McKinney TA386-4-1/2x4-1/2-US32D-NRP Full Mortise Heavy Weight Concealed Bearing Hinge, Three Knuckle, 4-1/2" x 4-1/2", Non Removable Pin, Square Corner, 630 Satin Stainless Steel Finish

The McKinney TA386-4-1/2x4-1/2-US32D-NRP is a full mortise, heavy weight hinge built for high-frequency and high-traffic openings where durability matters most. Constructed from stainless steel with a 630 satin stainless finish, it features a three-knuckle concealed bearing design that carries the load smoothly while resisting wear over years of service. The 4-1/2" x 4-1/2" size with square corners suits standard commercial door and frame prep, and the non-removable pin (NRP) adds security by preventing pin removal on out-swinging exterior doors. Ideal for schools, hospitals, and other institutional settings, this hinge delivers reliable, long-term performance where strength and corrosion resistance are essential.

Features

• Heavy weight construction engineered for high-frequency, high-traffic openings.
• Concealed bearing design provides smooth operation and extended service life.
• Three-knuckle configuration offers dependable strength and support.
• Non-removable pin (NRP) enhances security on out-swinging exterior doors.
• Durable 630 satin stainless steel finish resists corrosion and wear.
• 4-1/2" x 4-1/2" size with square corners fits standard commercial preps.

Functional Details

The concealed bearing system positions the bearings within the barrel of the hinge, keeping them hidden from view while allowing consistent, low-friction movement under heavy loads. The non-removable pin feature secures the pin in place so it cannot be removed once installed, protecting exterior doors against tampering.