{"product_id":"national-marker-n830250-square-corner-door-hinge","title":"National Marker N830250 Square Corner Door Hinge","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NATIONAL MARKER N830250 is a 3-inch square corner door hinge finished in satin nickel, designed for full mortise installation in residential and light commercial door applications. Built from heavy-gauge cold-rolled steel, it delivers the structural rigidity required for repeated daily use. The 5-knuckle design distributes door weight evenly across the barrel, reducing wear over time. A flush pin gives the installed hinge a clean, finished look, while countersunk screw holes allow fastener heads to sit flush with the hinge leaf. This hinge is typically installed by carpenters, general contractors, or experienced DIYers during door hanging or replacement projects.\u003c\/p\u003e\n\u003cp\u003eThis hinge fits standard interior and exterior door applications where a 3-inch square corner full mortise hinge is specified. The removable pin simplifies door installation and removal, making it practical for situations where doors need to be taken down for finishing, painting, or seasonal adjustment. The satin nickel finish suits a range of door hardware finishes common in residential construction and renovation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-gauge cold-rolled steel construction for added load-bearing strength\u003c\/li\u003e\n  \u003cli\u003e5-knuckle full mortise design for even weight distribution and smooth pivot action\u003c\/li\u003e\n  \u003cli\u003eRemovable pin for easier door installation and removal\u003c\/li\u003e\n  \u003cli\u003eFlush pin design for a clean, finished appearance when installed\u003c\/li\u003e\n  \u003cli\u003eCountersunk screw holes allow fasteners to sit flush with the hinge leaf\u003c\/li\u003e\n  \u003cli\u003eSquare corners for precise mortise fitment in standard door frames\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation hinge for standard 3-inch square corner full mortise door applications in residential and light commercial construction.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a carpenter or general contractor using a chisel and router to cut the mortise recess in the door and frame. Power should be disconnected from any adjacent electric strike or access control hardware before beginning work. Ensure the mortise depth matches the hinge leaf thickness for a flush fit. Follow local building codes for door hardware specifications on fire-rated or egress door assemblies.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHinge Size\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Style\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign\u003c\/strong\u003e: 5-knuckle full mortise\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\u003eFinish\u003c\/strong\u003e: Satin nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Type\u003c\/strong\u003e: Removable flush pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Holes\u003c\/strong\u003e: Countersunk\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.306 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 00886780009903\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 MARKER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N830250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL MARKER","offers":[{"title":"Default Title","offer_id":51346413781298,"sku":"N830250","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310550714.jpg?v=1782079492","url":"https:\/\/voomisupply.com\/products\/national-marker-n830250-square-corner-door-hinge","provider":"Voomi Supply","version":"1.0","type":"link"}