Southwark Metal 73C121212 Square to Round Transition 12 Inches X 12 Inches X 12 Inches

Product Description

The Southwark Metal 73C121212 is a square to round transition fitting designed for use in residential and commercial HVAC duct systems. This fitting connects a square or rectangular duct opening to a round collar, allowing airflow to transition smoothly between duct shapes. HVAC installers and sheet metal contractors rely on square to round transitions when connecting main trunk lines to round branch ducts or when fitting ductwork to air handlers, registers, and diffusers. The 73C121212 measures 12 inches in length, 12 inches in width, and 12 inches in height, with a 12-inch round collar diameter and a 12-inch by 12-inch square opening. This makes it a standard size for medium-capacity residential and light commercial applications. The fitting is manufactured from hot dipped galvanized steel meeting ASTM A653 CS Type B standards, which provides corrosion resistance and long service life in both conditioned and unconditioned spaces. At 28 gauge, the metal is sturdy enough for standard forced-air duct systems while remaining easy to cut, seam, and connect with standard sheet metal tools. The galvanized coating protects against rust and moisture, which is especially important in attics, crawl spaces, and mechanical rooms. The collar height on this size is approximately 2 inches, which provides enough depth for a secure slip or drive connection to round flex duct or rigid pipe. This product is sold individually and is made in the USA. It is part of Southwark Metal's 73C product family, which covers square to round transitions in a wide range of sizes. HVAC technicians should verify duct dimensions before ordering to ensure a proper fit.

• 12 inches x 12 inches square opening transitions to a 12-inch round collar for standard medium-capacity duct connections
• Constructed from 28-gauge hot dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and durability
• Made in the USA as part of the Southwark Metal 73C product family, available in sizes 6 inches x 6 inches through 20 inches x 20 inches

Product Highlights

The Southwark Metal 73C121212 delivers a reliable, code-compatible square to round duct transition in a standard 12-inch size, built from galvanized steel for long-lasting performance in forced-air HVAC installations.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C121212

Technical Specifications

• Material: Galvanized Steel
• Gauge: 28 GA
• Height: 12 inches
• Length: 12 inches
• Width: 12 inches
• Diameter: 12 inches
• Duct Size: 12 inches x 12 inches
• Galvanized: Yes
• Country of Origin: USA
• Weight: 2.524 pounds
• Unit of Measure: Each
• Prop 65: Yes