McKinney MPB79-4-1/2x4-1/2-US10BE-NRP Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle, 4-1/2" x 4-1/2", Non Removable Pin, Square Corner, 613E Dark Oxidized Satin Bronze, Equivalent Finish

The McKinney MPB79-4-1/2x4-1/2-US10BE-NRP is a full mortise MacPro ball bearing hinge built for demanding commercial openings that see steady daily use. Constructed with a five knuckle design and steel base material, it measures 4-1/2" x 4-1/2" and features a square corner profile for standard mortise preparation. The non removable pin (NRP) adds security by preventing pin removal on out-swinging exterior doors, making it a smart choice for entryways where safety matters. Finished in 613E Dark Oxidized Satin Bronze (equivalent), this hinge pairs reliable performance with a clean, professional appearance suited to a wide range of interior and exterior applications.

Features

• Full mortise five knuckle design for standard door and frame preparation.
• Ball bearing construction ensures smooth, long-lasting operation under frequent use.
• Non removable pin (NRP) improves security on out-swinging doors.
• 4-1/2" x 4-1/2" size with a square corner profile.
• Steel base material provides durable, dependable performance.
• Finished in 613E Dark Oxidized Satin Bronze (equivalent) for a refined look.

Functional Details

The non removable pin design prevents the hinge pin from being withdrawn while the door is closed, protecting out-swinging exterior openings from tampering. The ball bearings carry the door load and reduce friction, allowing the hinge to function reliably over extended service life.