FORMERLY MCKINNEY DOOR SOLUTIONS & AMERICAN DOOR PRODUCTS - NOW UNITED AS AMERICAN DOORS.
The most common hinge type, consisting of two rectangular leaves joined by a pin-connected knuckle. Butt hinges mount with one leaf mortised into the door edge and one into the jamb.
Commercial butt hinges are typically five-knuckle design with steel, stainless steel, or brass construction. Standard sizes include 4-1/2″ x 4-1/2″ (standard commercial), 5″ x 4-1/2″ (heavy commercial), and 4″ x 4″ (medium frequency). Template hinges have standardized hole patterns for machine-prepped doors and frames.
Options include ball bearing (smooth operation, heavy-duty), plain bearing (light duty), hospital tip (sloped ends prevent injury), non-removable pin (NRP for security), and spring hinges (self-closing). Fire-rated doors require steel hinges with fire labels. Related: continuous hinge, pivot hinge, concealed hinge. Brands include McKinney and Hager. Shop hinges.
