{"product_id":"best-711068853-full-mortise-concealed-hinge-4-5in-steel","title":"Best 711068853 Full Mortise Concealed Hinge 4.5in Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BEST 711068853 is a full-mortise concealed hinge designed for commercial and heavy-duty residential door applications. Built from steel with a satin chrome finish, this hinge features a 4.5-inch door leaf height and a 0.134-inch leaf thickness, providing a low-profile, flush-mount installation that sits within a mortised cutout on both the door and frame. The stainless steel pin runs 0.311 inches in diameter and rides on two ball bearings for smooth, consistent operation. Eight mounting holes distribute load evenly across the leaf. This hinge is classified under ANSI A8112 and meets BHMA standards, making it suitable for code-required commercial door hardware installations. Licensed door hardware technicians and commercial carpenters are the typical installers.\u003c\/p\u003e\u003cp\u003eThis hinge is suited for full-mortise door applications where the hinge leaf must be recessed flush into both the door edge and the frame. The 4.5-inch frame leaf height matches the door leaf, ensuring symmetrical alignment. With a 5-knuckle design and dual ball bearings, this hinge handles the frequent-cycle demands of commercial entryways, office doors, and institutional settings. The satin chrome finish carries the Stanley finish code US26D, making it a straightforward match for hardware suites that specify that finish designation. This hinge is sold individually.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFull-mortise mount type — both leaves recess flush into the door edge and frame\u003c\/li\u003e\n\u003cli\u003e5-knuckle, 2 ball-bearing design for smooth, high-cycle operation\u003c\/li\u003e\n\u003cli\u003eSteel hinge body with satin chrome finish (Stanley code US26D)\u003c\/li\u003e\n\u003cli\u003eStainless steel pin, 0.311 inches in diameter\u003c\/li\u003e\n\u003cli\u003e8 mounting holes for secure load distribution across both leaves\u003c\/li\u003e\n\u003cli\u003eMeets ANSI A8112 and BHMA standards for commercial door hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation full-mortise hinge for commercial and heavy-duty residential doors requiring a 4.5-inch leaf height and ANSI A8112 compliance. Also referenced under manufacturer part number FBB179 NRP.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires precise mortising of both the door edge and the frame to accept the leaf thickness of 0.134 inches; use a sharp chisel or router jig for clean, flush cutouts. Power down any electrified hardware connected to the door frame before beginning work. Follow local building codes and BHMA guidelines for fastener selection and hinge count per door weight and frequency rating. The non-removable pin (NRP) designation means the pin cannot be extracted from the exterior side — verify this is appropriate for the door swing and security requirement before installing.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Full Mortise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoor Leaf Height\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Leaf Height\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeaf Thickness\u003c\/strong\u003e: 0.134 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Knuckles\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Ball Bearings\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Mounting Holes\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Diameter\u003c\/strong\u003e: 0.311 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinge Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Chrome (US26D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass\u003c\/strong\u003e: 179FBB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI A8112, BHMA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: BEST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 711068853\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BEST","offers":[{"title":"Default Title","offer_id":51698301141298,"sku":"711068853","price":31.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/02e0745a8fd38d44e3261be4178d546e.jpg?v=1788360791","url":"https:\/\/voomisupply.com\/products\/best-711068853-full-mortise-concealed-hinge-4-5in-steel","provider":"Voomi Supply","version":"1.0","type":"link"}