{"product_id":"southwark-metal-27r484-straight-register-boot-4x8x4-in","title":"Southwark Metal 27r484 Straight Register Boot 4x8x4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOUTHWARK METAL 27r484 is a straight register boot designed to transition from round duct collar to a rectangular floor or wall register opening in residential and light commercial HVAC duct systems. Built from hot-dipped galvanized steel per ASTM A653 CS Type B with a G40 coating, this fitting features a 28-gauge collar and 30-gauge body for a balance of rigidity at the connection point and workable sheet metal on the boot body. The flat back profile simplifies installation against framing or subfloor, and the 1\/4-inch hemmed edge on the register opening adds structural rigidity and a clean finished edge for register grille seating.\u003c\/p\u003e\n\u003cp\u003eThis register boot is used in forced-air heating and cooling duct distribution systems where round branch duct connects to a rectangular floor, wall, or ceiling register. The 4-inch collar accepts standard 4-inch round flex or rigid duct. The 4 x 8-inch register opening accommodates a standard 4 x 8-inch register grille. HVAC installers and sheet metal contractors use this fitting in new construction framing and retrofit duct work where a low-profile straight boot layout is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHot-dipped galvanized steel per ASTM A653 CS Type B G40 for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e28-gauge collar provides a rigid connection point for round duct attachment\u003c\/li\u003e\n  \u003cli\u003e30-gauge body for workable, lightweight construction\u003c\/li\u003e\n  \u003cli\u003eFlat back design for flush mounting against framing or subfloor surfaces\u003c\/li\u003e\n  \u003cli\u003e1\/2-inch rivet tab with 1\/8-inch rivet holes for secure assembly\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch hemmed edge on register opening and 1\/8-inch hemmed edge on collar for finished, safe edges\u003c\/li\u003e\n  \u003cli\u003e3-inch register opening depth with plus or minus 1\/4-inch tolerance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-construction fitting for residential and light commercial forced-air duct systems using standard 4-inch round collar connections and 4 x 8-inch rectangular register grilles.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a licensed sheet metal contractor or HVAC technician. Shut down the air handling system and confirm the duct branch is de-pressurized before cutting into existing ductwork. Secure the collar to round duct using sheet metal screws or rivets per standard practice, and seal all joints with UL 181-rated foil tape or mastic. Follow local mechanical code requirements for duct support spacing and joint sealing.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot-dipped galvanized steel, ASTM A653 CS Type B G40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Gauge\u003c\/strong\u003e: 30 gauge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollar Gauge\u003c\/strong\u003e: 28 gauge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Dimensions\u003c\/strong\u003e: 4 x 8 x 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollar Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRegister Opening Size\u003c\/strong\u003e: 4 x 8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRegister Opening Depth\u003c\/strong\u003e: 3 inches (plus or minus 1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRegister Opening Edge\u003c\/strong\u003e: 1\/4-inch hemmed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCollar Edge\u003c\/strong\u003e: 1\/8-inch hemmed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRivet Tab\u003c\/strong\u003e: 1\/2 inch with 1\/8-inch rivets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBack Profile\u003c\/strong\u003e: Flat back\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: SOUTHWARK METAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 27r484\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51383122526514,"sku":"27R484","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312674515.webp?v=1782588189","url":"https:\/\/voomisupply.com\/products\/southwark-metal-27r484-straight-register-boot-4x8x4-in","provider":"Voomi Supply","version":"1.0","type":"link"}