This is a full mortise hinge with concealed anti-friction bearings, built for heavy weight commercial doors. It mounts in a mortised door and frame and carries the door on bearings for smooth swing. It has a non-removable pin. Part AB850N 4-1/2X4-1/2 US26D is the Heavy Weight, 4-1/2 x 4-1/2 in, Brass, 3 Knuckle, Non-Removable Pin version in Satin Chrome.

• Heavy Weight
• 4-1/2 x 4-1/2 in
• Brass
• 3 Knuckle
• Non-Removable Pin
• Finish US26D Satin Chrome
• Fire rated: 3 Hours {A}
• Part number AB850N 4-1/2X4-1/2 US26D