{"product_id":"national-marker-n139998-4-in-square-steel-broad-door-hinge","title":"National Marker N139998 4 in Square Steel Broad Door Hinge","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NATIONAL MARKER N139998 is a 4-inch square broad door hinge built for general utility and industrial applications. Constructed from galvanized steel with a brass pin, this hinge is swaged for mortise installations, providing a clean, flush fit in pre-routed door and frame applications. The loose removable pin design allows doors to be lifted free of their frame without removing the hinge leaves from either surface. This part is a catalog series V504 through V504BC component, sold individually and suited for both light commercial and industrial service contexts.\u003c\/p\u003e\u003cp\u003eThis hinge is intended for interior and exterior door installations where a mortise-style broad hinge is specified. The swaged leaf profile is compatible with standard mortise routing on wood or metal door frames. The loose pin configuration is commonly specified in industrial facilities, utility rooms, and commercial spaces where frequent door removal is required for maintenance access or equipment movement. A licensed carpenter, millwright, or general contractor typically handles installation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLoose removable brass pin allows door removal without uninstalling hinge leaves\u003c\/li\u003e\n\u003cli\u003eSwaged design engineered specifically for mortise installations\u003c\/li\u003e\n\u003cli\u003eGalvanized steel construction for corrosion resistance in utility and industrial environments\u003c\/li\u003e\n\u003cli\u003e4-inch square leaf profile suits standard broad hinge mortise routing\u003c\/li\u003e\n\u003cli\u003ePart of the National catalog V504 through V504BC series for verified part matching\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement broad door hinge for general utility and industrial mortise door applications. Compatible with standard 4-inch square mortise hinge cutouts on wood or metal doors and frames.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a carpenter, millwright, or general contractor using standard hand tools. Mortise routing should match the 4-inch square leaf dimensions before setting the hinge. Remove all door weight and secure the door before driving hinge screws to ensure proper alignment. Verify that the brass pin seats fully and the swaged leaves sit flush within the mortise before closing the door.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinge Size\u003c\/strong\u003e: 4 inches square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Galvanized steel with brass pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Type\u003c\/strong\u003e: Loose removable pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type\u003c\/strong\u003e: Mortise (swaged leaves)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Series\u003c\/strong\u003e: V504 through V504BC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.645 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each\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 MARKER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N139998\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL MARKER","offers":[{"title":"Default Title","offer_id":51347815727410,"sku":"N139998","price":43.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310550166.jpg?v=1782114354","url":"https:\/\/voomisupply.com\/products\/national-marker-n139998-4-in-square-steel-broad-door-hinge","provider":"Voomi Supply","version":"1.0","type":"link"}