{"product_id":"mm-manufacturing-601-8x4x4-register-box-snap-rail-flange","title":"Mm Manufacturing 601-8X4X4 Register Box Snap-rail Flange","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MM MANUFACTURING 601-8X4X4 is a 601 series register box with a snap-rail flange, designed for connecting supply air registers to round duct in residential and light commercial HVAC distribution systems. This box accepts round duct connections and is built to support standard snap-in registers, making it a straightforward component in forced-air duct installations. The 8 x 4 x 4 inch nominal opening size fits common register configurations, and the snap-rail flange design speeds up register installation by eliminating the need for separate fasteners at the face opening.\u003c\/p\u003e\n\u003cp\u003eThis register box is used in floor, wall, and ceiling supply duct terminations where a round duct feeds into a rectangular register opening. It is part of the 601 product line, which is available in nine sizes to accommodate round duct diameters from 4 inches through 9 inches. HVAC installers and sheet metal contractors typically specify these boxes during new construction rough-in or duct replacement work where a clean, secure register termination is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSnap-rail flange design allows fast, tool-free register seating at the face opening\u003c\/li\u003e\n  \u003cli\u003e8 x 4 x 4 inch nominal size fits standard supply register footprints\u003c\/li\u003e\n  \u003cli\u003eCompatible with round duct connections from 4 inches through 9 inches diameter across the 601 series lineup\u003c\/li\u003e\n  \u003cli\u003eLightweight construction at 0.85 pounds for easy handling during overhead or wall installation\u003c\/li\u003e\n  \u003cli\u003ePart of a nine-size product family for consistent specification across multiple duct sizes on a single job\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for connection to round duct from 4 inches through 9 inches in diameter as part of the 601 register box series. Intended for use with standard snap-in supply registers sized to an 8 x 4 inch face opening.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by licensed HVAC technicians or sheet metal contractors as part of a forced-air duct system rough-in or service replacement. The system should be de-energized and the air handler shut down before cutting into existing ductwork or securing the box in place. Seal all duct connections per local mechanical code requirements to prevent conditioned-air loss. Verify register face dimensions match the snap-rail opening before finalizing the installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Register Opening\u003c\/strong\u003e: 8 x 4 x 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 6.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 10.25 inches\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.85 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Type\u003c\/strong\u003e: Snap-Rail\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Connection Type\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MM MANUFACTURING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 601-8X4X4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"M\u0026M MANUFACTURING","offers":[{"title":"Default Title","offer_id":51268088004914,"sku":"601-8X4X4","price":21.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913378.webp?v=1780698776","url":"https:\/\/voomisupply.com\/products\/mm-manufacturing-601-8x4x4-register-box-snap-rail-flange","provider":"Voomi Supply","version":"1.0","type":"link"}