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DFARS Specialty Metals
Seam Construction
Standard Duct and Fittings
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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.
90° Elbow Connectors
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Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Seam Construction | Ga. | Each | |||
| 3 | 3" | 2 7/8" | Welded | 20 | 00000000 | 0000000 | ||
| 4 | 4" | 3 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 5 | 5" | 4 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 6 | 6" | 5 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 7 | 7" | 6 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 8 | 8" | 7 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 10 | 10" | 9 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 12 | 12" | 11 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 14 | 14" | 13 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 16 | 16" | 15 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 18 | 18" | 17 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 20 | 20" | 19 7/8" | Welded | 20 | 00000000 | 00000000 | ||
45° Elbow Connectors
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Welded Seam |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Seam Construction | Ga. | Each | |||
| 3 | 3" | 2 7/8" | Welded | 20 | 00000000 | 0000000 | ||
| 4 | 4" | 3 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 5 | 5" | 4 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 6 | 6" | 5 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 7 | 7" | 6 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 8 | 8" | 7 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 10 | 10" | 9 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 12 | 12" | 11 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 14 | 14" | 13 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 16 | 16" | 15 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 18 | 18" | 17 7/8" | Welded | 20 | 00000000 | 000000 | ||
| 20 | 20" | 19 7/8" | Welded | 20 | 00000000 | 000000 | ||
Adjustable-Angle-Elbow Connectors (Adjusts from Straight to 90°)
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Use these connectors as an angled or straight link between pieces of duct. Adjust the shape by twisting the segments.
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.
Quick-Disconnect Duct and Fittings
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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.
90° Elbow Connectors
 |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Duct Size | ID | Ga. | Each | |||
| 3 | 3 1/16" | 14 | 00000000 | 0000000 | ||
| 4 | 3 7/8" | 14 | 00000000 | 000000 | ||
| 5 | 4 7/8" | 14 | 00000000 | 000000 | ||
| 6 | 5 7/8" | 14 | 00000000 | 000000 | ||
| 7 | 6 7/8" | 22 | 00000000 | 000000 | ||
| 8 | 7 7/8" | 22 | 00000000 | 000000 | ||
| 9 | 8 7/8" | 22 | 00000000 | 000000 | ||
| 10 | 9 7/8" | 22 | 00000000 | 000000 | ||
| 12 | 12" | 22 | 00000000 | 000000 | ||
| 14 | 13 15/16" | 20 | 00000000 | 000000 | ||
| 16 | 16" | 20 | 00000000 | 000000 | ||
| 18 | 17 15/16" | 20 | 00000000 | 000000 | ||
| 20 | 19 15/16" | 20 | 00000000 | 00000000 | ||
45° Elbow Connectors
 |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Duct Size | ID | Ga. | Each | |||
| 3 | 3 1/16" | 14 | 00000000 | 0000000 | ||
| 4 | 3 7/8" | 14 | 00000000 | 000000 | ||
| 5 | 4 7/8" | 14 | 00000000 | 000000 | ||
| 6 | 5 7/8" | 14 | 00000000 | 000000 | ||
| 7 | 6 7/8" | 22 | 00000000 | 000000 | ||
| 8 | 7 7/8" | 22 | 00000000 | 000000 | ||
| 10 | 9 7/8" | 22 | 00000000 | 000000 | ||
| 12 | 12" | 22 | 00000000 | 000000 | ||
| 14 | 13 15/16" | 20 | 00000000 | 000000 | ||
| 16 | 16" | 20 | 00000000 | 000000 | ||
| 18 | 17 15/16" | 20 | 00000000 | 000000 | ||
| 20 | 19 15/16" | 20 | 00000000 | 000000 | ||
30° Elbow Connectors
 |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Duct Size | ID | Ga. | Each | |||
| 3 | 3 1/16" | 14 | 00000000 | 0000000 | ||
| 4 | 3 7/8" | 14 | 00000000 | 000000 | ||
| 5 | 4 7/8" | 14 | 00000000 | 000000 | ||
| 6 | 5 7/8" | 14 | 00000000 | 000000 | ||
| 8 | 7 7/8" | 22 | 00000000 | 000000 | ||
| 10 | 9 7/8" | 22 | 00000000 | 000000 | ||
| 12 | 12" | 22 | 00000000 | 000000 | ||
| 14 | 13 15/16" | 20 | 00000000 | 000000 | ||
| 16 | 16" | 20 | 00000000 | 000000 | ||
| 18 | 17 15/16" | 20 | 00000000 | 000000 | ||
| 20 | 19 15/16" | 20 | 00000000 | 000000 | ||
Spiral Duct and Fittings
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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.
90° Elbow Connectors
 |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | |||||
|---|---|---|---|---|---|
Duct Size | OD | Ga. | Each | ||
| 3 | 2 7/8" | 20 | 00000000 | 0000000 | |
| 4 | 3 7/8" | 20 | 0000000 | 000000 | |
| 5 | 4 7/8" | 20 | 00000000 | 000000 | |
| 6 | 5 7/8" | 20 | 0000000 | 000000 | |
| 7 | 6 7/8" | 20 | 00000000 | 000000 | |
| 8 | 7 7/8" | 20 | 0000000 | 000000 | |
| 9 | 8 7/8" | 24 | 00000000 | 000000 | |
| 10 | 9 7/8" | 20 | 0000000 | 000000 | |
| 12 | 11 7/8" | 24 | 00000000 | 000000 | |
| 14 | 13 7/8" | 24 | 00000000 | 000000 | |
| 16 | 15 7/8" | 24 | 00000000 | 000000 | |
| 18 | 17 7/8" | 24 | 00000000 | 000000 | |
45° Elbow Connectors
 |
Change the direction of airflow when joining lengths of duct.
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.
Corrosion-Resistant 304 Stainless Steel | |||||
|---|---|---|---|---|---|
Duct Size | OD | Ga. | Each | ||
| 3 | 2 7/8" | 20 | 00000000 | 000000 | |
| 4 | 3 7/8" | 20 | 0000000 | 000000 | |
| 5 | 4 7/8" | 20 | 00000000 | 000000 | |
| 6 | 5 7/8" | 20 | 0000000 | 000000 | |
| 7 | 6 7/8" | 20 | 00000000 | 000000 | |
| 8 | 7 7/8" | 20 | 0000000 | 000000 | |
| 9 | 8 7/8" | 24 | 00000000 | 000000 | |
| 10 | 9 7/8" | 20 | 0000000 | 000000 | |
| 12 | 11 7/8" | 24 | 00000000 | 000000 | |
| 14 | 13 7/8" | 24 | 00000000 | 000000 | |
| 16 | 15 7/8" | 24 | 00000000 | 000000 | |
| 18 | 17 7/8" | 24 | 00000000 | 000000 | |
