33	00000
		5	—	4 7/8"	24	5078K47	00000	26	1889K312	00000	24	2561K102	00000
		6	—	5 7/8"	24	5078K48	00000	26	1889K313	00000	24	2561K34	00000
		7	—	6 7/8"	24	5078K314	00000	26	1889K314	00000	24	2561K103	00000
		8	—	7 7/8"	24	5078K51	00000	26	1889K315	00000	24	2561K35	00000
		9	—	8 7/8"	24	5078K315	00000	26	1889K316	00000	24	2561K104	00000
		10	—	9 7/8"	24	5078K53	00000	26	1889K317	00000	24	2561K36	00000
		12	—	11 7/8"	24	5078K54	00000	26	1889K319	00000	24	2561K105	00000
		14	—	13 7/8"	22	5078K83	00000	—	———	0	22	2561K106	00000
		16	—	15 7/8"	22	5078K84	00000	—	———	0	22	2561K107	00000


		18	—	17 7/8"	22	5078K316	00000	—	———	0	22	2561K108	00000
		20	—	19 7/8"	22	5078K317	00000	—	———	0	22	2561K109	00000
		22	—	21 7/8"	22	5078K318	00000	—	———	0	—	———	0
		24	—	23 7/8"	22	5078K319	00000	—	———	0	—	———	0


		Female



				3	3"	—	24	5078K223	0000	—	———	0	24	2561K111	00000


				4	4"	—	24	5078K224	0000	—	———	0	24	2561K112	00000
				5	5"	—	24	5078K225	0000	—	———	0	24	2561K113	00000
				6	6"	—	24	5078K226	0000	—	———	0	24	2561K114	00000
				7	7"	—	24	5078K321	00000	—	———	0	24	2561K115	00000
				8	8"	—	24	5078K227	0000	—	———	0	24	2561K116	00000
				9	9"	—	24	5078K322	00000	—	———	0	24	2561K117	00000
				10	10"	—	24	5078K228	00000	—	———	0	24	2561K118	00000
				12	12"	—	24	5078K229	00000	—	———	0	24	2561K119	00000
				14	14"	—	22	5078K231	00000	—	———	0	22	2561K121	00000
				16	16"	—	22	5078K232	00000	—	———	0	22	2561K122	00000


				18	18"	—	22	5078K323	00000	—	———	0	22	2561K123	00000
				20	20"	—	22	5078K324	00000	—	———	0	22	2561K124	00000
				22	22"	—	22	5078K325	00000	—	———	0	—	———	0
				24	24"	—	22	5078K326	00000	—	———	0	—	———	0

Tee Connectors

Split or merge airflow paths.

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

		Galvanized Steel			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Ga.		Each	Ga.		Each	Ga.		Each
3	2 7/8"	24	5078K881	000000	—	———	0	24	2561K168	0000000
4	3 7/8"	24	5078K882	00000	24	1889K321	000000	24	2561K169	000000
5	4 7/8"	24	5078K883	00000	—	———	0	24	2561K171	000000
6	5 7/8"	24	5078K884	00000	24	1889K324	00000	24	2561K172	000000
7	6 7/8"	24	5078K327	00000	—	———	0	24	2561K173	000000
8	7 7/8"	24	5078K886	00000	24	1889K326	000000	24	2561K174	000000
9	8 7/8"	24	5078K328	00000	—	———	0	24	2561K175	000000
10	9 7/8"	24	5078K162	00000	24	1889K328	000000	24	2561K176	000000
12	11 7/8"	24	5078K889	000000	24	1889K302	000000	24	2561K177	000000
14	13 7/8"	24	5078K891	000000	—	———	0	24	2561K178	000000
16	15 7/8"	24	5078K892	000000	—	———	0	24	2561K179	000000
18	17 7/8"	24	5078K329	000000	—	———	0	24	2561K181	000000
20	19 7/8"	24	5078K331	000000	—	———	0	24	2561K182	000000
22	21 7/8"	22	5078K332	000000	—	———	0	—	———	0
24	23 7/8"	22	5078K333	000000	—	———	0	—	———	0

45° Wye Connectors

Split or merge airflow more gradually than tees. With less abrupt changes in direction, wyes reduce turbulence for smoother flow.

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

		Galvanized Steel			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Ga.		Each	Ga.		Each	Ga.		Each
3	2 7/8"	24	5078K931	0000000	—	———	0	24	2561K183	0000000
4	3 7/8"	24	5078K932	000000	—	———	0	24	2561K184	000000
5	4 7/8"	24	5078K933	000000	—	———	0	24	2561K185	000000
6	5 7/8"	24	5078K934	00000	24	1889K362	0000000	24	2561K186	000000
7	6 7/8"	24	5078K338	00000	—	———	0	24	2561K187	000000
8	7 7/8"	24	5078K936	00000	24	1889K364	000000	24	2561K188	000000
9	8 7/8"	24	5078K339	000000	—	———	0	24	2561K189	000000
10	9 7/8"	24	5078K938	000000	24	1889K366	000000	24	2561K191	000000
12	11 7/8"	24	5078K939	000000	—	———	0	24	2561K192	000000
14	13 7/8"	24	5078K941	000000	—	———	0	24	2561K193	000000
16	15 7/8"	24	5078K942	000000	—	———	0	24	2561K194	000000
18	17 7/8"	24	5078K341	000000	—	———	0	24	2561K195	000000
20	19 7/8"	24	5078K342	000000	—	———	0	24	2561K196	000000
22	21 7/8"	24	5078K343	000000	—	———	0	—	———	0
24	23 7/8"	24	5078K344	000000	—	———	0	—	———	0

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			Chemical-Resistant PVC-Coated Steel			Corrosion-Resistant 304 Stainless Steel
(A)	(B)	(A)	(B)	Ga.		Each	Ga.		Each	Ga.		Each
4	3	3 7/8"	2 7/8"	24	5078K56	000000	—	———	0	24	2561K125	000000
5	4	4 7/8"	3 7/8"	24	5078K57	00000	20	1889K372	000000	24	2561K126	00000
6	4	5 7/8"	3 7/8"	24	5078K59	00000	20	1889K381	00000	20	2561K28	00000
6	5	5 7/8"	4 7/8"	24	5078K63	00000	20	1889K382	00000	24	2561K127	00000
7	6	6 7/8"	5 7/8"	24	5078K334	00000	20	1889K374	00000	24	2561K128	00000
8	6	7 7/8"	5 7/8"	24	5078K62	00000	20	1889K383	00000	20	2561K29	000000
8	7	7 7/8"	6 7/8"	24	5078K335	00000	20	1889K384	00000	24	2561K129	000000
9	8	8 7/8"	7 7/8"	24	5078K336	00000	20	1889K376	00000	24	2561K131	000000
10	6	9 7/8"	5 7/8"	24	5078K61	00000	—	———	0	20	2561K31	000000
10	8	9 7/8"	7 7/8"	24	5078K65	00000	20	1889K385	000000	20	2561K32	000000
10	9	9 7/8"	8 7/8"	24	5078K337	00000	20	1889K386	000000	—	———	0
12	6	11 7/8"	5 7/8"	24	5078K66	00000	—	———	0	—	———	0
12	8	11 7/8"	7 7/8"	24	5078K68	00000	—	———	0	—	———	0
12	10	11 7/8"	9 7/8"	24	5078K69	00000	20	1889K387	000000	24	2561K132	000000
14	12	13 7/8"	11 7/8"	24	5078K91	00000	—	———	0	24	2561K133	000000
16	14	15 7/8"	13 7/8"	24	5078K92	00000	—	———	0	24	2561K134	000000
18	16	17 7/8"	15 7/8"	22	5078K131	00000	—	———	0	24	2561K135	000000
20	18	19 7/8"	17 7/8"	24	5078K132	000000	—	———	0	24	2561K136	000000
22	20	21 7/8"	19 7/8"	24	5078K133	000000	—	———	0	—	———	0
24	22	23 7/8"	21 7/8"	24	5078K134	000000	—	———	0	—	———	0

Tee Reducers

Connect duct of different diameters to split or merge airflow.

Duct Size			OD			Chemical-Resistant PVC-Coated Steel
(A)	(B)	(C)	(A)	(B)	(C)	Ga.		Each
6	4	6	5 7/8"	3 7/8"	5 7/8"	24	1889K323	000000
8	6	8	7 7/8"	5 7/8"	7 7/8"	24	1889K325	000000
10	8	10	9 7/8"	7 7/8"	9 7/8"	24	1889K327	000000
12	8	12	11 7/8"	7 7/8"	11 7/8"	24	1889K329	000000

45° Wye Reducers

Connect duct of different diameters to split or merge airflow more gradually than tees. With less abrupt changes in direction, wyes reduce turbulence for smoother flow.

Duct Size			OD			Chemical-Resistant PVC-Coated Steel
(A)	(B)	(C)	(A)	(B)	(C)	Ga.		Each
6	4	6	5 7/8"	3 7/8"	5 7/8"	24	1889K361	000000
8	6	8	7 7/8"	5 7/8"	7 7/8"	24	1889K363	000000
10	8	10	9 7/8"	7 7/8"	9 7/8"	24	1889K365	000000
12	10	12	11 7/8"	9 7/8"	11 7/8"	24	1889K367	000000

Straight Collars

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

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

			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Bottom Gasket Material	Ga.		Each
4	3 7/8"	Polyethylene Foam	24	2561K137	000000
5	4 7/8"	Polyethylene Foam	24	2561K138	00000
6	5 7/8"	Polyethylene Foam	24	2561K139	00000
7	6 7/8"	Polyethylene Foam	24	2561K141	00000
8	7 7/8"	Polyethylene Foam	24	2561K142	00000
9	8 7/8"	Polyethylene Foam	24	2561K143	00000
10	9 7/8"	Polyethylene Foam	24	2561K144	00000
12	11 7/8"	Polyethylene Foam	24	2561K145	00000
14	13 7/8"	Polyethylene Foam	24	2561K146	00000
16	15 7/8"	Polyethylene Foam	24	2561K147	00000
18	17 7/8"	Polyethylene Foam	24	2561K148	00000
20	19 7/8"	Polyethylene Foam	24	2561K149	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			Corrosion-Resistant 304 Stainless Steel
Duct Size	OD	Ga.		Each	Ga.		Each
3	2 7/8"	24	5078K33	000000	24	2561K197	000000
4	3 7/8"	24	5078K35	00000	24	2561K24	00000
5	4 7/8"	24	5078K36	00000	24	2561K198	00000
6	5 7/8"	24	5078K38	00000	24	2561K25	00000
7	6 7/8"	24	5078K358	00000	24	2561K199	00000
8	7 7/8"	24	5078K39	00000	24	2561K26	00000
9	8 7/8"	24	5078K359	00000	24	2561K201	00000
10	9 7/8"	24	5078K41	00000	24	2561K27	00000
12	11 7/8"	24	5078K42	00000	24	2561K202	00000
14	13 7/8"	24	5078K85	00000	24	2561K203	000000
16	15 7/8"	24	5078K86	00000	24	2561K204	000000
18	17 7/8"	22	5078K361	00000	24	2561K205	000000
20	19 7/8"	24	5078K362	00000	24	2561K206	000000
22	21 7/8"	24	5078K363	00000	—	———	0
24	23 7/8"	24	5078K364	00000	—	———	0

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
5	4 7/8"	9 1/4"	23 5/8"	50%	24	2775K2	000000
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

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

Straight Collars

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 EPDM Gasket
Duct Size	OD	Bottom Gasket Material	Ga.		Each
4	3 7/8"	Polyethylene Foam	24	5078K11	000000
5	4 7/8"	Polyethylene Foam	24	5078K12	00000
6	5 7/8"	Polyethylene Foam	24	5078K111	00000
7	6 7/8"	Polyethylene Foam	24	5078K345	00000
8	7 7/8"	Polyethylene Foam	24	5078K112	00000
9	8 7/8"	Polyethylene Foam	24	5078K346	00000
10	9 7/8"	Polyethylene Foam	24	5078K113	00000
12	11 7/8"	Polyethylene Foam	24	5078K114	00000
14	13 7/8"	Polyethylene Foam	24	5078K115	00000
16	15 7/8"	Polyethylene Foam	24	5078K116	00000
18	17 7/8"	Polyethylene Foam	24	5078K347	00000
20	19 7/8"	Polyethylene Foam	24	5078K348	00000
22	21 7/8"	Polyethylene Foam	24	5078K349	00000
24	23 7/8"	Polyethylene Foam	24	5078K351	00000

Straight Collars with Airflow Damper

Add a branch of round duct from rectangular systems and control airflow with the damper. Cut a hole, install the collar, and connect a piece of tight-seal spiral 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 EPDM Gasket
Duct Size	OD	Bottom Gasket Material	Ga.		Each
4	3 7/8"	Polyethylene Foam	24	5078K135	000000
5	4 7/8"	Polyethylene Foam	24	5078K136	00000
6	5 7/8"	Polyethylene Foam	24	5078K121	00000
7	6 7/8"	Polyethylene Foam	24	5078K352	00000
8	7 7/8"	Polyethylene Foam	24	5078K122	00000
9	8 7/8"	Polyethylene Foam	24	5078K353	00000
10	9 7/8"	Polyethylene Foam	24	5078K123	00000
12	11 7/8"	Polyethylene Foam	24	5078K124	00000
14	13 7/8"	Polyethylene Foam	24	5078K125	00000
16	15 7/8"	Polyethylene Foam	24	5078K126	00000
18	17 7/8"	Polyethylene Foam	24	5078K354	00000
20	19 7/8"	Polyethylene Foam	24	5078K355	00000
22	21 7/8"	Polyethylene Foam	24	5078K356	000000
24	23 7/8"	Polyethylene Foam	24	5078K357	000000

End Caps

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

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.

Duct

Closed Duct

Pair with compatible fittings and accessories.

Closed Duct—With a closed seam, this duct is stronger and less prone to air leaks than open duct. However, it’s not as quick to modify when installing.

					2 ft. Long		5 ft. Long
	Duct Size	ID	OD	Ga.		Each		Each
Corrosion-Resistant 304 Stainless Steel







				Closed Duct

				4	4"	3 7/8"	24	18005K29	000000	18005K101	0000000


				5	5"	4 7/8"	24	18005K31	00000	18005K102	000000
				6	6"	5 7/8"	24	18005K32	00000	18005K24	000000
				7	7"	6 7/8"	24	18005K33	000000	18005K25	000000
				8	8"	7 7/8"	24	18005K34	000000	18005K26	000000
				10	10"	9 7/8"	24	18005K35	000000	18005K27	000000
				12	12"	11 7/8"	24	18005K36	000000	18005K28	000000

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		Corrosion-Resistant 304 Stainless Steel
Duct Size	ID	OD	Seam Construction	Ga.		Each		Each



	3	3"	2 7/8"	Welded	20	———	0	1768K152	0000000


	4	4"	3 7/8"	Welded	20	1768K89	0000000	17805K73	000000
	5	5"	4 7/8"	Welded	20	1768K91	000000	17805K74	000000
	6	6"	5 7/8"	Welded	20	1768K92	000000	17805K75	000000
	7	7"	6 7/8"	Welded	20	1768K93	000000	17805K76	000000
	8	8"	7 7/8"	Welded	20	1768K94	000000	17805K77	000000
	10	10"	9 7/8"	Welded	20	1768K95	000000	17805K78	000000
	12	12"	11 7/8"	Welded	20	1768K96	000000	17805K79	000000

45° Elbow Connectors

Welded Seam

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		Corrosion-Resistant 304 Stainless Steel
Duct Size	ID	OD	Seam Construction	Ga.		Each		Each



	3	3"	2 7/8"	Welded	20	———	0	1768K154	0000000


	4	4"	3 7/8"	Welded	20	1768K72	0000000	17805K53	000000
	5	5"	4 7/8"	Welded	20	1768K73	000000	17805K54	000000
	6	6"	5 7/8"	Welded	20	1768K74	000000	17805K55	000000
	7	7"	6 7/8"	Welded	20	1768K75	000000	17805K56	000000
	8	8"	7 7/8"	Welded	20	1768K76	000000	17805K57	000000
	10	10"	9 7/8"	Welded	20	1768K77	000000	17805K58	000000
	12	12"	11 7/8"	Welded	20	1768K78	000000	17805K59	000000

Duct Damper Handles

Pair with your own blade to create an economical damper for existing duct.

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

	Galvanized Steel
For Max. Damper Blade Thk.		Each
0.022"	1786K21	00000

Duct Blast Gates

Open and close the slide to control airflow to sections of duct. Blast gates turn flow on or off.

Aluminum with 304 Stainless Steel Slide—These blast gates have a 304 stainless steel slide that holds up to moisture and mild chemicals better than galvanized steel. The aluminum body reduces stress on your duct.

			Overall
	Duct Size	OD	Wd.	Ht.	Dp.	Features		Each
Aluminum with 304 Stainless Steel Slide



		4	3 7/8"	5"	9 1/8"	1 7/8"	Locking Screw	1822K313	000000


		5	4 3/4"	6"	11 3/4"	2 1/8"	Locking Screw	1822K314	00000
		6	5 13/16"	7"	14 3/8"	2 1/8"	Locking Screw	1822K315	00000
		7	6 13/16"	8"	15 5/8"	2 1/2"	Locking Screw	1822K316	00000
		8	7 7/8"	9 5/8"	18 1/8"	3 1/2"	Locking Screw	1822K317	00000
		10	9 13/16"	11 3/8"	22 1/8"	3 3/4"	Locking Screw	1822K319	000000
		12	11 13/16"	13 1/4"	26 3/4"	3 5/8"	Locking Screw	1822K322	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—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.

Connectors—You'll need these to join floor sweeps with spiral or tight-seal spiral duct.

Duct Floor Sweeps								Galvanized Steel Connectors for Spiral Duct		Galvanized Steel Connectors for Tight-Seal Spiral Duct
		Overall				Galvanized Steel
Duct Size	ID	Wd.	Ht.	Dp.	Ga.		Each		Each		Each
6	6"	11 1/8"	18 1/4"	6"	18	17345K11	0000000	5078K48	000000	2226K27	000000