{"product_id":"southwark-metal-73c121212-square-to-round-transition-12-inches-x-12-inches-x-12-inches","title":"Southwark Metal 73C121212 Square to Round Transition 12 Inches X 12 Inches X 12 Inches","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e12 inches x 12 inches square opening transitions to a 12-inch round collar for standard medium-capacity duct connections\u003c\/li\u003e\n\u003cli\u003eConstructed from 28-gauge hot dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and durability\u003c\/li\u003e\n\u003cli\u003eMade 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\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SOUTHWARK METAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 73C121212\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge\u003c\/strong\u003e: 28 GA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct Size\u003c\/strong\u003e: 12 inches x 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanized\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.524 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProp 65\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51121028071730,"sku":"73C121212","price":46.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/304885171.webp?v=1777746368","url":"https:\/\/voomisupply.com\/products\/southwark-metal-73c121212-square-to-round-transition-12-inches-x-12-inches-x-12-inches","provider":"Voomi Supply","version":"1.0","type":"link"}