About Duct Connections
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Standard Duct and Fittings
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.
For technical drawings and 3-D models, click on a part number.
Connectors with welded seams prevent leaks.
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Features | End Construction | Gauge | Each | |
| 3 | 3" | 2 7/8" | Welded Seams | Tapered | 20 | 0000000 | 0000000 |
| 4 | 4" | 3 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 5 | 5" | 4 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 6 | 6" | 5 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 7 | 7" | 6 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 8 | 8" | 7 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 10 | 10" | 9 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 12 | 12" | 11 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 14 | 14" | 13 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 16 | 16" | 15 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 18 | 18" | 17 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 20 | 20" | 19 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 22 | 22" | 21 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 24 | 24" | 23 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
Connectors with welded seams prevent leaks.
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Features | End Construction | Gauge | Each | |
| 3 | 3" | 2 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 4 | 4" | 3 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 5 | 5" | 4 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 6 | 6" | 5 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 7 | 7" | 6 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 8 | 8" | 7 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 10 | 10" | 9 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 12 | 12" | 11 7/8" | Welded Seams | Tapered | 20 | 0000000 | 000000 |
| 14 | 14" | 13 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 16 | 16" | 15 7/8" | Welded Seams | Tapered | 20 | 00000000 | 000000 |
| 18 | 18" | 17 7/8" | __ | Crimped | 24 | 00000000 | 000000 |
| 20 | 20" | 19 7/8" | __ | Crimped | 24 | 00000000 | 000000 |
| 22 | 22" | 21 7/8" | __ | Crimped | 24 | 00000000 | 000000 |
| 24 | 24" | 23 7/8" | __ | Crimped | 24 | 00000000 | 000000 |
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 3 | 3" | 2 7/8" | 26 | Crimped | 0000000 | 000000 |
| 4 | 4" | 3 7/8" | 26 | Crimped | 0000000 | 00000 |
| 5 | 5" | 4 7/8" | 26 | Crimped | 0000000 | 00000 |
| 6 | 6" | 5 7/8" | 26 | Crimped | 0000000 | 00000 |
| 7 | 7" | 6 7/8" | 26 | Crimped | 0000000 | 00000 |
| 8 | 8" | 7 7/8" | 26 | Crimped | 0000000 | 00000 |
| 9 | 9" | 8 7/8" | 26 | Crimped | 0000000 | 00000 |
| 10 | 10" | 9 7/8" | 26 | Crimped | 0000000 | 00000 |
| 12 | 12" | 11 7/8" | 26 | Crimped | 0000000 | 00000 |
| 14 | 14" | 13 7/8" | 24 | Crimped | 0000000 | 00000 |
| 16 | 16" | 15 7/8" | 24 | Crimped | 0000000 | 000000 |
| 18 | 18" | 17 7/8" | 24 | Crimped | 0000000 | 000000 |
| 20 | 20" | 19 7/8" | 24 | Crimped | 0000000 | 000000 |
| 24 | 24" | 23 7/8" | 24 | Crimped | 0000000 | 000000 |
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 3 | 3" | 2 7/8" | 26 | Crimped | 00000000 | 000000 |
| 4 | 4" | 3 7/8" | 26 | Crimped | 00000000 | 00000 |
| 5 | 5" | 4 7/8" | 26 | Crimped | 00000000 | 00000 |
| 6 | 6" | 5 7/8" | 26 | Crimped | 00000000 | 00000 |
| 7 | 7" | 6 7/8" | 26 | Crimped | 00000000 | 00000 |
| 8 | 8" | 7 7/8" | 26 | Crimped | 00000000 | 00000 |
| 9 | 9" | 8 7/8" | 26 | Crimped | 00000000 | 00000 |
| 10 | 10" | 9 7/8" | 26 | Crimped | 00000000 | 00000 |
| 12 | 12" | 11 7/8" | 26 | Crimped | 00000000 | 00000 |
| 14 | 14" | 13 7/8" | 24 | Crimped | 00000000 | 00000 |
| 16 | 16" | 15 7/8" | 24 | Crimped | 00000000 | 00000 |
Crush-Resistant Spiral Duct and Fittings
A spiral seam makes this duct strong and rigid. Fittings have male ends with a slightly smaller diameter to press-fit into duct.
Galvanized steel has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Each | |
| 3 | 2 7/8" | 24 | Spiral | 0000000 | 000000 |
| 4 | 3 7/8" | 24 | Spiral | 0000000 | 00000 |
| 5 | 4 7/8" | 24 | Spiral | 0000000 | 00000 |
| 6 | 5 7/8" | 24 | Spiral | 0000000 | 00000 |
| 7 | 6 7/8" | 24 | Spiral | 00000000 | 00000 |
| 8 | 7 7/8" | 24 | Spiral | 0000000 | 00000 |
| 9 | 8 7/8" | 22 | Spiral | 00000000 | 00000 |
| 10 | 9 7/8" | 24 | Spiral | 0000000 | 00000 |
| 12 | 11 7/8" | 24 | Spiral | 0000000 | 000000 |
| 14 | 13 7/8" | 24 | Spiral | 0000000 | 000000 |
| 16 | 15 7/8" | 24 | Spiral | 0000000 | 000000 |
| 18 | 17 7/8" | 24 | Spiral | 00000000 | 000000 |
| 20 | 19 7/8" | 24 | Spiral | 00000000 | 000000 |
| 22 | 21 7/8" | 22 | Spiral | 00000000 | 000000 |
| 24 | 23 7/8" | 22 | Spiral | 00000000 | 000000 |
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Each | |
| 3 | 2 7/8" | 24 | Spiral | 00000000 | 000000 |
| 4 | 3 7/8" | 24 | Spiral | 00000000 | 00000 |
| 5 | 4 7/8" | 24 | Spiral | 00000000 | 00000 |
| 6 | 5 7/8" | 24 | Spiral | 00000000 | 00000 |
| 7 | 6 7/8" | 24 | Spiral | 00000000 | 00000 |
| 8 | 7 7/8" | 24 | Spiral | 00000000 | 00000 |
| 9 | 8 7/8" | 24 | Spiral | 00000000 | 00000 |
| 10 | 9 7/8" | 24 | Spiral | 00000000 | 00000 |
| 12 | 11 7/8" | 24 | Spiral | 00000000 | 00000 |
| 14 | 13 7/8" | 24 | Spiral | 00000000 | 00000 |
| 16 | 15 7/8" | 24 | Spiral | 00000000 | 000000 |
| 18 | 17 7/8" | 24 | Spiral | 00000000 | 000000 |
| 20 | 19 7/8" | 24 | Spiral | 00000000 | 000000 |
| 22 | 21 7/8" | 24 | Spiral | 00000000 | 000000 |
| 24 | 23 7/8" | 24 | Spiral | 00000000 | 000000 |
Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Galvanized Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Style | Gauge | Each | Style | Gauge | Each | ||
| 3 | 2 7/8" | Rolled | A | 24 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 4 | 3 7/8" | Rolled | A | 24 | 0000000 | 00000 | __ | __ | 000000 | 00 |
| 5 | 4 7/8" | Rolled | A | 24 | 0000000 | 00000 | __ | __ | 000000 | 00 |
| 6 | 5 7/8" | Rolled | A | 24 | 0000000 | 000000 | __ | __ | 000000 | 00 |
| 7 | 6 7/8" | Rolled | A | 24 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 8 | 7 7/8" | Rolled | B | 14 | 00000000 | 000000 | B | 22 | 00000000 | 0000000 |
| 9 | 8 7/8" | Rolled | B | 14 | 00000000 | 000000 | B | 22 | 00000000 | 000000 |
| 10 | 9 7/8" | Rolled | B | 14 | 00000000 | 000000 | B | 22 | 00000000 | 000000 |
| 12 | 12" | Rolled | B | 14 | 00000000 | 000000 | B | 22 | 00000000 | 000000 |
| 14 | 13 15/16" | Rolled | B | 14 | 00000000 | 000000 | B | 20 | 00000000 | 000000 |
| 16 | 16" | Rolled | B | 14 | 00000000 | 000000 | B | 20 | 00000000 | 000000 |
| 18 | 17 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 18 | 17 15/16" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 20 | 19 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 20 | 19 15/16" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 22 | 21 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 22 | 22" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 24 | 23 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 24 | 23 15/16" | Rolled | B | 14 | 00000000 | 00000000 | __ | __ | 000000 | 00 |
Galvanized Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Style | Gauge | Each | Style | Gauge | Each | ||
| 3 | 2 7/8" | Rolled | A | 24 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 4 | 3 7/8" | Rolled | A | 24 | 00000000 | 00000 | __ | __ | 000000 | 00 |
| 5 | 4 7/8" | Rolled | A | 24 | 00000000 | 00000 | __ | __ | 000000 | 00 |
| 6 | 5 7/8" | Rolled | A | 24 | 00000000 | 00000 | __ | __ | 000000 | 00 |
| 7 | 6 7/8" | Rolled | A | 24 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 8 | 7 7/8" | Rolled | B | 22 | 00000000 | 000000 | B | 14 | 00000000 | 0000000 |
| 9 | 8 7/8" | Rolled | B | 22 | 00000000 | 000000 | B | 14 | 00000000 | 000000 |
| 10 | 9 7/8" | Rolled | B | 22 | 00000000 | 000000 | B | 14 | 00000000 | 000000 |
| 12 | 12" | Rolled | B | 22 | 00000000 | 000000 | B | 14 | 00000000 | 000000 |
| 14 | 13 15/16" | Rolled | B | 20 | 00000000 | 000000 | B | 14 | 00000000 | 000000 |
| 16 | 16" | Rolled | B | 20 | 00000000 | 000000 | B | 14 | 00000000 | 000000 |
| 18 | 17 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 18 | 17 15/16" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 20 | 19 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 20 | 19 15/16" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 22 | 21 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 22 | 22" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 24 | 23 7/8" | Rolled | B | 20 | 00000000 | 000000 | __ | __ | 000000 | 00 |
| 24 | 23 15/16" | Rolled | B | 14 | 00000000 | 000000 | __ | __ | 000000 | 00 |
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Style | Gauge | Each | |
| 3 | 3 1/16" | Rolled | A | 24 | 00000000 | 000000 |
| 4 | 3 7/8" | Rolled | A | 24 | 00000000 | 00000 |
| 5 | 4 7/8" | Rolled | A | 24 | 00000000 | 00000 |
| 6 | 5 7/8" | Rolled | A | 24 | 00000000 | 000000 |
| 7 | 6 7/8" | Rolled | A | 24 | 00000000 | 000000 |
| 8 | 7 7/8" | Rolled | B | 22 | 00000000 | 000000 |
| 9 | 8 7/8" | Rolled | B | 22 | 00000000 | 000000 |
| 10 | 9 7/8" | Rolled | B | 22 | 00000000 | 000000 |
| 12 | 12" | Rolled | B | 22 | 00000000 | 000000 |
| 14 | 13 15/16" | Rolled | B | 20 | 00000000 | 000000 |
| 16 | 16" | Rolled | B | 20 | 00000000 | 000000 |
| 18 | 17 15/16" | Rolled | B | 20 | 00000000 | 000000 |
| 20 | 19 15/16" | Rolled | B | 20 | 00000000 | 000000 |
| 22 | 22" | Rolled | B | 20 | 00000000 | 000000 |
| 24 | 23 15/16" | Rolled | B | 20 | 00000000 | 000000 |
Sure-Seal Spiral Duct and Fittings
Fittings have gaskets which create a tight seal—you don't need to seal joints with coating or tape. Fittings have male ends with a slightly smaller diameter to press-fit into duct. These duct and fittings are compatible with Crush-Resistant Spiral Duct and Fittings.
For technical drawings and 3-D models, click on a part number.
Rectangular Duct and Fittings
Often used in tight spaces, such as in walls and ceilings, rectangular duct allows you to select larger sizes without increasing duct height. Duct and fittings have interconnecting ends that lock together with brackets.
For technical drawings and 3-D models, click on a part number.
Oval Duct and Fittings
At about half the height, this oval duct fits in tighter spaces than round and rectangular duct. Duct and fittings press-fit together.
For technical drawings and 3-D models, click on a part number.
Gas Chimney Vents and Fittings
For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.
To join pipes and connectors, insert a male end into a female end and secure with the included locking band.
For technical drawings and 3-D models, click on a part number.
Adjustable-angle elbow connectors can be used at an angle or straight.