{"product_id":"national-mfg-n830-445-3-5-in-square-door-hinge-matte-black","title":"National Mfg N830-445 3.5 in Square Door Hinge Matte Black","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NATIONAL MFG\/SPECTRUM BRANDS HHI N830-445 is a 3.5-inch square door hinge engineered to eliminate door squeak through a military-grade bearing assembly. The SqueakGuard design uses a bearing rated at five times the strength of standard steel, delivering a noise-free operation rated for 30 years. Each pack contains three hinges finished in matte black. Mounting hardware and installation instructions are included. The surface-mount configuration simplifies installation for both trade professionals handling finish carpentry and knowledgeable DIYers completing door hardware replacement.\u003c\/p\u003e\n\u003cp\u003eThis hinge is suited for interior residential door applications where noise reduction and long-term durability are priorities. The square corner profile fits standard door frames calling for a 3.5-inch hinge. The matte black finish coordinates with contemporary hardware finishes. The three-pack format covers a standard single door installation. Surface-mounted application means no mortising is required, reducing installation time on retrofit and new-construction projects alike.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSqueakGuard bearing eliminates door squeak — rated noise-free for 30 years\u003c\/li\u003e\n  \u003cli\u003eMilitary-grade bearing with five times the strength of standard steel\u003c\/li\u003e\n  \u003cli\u003e3.5-inch square corner profile for standard residential door frames\u003c\/li\u003e\n  \u003cli\u003eSurface-mount design — no mortising required\u003c\/li\u003e\n  \u003cli\u003eMatte black finish for modern interior hardware compatibility\u003c\/li\u003e\n  \u003cli\u003eThree hinges per pack with mounting hardware and instructions included\u003c\/li\u003e\n  \u003cli\u003eNational Hardware Lifespan Limited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a surface-mount replacement or new-installation hinge for standard residential interior doors requiring a 3.5-inch square corner hinge.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by carpenters, finish contractors, or experienced DIYers using standard hand tools. Power down any door-related electrical hardware such as electric strikes or access control devices before beginning work. Follow the included mounting hardware instructions and ensure fasteners are driven into solid door frame material for proper load bearing. Do not overtighten screws, as this can strip the mounting surface and reduce hinge performance.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHinge Size\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Style\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Matte Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBearing Type\u003c\/strong\u003e: Military-grade superior bearing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Surface mount\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack Quantity\u003c\/strong\u003e: 3 hinges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity (case)\u003c\/strong\u003e: 15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 19.47 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: Lifespan Limited Lifetime Warranty\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: NATIONAL MFG\/SPECTRUM BRANDS HHI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N830-445\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL HARDWARE","offers":[{"title":"Default Title","offer_id":51559560020274,"sku":"N830-445","price":231.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8924e8797aeb2d5c85d13a9161fe2977.jpg?v=1786435258","url":"https:\/\/voomisupply.com\/products\/national-mfg-n830-445-3-5-in-square-door-hinge-matte-black","provider":"Voomi Supply","version":"1.0","type":"link"}