About Duct Connections
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Duct Flanges
Bolt flanges to equipment to start a run of duct. They can also create secure connections between two duct ends by mounting a flange to each end and then joining the flanges.
Steel, galvanized steel, 304 stainless steel, and aluminum flanges are also known as angle rings.
304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Steel, 304 Stainless
Steel, and Aluminum
Flange | Mounting | 304 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Fasteners Included | No. of Holes | Hole Dia. | Connection Type | Each | |
| 3 | 3 1/16" | 7/8" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 000000 |
| 3 1/2 | 3 9/16" | 1" | 1" | 9/64" | No | 6 | 9/32" | Press Fit | 00000000 | 00000 |
| 4 | 4 1/16" | 1" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 00000 |
| 4 1/2 | 4 9/16" | 1" | 1" | 9/64" | No | 6 | 9/32" | Press Fit | 00000000 | 00000 |
| 5 | 5 1/16" | 1" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 00000 |
| 5 1/2 | 5 9/16" | 1" | 1" | 9/64" | No | 6 | 9/32" | Press Fit | 00000000 | 00000 |
| 6 | 6 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 7 | 7 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 8 | 8 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 10 | 10 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 11 | 11 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
| 12 | 12 1/8" | 1 1/2" | 1 1/2" | 1/8" | No | 8 | 7/16" | Press Fit | 0000000 | 00000 |
| 13 | 13 1/8" | 1 1/2" | 1 1/2" | 1/8" | No | 8 | 7/16" | Press Fit | 0000000 | 00000 |
| 14 | 14 1/8" | 1 1/2" | 1 1/2" | 1/8" | No | 8 | 7/16" | Press Fit | 0000000 | 00000 |
| 15 | 15 1/8" | 1 1/2" | 1 1/2" | 1/8" | No | 8 | 7/16" | Press Fit | 0000000 | 00000 |
| 16 | 16 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 8 | 7/16" | Press Fit | 0000000 | 000000 |
| 18 | 18 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 8 | 7/16" | Press Fit | 0000000 | 000000 |
| 19 | 19 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 00000000 | 000000 |
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 000000 |
| 22 | 22 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 000000 |
| 24 | 24 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 000000 |
| 26 | 26 1/8" | 2" | 2" | 3/16" | No | 16 | 7/16" | Press Fit | 0000000 | 000000 |
| 28 | 28 1/8" | 2" | 2" | 3/16" | No | 16 | 7/16" | Press Fit | 0000000 | 000000 |
| 30 | 30 1/8" | 2" | 2" | 3/16" | No | 16 | 7/16" | Press Fit | 0000000 | 000000 |
| 32 | 32 1/8" | 2" | 2" | 3/16" | No | 16 | 7/16" | Press Fit | 00000000 | 000000 |
| 36 | 36 1/8" | 2" | 2" | 3/16" | No | 16 | 7/16" | Press Fit | 00000000 | 000000 |
| 38 | 38 1/8" | 2" | 2" | 3/16" | No | 24 | 7/16" | Press Fit | 00000000 | 000000 |
| 40 | 40 1/8" | 2" | 2" | 3/16" | No | 24 | 7/16" | Press Fit | 00000000 | 000000 |
Weld-On Duct Flanges
Weld flanges to equipment to start a run of duct. They can also create secure connections between two duct ends by mounting a flange to each end and then joining the flanges. Also known as angle rings.
304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Flange | 304 Stainless Steel | ||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Connection Type | Each | |
| 4 | 4 1/16" | 1" | 1" | 1/8" | Press Fit | 0000000 | 000000 |
| 5 | 5 1/16" | 1" | 1" | 1/8" | Press Fit | 0000000 | 00000 |
| 6 | 6 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 7 | 7 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 8 | 8 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 10 | 10 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 11 | 11 1/8" | 1 1/4" | 1 1/4" | 1/8" | Press Fit | 0000000 | 00000 |
| 12 | 12 1/8" | 1 1/2" | 1 1/2" | 1/8" | Press Fit | 0000000 | 00000 |
| 13 | 13 1/8" | 1 1/2" | 1 1/2" | 1/8" | Press Fit | 0000000 | 00000 |
| 14 | 14 1/8" | 1 1/2" | 1 1/2" | 1/8" | Press Fit | 0000000 | 00000 |
| 15 | 15 1/8" | 1 1/2" | 1 1/2" | 1/8" | Press Fit | 0000000 | 00000 |
| 16 | 16 1/8" | 1 1/2" | 1 1/2" | 3/16" | Press Fit | 0000000 | 000000 |
| 18 | 18 1/8" | 1 1/2" | 1 1/2" | 3/16" | Press Fit | 0000000 | 000000 |
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | Press Fit | 0000000 | 000000 |
| 22 | 22 1/8" | 1 1/2" | 1 1/2" | 3/16" | Press Fit | 0000000 | 000000 |
| 24 | 24 1/8" | 1 1/2" | 1 1/2" | 3/16" | Press Fit | 0000000 | 000000 |
| 26 | 26 1/8" | 2" | 2" | 3/16" | Press Fit | 0000000 | 000000 |
| 28 | 28 1/8" | 2" | 2" | 3/16" | Press Fit | 0000000 | 000000 |
| 30 | 30 1/8" | 2" | 2" | 3/16" | Press Fit | 0000000 | 000000 |
Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
304 stainless steel is the most corrosion resistant.
For technical drawings and 3-D models, click on a part number.
Adapters join quick-disconnect duct to other duct systems. Duct-to-duct with flange adapters provide a secure connection between duct. Duct flanges are also available.
304 Stainless Steel | |||||
|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Each | |
Duct-to-Duct with Flange | |||||
| 3 | 3 1/16" | 22 | Rolled | 00000000 | 0000000 |
| 4 | 3 7/8" | 22 | Rolled | 00000000 | 000000 |
| 5 | 4 7/8" | 22 | Rolled | 00000000 | 000000 |
| 6 | 5 7/8" | 22 | Rolled | 00000000 | 000000 |
| 7 | 6 7/8" | 22 | Rolled | 00000000 | 000000 |
| 8 | 7 7/8" | 22 | Rolled | 00000000 | 000000 |
| 9 | 8 7/8" | 22 | Rolled | 00000000 | 000000 |
| 10 | 9 7/8" | 22 | Rolled | 00000000 | 000000 |
| 12 | 12" | 22 | Rolled | 00000000 | 000000 |
| 14 | 13 15/16" | 20 | Rolled | 00000000 | 000000 |
| 16 | 15 15/16" | 20 | Rolled | 00000000 | 000000 |
| 18 | 17 15/16" | 20 | Rolled | 00000000 | 000000 |
| 20 | 19 15/16" | 20 | Rolled | 00000000 | 000000 |