{"product_id":"national-mfg-n830-404-4in-satin-nickel-security-hinge","title":"National Mfg N830-404 4in Satin Nickel Security Hinge","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NATIONAL MFG\/SPECTRUM BRANDS HHI N830-404 is a full mortise security hinge designed for doors in residential and light commercial applications. Built from heavy gauge cold rolled steel, this 4-inch hinge delivers the structural integrity required for high-traffic or security-conscious installations. The flush pin design gives the finished assembly a clean, professional appearance, while countersunk screw holes and included fasteners streamline the installation process. With a rated safe working load of 55 pounds, this hinge is suited for solid wood and hollow metal doors where dependable, long-term performance is required.\u003c\/p\u003e\u003cp\u003eThis hinge is appropriate for interior and exterior door applications where a mortise-style fitting is specified. The square corner design fits standard door prep cutouts without modification. The 5-knuckle construction distributes load across the hinge barrel for improved durability under repeated use. It is commonly installed by carpenters, finish contractors, and general tradespeople during door hanging or replacement work. The removable pin simplifies both installation and future door removal. Each package contains 5 hinges, making it suitable for a full 3-hinge door set with a spare.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHeavy gauge cold rolled steel construction for added strength and durability\u003c\/li\u003e\n\u003cli\u003eFull mortise, square corner design fits standard door prep without modification\u003c\/li\u003e\n\u003cli\u003e5-knuckle barrel distributes load and reduces wear on the hinge pin\u003c\/li\u003e\n\u003cli\u003eFlush pin provides a finished, low-profile appearance on the installed door\u003c\/li\u003e\n\u003cli\u003e55-pound safe working load rating suitable for solid residential doors\u003c\/li\u003e\n\u003cli\u003eCountersunk screw holes with fasteners included for complete installation\u003c\/li\u003e\n\u003cli\u003eRemovable pin for straightforward door installation and removal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation full mortise security hinge for standard residential and light commercial door applications requiring a 4-inch square corner mortise hinge.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a finish carpenter or general contractor using a chisel, mallet, and screwdriver or drill with a driver bit. Ensure the door and frame mortise cutouts are sized correctly for a 4-inch square corner hinge leaf before fastening. Power down any access control or electric strike hardware associated with the door before beginning work. Follow applicable local building codes for door hardware installation in rated assemblies.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinge Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Heavy Gauge Cold Rolled Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnuckle Count\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign Type\u003c\/strong\u003e: Full Mortise, Square Corner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe Working Load\u003c\/strong\u003e: 55 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 5 per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8.35 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: N830-404\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL HARDWARE","offers":[{"title":"Default Title","offer_id":51564189188402,"sku":"N830-404","price":87.11,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/366056689a0eafc2cda948258418a241.jpg?v=1786513790","url":"https:\/\/voomisupply.com\/products\/national-mfg-n830-404-4in-satin-nickel-security-hinge","provider":"Voomi Supply","version":"1.0","type":"link"}