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.
Collars create branches from a rectangular duct. Cut a hole in the duct and use a collar to attach standard duct.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | End Construction | Gauge | Each | |
Female | ||||||
| 3 | 3" | __ | Plain | 28 | 0000000 | 00000 |
| 4 | 4" | __ | Plain | 28 | 0000000 | 0000 |
| 5 | 5" | __ | Plain | 28 | 0000000 | 0000 |
| 6 | 6" | __ | Plain | 28 | 0000000 | 0000 |
| 8 | 8" | __ | Plain | 28 | 0000000 | 0000 |
| 10 | 10" | __ | Plain | 28 | 0000000 | 0000 |
| 12 | 12" | __ | Plain | 28 | 0000000 | 00000 |
| 14 | 14" | __ | Plain | 28 | 0000000 | 00000 |
| 16 | 16" | __ | Plain | 28 | 0000000 | 00000 |
| 18 | 18" | __ | Plain | 28 | 0000000 | 00000 |
| 20 | 20" | __ | Plain | 28 | 0000000 | 00000 |
Male | ||||||
| 3 | __ | 2 7/8" | Crimped | 28 | 0000000 | 0000 |
| 4 | __ | 3 7/8" | Crimped | 28 | 0000000 | 0000 |
| 5 | __ | 4 7/8" | Crimped | 28 | 0000000 | 0000 |
| 6 | __ | 5 7/8" | Crimped | 28 | 0000000 | 0000 |
| 8 | __ | 7 7/8" | Crimped | 28 | 0000000 | 0000 |
| 10 | __ | 9 7/8" | Crimped | 28 | 0000000 | 0000 |
| 12 | __ | 11 7/8" | Crimped | 28 | 0000000 | 00000 |
| 14 | __ | 13 7/8" | Crimped | 28 | 0000000 | 00000 |
| 16 | __ | 15 7/8" | Crimped | 28 | 0000000 | 00000 |
| 18 | __ | 17 7/8" | Crimped | 28 | 0000000 | 00000 |
| 20 | __ | 19 7/8" | Crimped | 28 | 0000000 | 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. 304 stainless steel is more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Collars create branches from a rectangular duct. Cut a hole in the duct and use a collar to attach spiral duct.
Galvanized Steel | 304 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | Gasket Material | End Construction | Each | Each | ||
Collar | ||||||||
| 4 | 3 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 000000 |
| 4 | 3 7/8" | 24 | Polyethylene Foam | Plain | 0000000 | 000000 | 000000 | 00 |
| 5 | 4 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 5 | 4 7/8" | 24 | Polyethylene Foam | Plain | 0000000 | 00000 | 000000 | 00 |
| 6 | 5 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 6 | 5 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 7 | 6 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 7 | 6 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 8 | 7 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 8 | 7 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 9 | 8 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 9 | 8 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 10 | 9 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 10 | 9 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 12 | 11 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 12 | 11 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 14 | 13 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 14 | 13 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 16 | 15 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 16 | 15 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 18 | 17 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 18 | 17 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 20 | 19 7/8" | 24 | __ | Plain | 000000 | 00 | 00000000 | 00000 |
| 20 | 19 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 22 | 21 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 24 | 23 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
Collar with Damper | ||||||||
| 4 | 3 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 5 | 4 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 6 | 5 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 7 | 6 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 8 | 7 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 9 | 8 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 10 | 9 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 12 | 11 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 14 | 13 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 16 | 15 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 18 | 17 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 20 | 19 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 00000 | 000000 | 00 |
| 22 | 21 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 000000 | 000000 | 00 |
| 24 | 23 7/8" | 24 | Polyethylene Foam | Plain | 00000000 | 000000 | 000000 | 00 |
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.
