Southwark Metal 73C10121616 Rectangular to Round Transition 10.5 Inches X 16 Inches X 16 Inches

Product Description

The Southwark Metal 73C10121616 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, allowing airflow to transition smoothly between duct shapes. HVAC installers and sheet metal contractors rely on this type of fitting when connecting trunk lines to round branch ducts or when interfacing with round flex duct takeoffs. The 73C10121616 features a rectangular opening of 10.5 inches x 16 inches and a round collar diameter of 16 inches. The overall unit height is 12 inches, making it a substantial transition piece suited for higher-volume airflow applications. The fitting is fabricated from hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, ensuring corrosion resistance in both conditioned and unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The sheet metal gauge is 28 GA, which provides a balance of rigidity and workability for field installation. The round collar height is approximately 3 inches on fittings with 18-inch diameter collars and above, which gives enough collar depth for a secure connection to round duct or flex duct with standard clamps and mastic or foil tape. This product is manufactured in the USA and is sold individually. HVAC technicians searching for rectangular to round transitions, duct transitions, galvanized sheet metal fittings, or ASTM A653 ductwork components will find this fitting suitable for new construction and retrofit duct systems. The Southwark Metal 73C product family covers a wide range of sizes, giving contractors flexibility across multiple job types and duct configurations.

• Rectangular to round transition with 10.5 inches x 16 inches rectangular opening and 16 inches round collar diameter
• Fabricated from 28 GA hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and durability
• Made in the USA and sold individually, suitable for residential and commercial HVAC duct installations

Product Highlights

The Southwark Metal 73C10121616 provides a reliable, code-compliant transition between rectangular and round ductwork in HVAC systems. Its galvanized steel construction and ASTM A653 rating make it a dependable choice for long-term performance in a wide range of installation environments.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C10121616

Technical Specifications

• Material: Galvanized Steel
• Gauge: 28 GA
• Duct Size: 10.5 inches x 16 inches
• Collar Diameter: 16 inches
• Height: 12 inches
• Width: 10.5 inches
• Length: 16 inches
• Weight: 2.98 pounds
• Galvanized: Yes
• Country of Origin: USA
• Unit of Measure: Each
• Prop 65: Yes