{"product_id":"national-mfg-n350-835-3-5in-spring-adjustable-door-hinge","title":"National Mfg N350-835 3.5in Spring Adjustable Door Hinge","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NATIONAL MFG\/SPECTRUM BRANDS HHI N350-835 is a 3.5-inch satin nickel spring adjustable door hinge designed for standard residential and light commercial door installations. Manufactured from cold rolled steel, this hinge features adjustable closing speed and adjustable spring tension, allowing the installer to dial in the right resistance and return rate for the door weight and traffic conditions. The hinge is UL approved for use on fire-rated doors, making it suitable for code-required applications. Package includes two hinges.\u003c\/p\u003e\u003cp\u003eThis hinge fits standard hinge cutouts, simplifying installation on new construction and replacement projects alike. The 1\/4-inch radius round corners match the most common door and frame mortise profile found in residential and light commercial construction. The satin nickel finish suits interior door applications where a brushed metal appearance is specified. Licensed contractors, carpenters, and door hardware installers working on fire-rated corridor doors, stairwell doors, or standard passage doors will find this a direct drop-in replacement in most existing cutouts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAdjustable closing speed lets the installer control how quickly the door returns to closed position\u003c\/li\u003e\n\u003cli\u003eAdjustable spring tension accommodates varying door weights and usage frequencies\u003c\/li\u003e\n\u003cli\u003eUL approved for fire-rated door applications, supporting code-compliant installations\u003c\/li\u003e\n\u003cli\u003eFits standard hinge cutout — no mortise modification required in most cases\u003c\/li\u003e\n\u003cli\u003e1\/4-inch radius round corners match the most common door and frame profile\u003c\/li\u003e\n\u003cli\u003eCold rolled steel construction for durability in high-cycle door applications\u003c\/li\u003e\n\u003cli\u003eSatin nickel finish provides a clean, brushed appearance for interior use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation spring hinge for standard residential and light commercial doors with a 3.5-inch hinge mortise cutout and 1\/4-inch radius corners.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a licensed carpenter, door hardware installer, or general contractor. Remove the door from the frame before replacing hinges and ensure power tools are not required near electrical panels or live circuits. For fire-rated door assemblies, verify that all hardware, including the hinge, meets the requirements of the applicable fire door listing and local building code before installation. Confirm the spring tension adjustment is set and tested before returning the door to service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinge Size\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cold Rolled Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosing Speed\u003c\/strong\u003e: Adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Tension\u003c\/strong\u003e: Adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: UL Approved for Fire Doors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NATIONAL MFG\/SPECTRUM BRANDS HHI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N350-835\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL HARDWARE","offers":[{"title":"Default Title","offer_id":51558326305074,"sku":"N350-835","price":38.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/72d09a303e80c7b1ba2183855b35a80f.jpg?v=1786409517","url":"https:\/\/voomisupply.com\/products\/national-mfg-n350-835-3-5in-spring-adjustable-door-hinge","provider":"Voomi Supply","version":"1.0","type":"link"}