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DFARS Specialty Metals
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.
Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
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.
Galvanized Steel | Corrosion-Resistant 304 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Seam Construction | Ga. | Each | Each | ||||
| 3 | 3" | 2 7/8" | Welded | 20 | 0000000 | 0000000 | 00000000 | 0000000 | ||
| 4 | 4" | 3 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 5 | 5" | 4 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 6 | 6" | 5 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 7 | 7" | 6 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 8 | 8" | 7 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 10 | 10" | 9 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 12 | 12" | 11 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
45° Elbow Connectors
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Welded Seam |
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Riveted 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.
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.
Galvanized Steel | Corrosion-Resistant 304 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Seam Construction | Ga. | Each | Each | ||||
| 3 | 3" | 2 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 0000000 | ||
| 4 | 4" | 3 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 5 | 5" | 4 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 6 | 6" | 5 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 7 | 7" | 6 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 8 | 8" | 7 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 10 | 10" | 9 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 12 | 12" | 11 7/8" | Welded | 20 | 0000000 | 000000 | 00000000 | 000000 | ||
| 18 | 18" | 17 7/8" | Riveted | 24 | 00000000 | 000000 | ——— | 0 | ||
| 20 | 20" | 19 7/8" | Riveted | 24 | 00000000 | 000000 | ——— | 0 | ||
| 22 | 22" | 21 7/8" | Riveted | 24 | 00000000 | 000000 | ——— | 0 | ||
| 24 | 24" | 23 7/8" | Riveted | 24 | 00000000 | 000000 | ——— | 0 | ||
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.
Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
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.
Lightweight Aluminum—One-third the weight of steel, aluminum ductwork is easier to handle during installation. Like galvanized steel, it resists rust in wet environments but won’t last as long.
Galvanized Steel | Corrosion-Resistant 304 Stainless Steel | Lightweight Aluminum | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Ga. | Each | Each | Each | |||||
| 3 | 3" | 2 7/8" | 26 | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 00000 | ||
| 4 | 4" | 3 7/8" | 26 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 | ||
| 5 | 5" | 4 7/8" | 26 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | ||
| 6 | 6" | 5 7/8" | 26 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | ||
| 7 | 7" | 6 7/8" | 26 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | ||
| 8 | 8" | 7 7/8" | 26 | 0000000 | 00000 | 0000000 | 000000 | 0000000 | 00000 | ||
| 9 | 9" | 8 7/8" | 26 | 0000000 | 00000 | ——— | 0 | ——— | 0 | ||
| 10 | 10" | 9 7/8" | 26 | 0000000 | 00000 | 0000000 | 000000 | 0000000 | 00000 | ||
| 12 | 12" | 11 7/8" | 26 | 0000000 | 00000 | 0000000 | 000000 | 0000000 | 00000 | ||
| 14 | 14" | 13 7/8" | 24 | 0000000 | 00000 | ——— | 0 | ——— | 0 | ||
| 16 | 16" | 15 7/8" | 24 | 0000000 | 000000 | ——— | 0 | ——— | 0 | ||
| 18 | 18" | 17 7/8" | 24 | 0000000 | 000000 | ——— | 0 | ——— | 0 | ||
| 20 | 20" | 19 7/8" | 24 | 0000000 | 000000 | ——— | 0 | ——— | 0 | ||
| 24 | 24" | 23 7/8" | 24 | 0000000 | 000000 | ——— | 0 | ——— | 0 | ||
Adjustable-Angle-Elbow Connectors (Adjusts from Straight to 45°)
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Use these connectors as an angled or straight link between pieces of duct. Adjust the shape by twisting the segments.
Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
Duct Size | ID | OD | Ga. | Each | |||
| 3 | 3" | 2 7/8" | 26 | 00000000 | 000000 | ||
| 4 | 4" | 3 7/8" | 26 | 00000000 | 00000 | ||
| 5 | 5" | 4 7/8" | 26 | 00000000 | 00000 | ||
| 6 | 6" | 5 7/8" | 26 | 00000000 | 00000 | ||
| 7 | 7" | 6 7/8" | 26 | 00000000 | 00000 | ||
| 8 | 8" | 7 7/8" | 26 | 00000000 | 00000 | ||
| 9 | 9" | 8 7/8" | 26 | 00000000 | 00000 | ||
| 10 | 10" | 9 7/8" | 26 | 00000000 | 00000 | ||
| 12 | 12" | 11 7/8" | 26 | 00000000 | 00000 | ||
| 14 | 14" | 13 7/8" | 24 | 00000000 | 00000 | ||
| 16 | 16" | 15 7/8" | 24 | 00000000 | 00000 | ||
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.
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.
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 | 0000000 | 000000 | — | ——— | 0 | — | ——— | 0 | |
| 4 | 3 7/8" | 24 | 0000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 0000000 | |
| 5 | 4 7/8" | 24 | 0000000 | 00000 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 6 | 5 7/8" | 24 | 0000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 000000 | |
| 7 | 6 7/8" | — | ——— | 0 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 8 | 7 7/8" | 24 | 0000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 000000 | |
| 9 | 8 7/8" | — | ——— | 0 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 10 | 9 7/8" | 24 | 0000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 000000 | |
| 12 | 11 7/8" | 24 | 0000000 | 000000 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 14 | 13 7/8" | 24 | 0000000 | 000000 | — | ——— | 0 | — | ——— | 0 | |
| 16 | 15 7/8" | 24 | 0000000 | 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.
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.
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 | 00000000 | 000000 | — | ——— | 0 | — | ——— | 0 | |
| 4 | 3 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 0000000 | |
| 5 | 4 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 00000 | — | ——— | 0 | |
| 6 | 5 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 00000 | 20 | 0000000 | 000000 | |
| 7 | 6 7/8" | — | ——— | 0 | 24 | 00000000 | 00000 | — | ——— | 0 | |
| 8 | 7 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 00000 | 20 | 0000000 | 000000 | |
| 9 | 8 7/8" | — | ——— | 0 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 10 | 9 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 000000 | 20 | 0000000 | 000000 | |
| 12 | 11 7/8" | 24 | 00000000 | 00000 | 24 | 00000000 | 000000 | — | ——— | 0 | |
| 14 | 13 7/8" | 24 | 00000000 | 00000 | — | ——— | 0 | — | ——— | 0 | |
| 16 | 15 7/8" | 24 | 00000000 | 000000 | — | ——— | 0 | — | ——— | 0 | |
Tight-Seal Spiral Duct and Fittings
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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.
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.
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.
