Southwark Metal 73C10108 Rectangular to Round Transition 10 Inches X 10 Inches X 8 Inches

Product Description

The Southwark Metal 73C10108 is a rectangular to round transition fitting designed for HVAC duct systems where airflow must shift from a rectangular plenum or trunk line to a round duct collar. This type of fitting is a standard component in residential and light commercial forced-air systems. HVAC installers and sheet metal contractors use it when connecting rectangular supply or return air plenums to round branch ducts or flex duct runs. The 73C10108 has a rectangular opening of 10 inches by 10 inches and transitions to an 8-inch round collar. The overall height of the fitting is 11.5 inches, and the collar height is approximately 2 inches for diameters in the 4-inch to 16-inch range. This fitting is fabricated from hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, which provides corrosion resistance suitable for long-term use inside ductwork installations. The 28-gauge steel construction keeps the fitting lightweight at approximately 2.42 pounds while maintaining structural rigidity during installation and operation. Galvanized fittings like this one are the industry standard for HVAC sheet metal work because they resist rust caused by condensation and humidity inside duct systems. The 73C10108 is sold as a single unit and is made in the USA. Southwark Metal is a well-known manufacturer of sheet metal duct fittings widely used by HVAC professionals across North America. This fitting is compatible with standard round collars and flex duct connectors used in residential and commercial air distribution systems. It fits into the Southwark 73C product family, which covers a range of rectangular to round transitions available from 6 inches by 6 inches through 20 inches by 20 inches. Trade professionals should confirm collar compatibility before installation.

• Rectangular opening of 10 inches by 10 inches transitions to an 8-inch round collar for standard HVAC duct connections
• Constructed from 28-gauge hot-dipped galvanized steel per ASTM A653 CS Type B for long-lasting corrosion resistance
• Manufactured in the USA and sold as a single unit, suitable for residential and light commercial forced-air duct systems

Product Highlights

The Southwark Metal 73C10108 rectangular to round transition delivers reliable, code-compatible duct fitting performance in a galvanized steel construction. It is a go-to fitting for HVAC installers connecting rectangular plenums to round branch duct runs.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C10108

Technical Specifications

• Material: Galvanized Steel
• Gauge: 28 GA
• Duct Size: 10 inches x 10 inches
• Collar Diameter: 8 inches
• Height: 11.5 inches
• Length: 10 inches
• Width: 10 inches
• Weight: 2.42 pounds
• Galvanized Coating: Yes
• Country of Origin: USA
• Unit of Measure: Each
• Prop 65: Yes