McKinney MPB79-4-1/2x4-US26D-NRP Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle, 4-1/2" x 4", Non Removable Pin, Square Corner, 626 Satin Chrome Finish

The McKinney MPB79-4-1/2x4-US26D-NRP is a full mortise MacPro ball bearing hinge built for demanding commercial openings that see steady daily traffic. Measuring 4-1/2" x 4" with a five knuckle design and a non removable pin (NRP), it delivers smooth, quiet operation while adding security to outswinging exterior doors. The 626 Satin Chrome finish offers a clean, corrosion-resistant appearance that pairs well with most door and frame hardware. Featuring square corners and concealed ball bearings, this hinge is engineered for long service life and dependable performance in offices, schools, healthcare facilities, and other high-use environments where reliability matters.

Features

• Full mortise design for standard hinge preparation on commercial doors and frames.
• Five knuckle construction provides balanced load distribution and smooth swing.
• Ball bearing operation reduces friction for quiet, long-lasting performance.
• Non removable pin (NRP) adds security for outswinging exterior door applications.
• Square corner configuration fits conventional mortised door and frame prep.
• 626 Satin Chrome finish resists wear and corrosion for a durable appearance.

Functional Details

The non removable pin prevents the hinge pin from being taken out while the door is closed, protecting outswing doors from being lifted off their hinges. Concealed ball bearings between the knuckles carry the door weight to ensure consistent, low-friction movement over time.