{"product_id":"mckinney-mpb79-4-1-2x4-full-mortise-macpro-heavy-weight-ball-bearing-hinge-five-knuckle","title":"McKinney MPB79-4-1\/2x4 Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle","description":"\u003ch2\u003eMcKinney MPB79-4-1\/2x4 Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle, 4-1\/2\" x 4\", Square Corner\u003c\/h2\u003e\u003cp\u003eThe McKinney MPB79-4-1\/2x4 is a full mortise, five knuckle ball bearing hinge built for demanding commercial openings that see frequent use. Measuring 4-1\/2\" x 4\" with a square corner template, this MacPro series hinge features a heavy weight design with concealed ball bearings that deliver smooth, quiet operation while supporting the weight of solid core and heavier doors. Manufactured in the USA, it meets ANSI\/BHMA standards and is well suited for schools, hospitals, offices, and other high-traffic environments. Its durable construction and proven bearing system make it a reliable choice where long service life and consistent performance matter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFive knuckle, full mortise design for standard commercial door and frame preparations.\u003c\/li\u003e\n\u003cli\u003eHeavy weight construction rated for solid core and heavier doors.\u003c\/li\u003e\n\u003cli\u003eConcealed ball bearings provide smooth, quiet swing and reduced wear over time.\u003c\/li\u003e\n\u003cli\u003e4-1\/2\" x 4\" size with square corner template for broad compatibility.\u003c\/li\u003e\n\u003cli\u003ePart of McKinney's MacPro line, engineered for durability in high-use openings.\u003c\/li\u003e\n\u003cli\u003eManufactured in the USA to ANSI\/BHMA specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Specifications\u003c\/h4\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMcKinney\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMPB79-4-1\/2x4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMacPro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHinge Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull Mortise Ball Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnuckle Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFive Knuckle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy Weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorner Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSquare Corner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGrade 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBAA Qualified\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimited 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