{"product_id":"soss-418us19-heavy-duty-fire-rated-invisible-hinge-black","title":"Soss 418US19 Heavy Duty Fire Rated Invisible Hinge Black","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOSS 418US19 is a heavy-duty, fire-rated invisible hinge engineered for 1.75-inch doors in applications where concealed hardware is required. Constructed from alloy steel with a black finish, this hinge installs fully within the door and frame, leaving no exposed hardware when the door is closed. The 418US19 carries a fire rating, making it suitable for fire-rated door assemblies where code compliance is a priority. Installation is typically performed by carpenters, finish contractors, or door hardware specialists working on commercial or high-end residential projects.\u003c\/p\u003e\n\u003cp\u003eThe 418US19 is designed for use with 1.75-inch doors and fits applications where a clean, hardware-free appearance is required on both the door face and the frame. Invisible hinges are commonly specified in commercial office environments, hospitality interiors, residential flush door installations, and any project where aesthetics demand that hinge hardware remain completely hidden. The fire-rated construction broadens its suitability to corridors, stairwells, and other code-governed openings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFully concealed design — no visible hardware when door is closed\u003c\/li\u003e\n  \u003cli\u003eFire-rated construction for use in code-compliant door assemblies\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty alloy steel build for durability in high-cycle applications\u003c\/li\u003e\n  \u003cli\u003eBlack finish for a clean, uniform appearance on dark door and frame stock\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for 1.75-inch door thickness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation invisible hinge for 1.75-inch fire-rated and standard interior door assemblies requiring concealed hardware.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInvisible hinges require precise mortising into both the door edge and the door frame — a router with a manufacturer-supplied template is the standard installation method. Power down any access-control or door-automation hardware before beginning work. Follow applicable building and fire codes, including door assembly listing requirements, when installing on rated openings. Confirm the door assembly fire label remains intact and undamaged after mortising.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black (US19)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoor Thickness\u003c\/strong\u003e: 1.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHinge Leaf Width\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHinge Leaf Length\u003c\/strong\u003e: 4.609 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFire Rated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 5.6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.4 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: Each (EA)\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: SOSS \/ UIP ALLEGION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 418US19\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOSS","offers":[{"title":"Default Title","offer_id":51560672985394,"sku":"418US19","price":319.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d918ff2f698d15f133c06752a3897853.jpg?v=1786455542","url":"https:\/\/voomisupply.com\/products\/soss-418us19-heavy-duty-fire-rated-invisible-hinge-black","provider":"Voomi Supply","version":"1.0","type":"link"}