Southwark Metal 73C121210 Rectangular to Round Transition 12 Inches X 12 Inches X 10 Inches

Product Description

The Southwark Metal 73C121210 is a rectangular to round transition fitting designed for HVAC duct systems. It connects a 12 inches x 12 inches rectangular duct opening to a 10 inches round collar. This type of fitting is a standard component in forced air systems, allowing installers to transition between rectangular trunk lines and round branch ducts. HVAC technicians, sheet metal contractors, and mechanical installers rely on this fitting to complete duct layouts efficiently and accurately. The 73C121210 is part of Southwark's 73C product family and is manufactured in the USA. It is built from hot dipped galvanized steel that meets ASTM A653 CS Type B standards, giving it solid corrosion resistance for both residential and light commercial applications. The 28 gauge construction provides a balance of rigidity and workability, making it practical for field installation without requiring heavy-duty tools. The galvanized coating protects the steel from rust and moisture, which is important in areas where condensation or humidity may be present in or around ductwork. The collar height on this unit is approximately 2 inches, which is standard for diameters up to 16 inches. This fitting ships as a single unit and weighs approximately 2.332 pounds, making it easy to handle and position during installation. It fits standard 12 inches x 12 inches duct openings and accepts a 10 inches round collar connection. Southwark Metal fittings are widely used in new construction and retrofit HVAC projects where reliable, code-compliant duct components are required. This product also carries a Prop 65 designation. Whether you are laying out a new forced air system or reworking an existing one, this rectangular to round transition is a dependable choice for connecting duct sections cleanly and securely.

• Connects 12 inches x 12 inches rectangular duct to a 10 inches round collar for smooth airflow transition
• Made from 28 gauge hot dipped galvanized steel meeting ASTM A653 CS Type B for durability and corrosion resistance
• Manufactured in the USA as part of Southwark's 73C product family, sold individually

Product Highlights

The Southwark Metal 73C121210 is a galvanized steel rectangular to round transition that provides a reliable, field-ready connection between 12 inches x 12 inches rectangular duct and a 10 inches round collar in residential and commercial HVAC systems.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C121210

Technical Specifications

• Material: Galvanized Steel
• Gauge: 28 GA
• Duct Size: 12 inches x 12 inches
• Collar Diameter: 10 inches
• Collar Height: Approximately 2 inches
• Weight: 2.332 pounds
• Galvanized Coating: Yes
• Country of Origin: USA
• Unit of Measure: Each
• Prop 65: Yes