Southwark Metal 73C1738211414 Rectangular to Round Transition 17 3/8 Inches X 21 1/4 Inches X 14 Inches

Product Description

The Southwark Metal 73C1738211414 is a rectangular to round transition fitting designed for use in residential and commercial HVAC duct systems. This fitting connects a rectangular duct opening to a round collar, making it a critical component when transitioning between different duct shapes in forced air systems. HVAC installers and sheet metal contractors rely on this type of fitting when joining rectangular trunk lines to round branch ducts or when connecting air handlers and plenums to round flex or rigid duct runs. The 73C1738211414 has a rectangular inlet measuring 17 3/8 inches by 21 1/4 inches and transitions down to a 14 inch round collar. The overall height of the fitting is 12 inches. This size range is commonly used in larger residential systems and light commercial installations where high airflow capacity is required. The fitting is fabricated from 28 gauge hot dipped galvanized steel meeting ASTM A653 CS Type B standards. Galvanized steel construction provides corrosion resistance and long service life in both supply and return air applications. The collar height on fittings with a diameter of 18 inches and above is approximately 3 inches, providing adequate surface area for securing round duct connections with drive cleats, screws, or mastic sealant. This product is manufactured in the USA and is sold individually. It is part of the Southwark 73C product family, which covers rectangular to round transitions in a broad range of sizes from 6 by 6 inches through 20 by 20 inches. Prop 65 compliance is noted for this product. The 73C1738211414 is a go-to choice for sheet metal mechanics and HVAC technicians who need a reliable, code-appropriate transition fitting for duct fabrication and installation work.

• Rectangular to round transition fitting with 17 3/8 inches by 21 1/4 inches rectangular inlet and 14 inch round collar
• Fabricated from 28 gauge hot dipped galvanized steel per ASTM A653 CS Type B for durability and corrosion resistance
• Made in the USA and suitable for a wide range of residential and light commercial HVAC duct applications

Product Highlights

The Southwark Metal 73C1738211414 delivers a dependable rectangular to round duct transition built to industry material standards. Its galvanized steel construction and precise sizing make it a practical choice for professional HVAC installation and duct fabrication work.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C1738211414

Technical Specifications

• Product Family: 73C
• Material: Galvanized Steel
• Gauge: 28 GA
• Rectangular Duct Size: 17 3/8 inches x 21 1/4 inches
• Round Collar Diameter: 14 inches
• Height: 12 inches
• Length: 21.25 inches
• Width: 17.375 inches
• Weight: 3.88 pounds
• Galvanized Coating: Yes
• Country of Origin: USA
• Unit of Measure: Each
• Prop 65: Yes