Hager Hinge BB12794L1 Full Mortise Ball Bearing Hinge 4x4

Product Description

The HAGER HINGE BB12794L1 is a full mortise, standard weight ball bearing hinge finished in flat black. It is designed for commercial and residential door applications where smooth, low-friction operation and long service life are required. The full mortise configuration seats flush within routed pockets in both the door edge and the door frame, producing a clean, finished appearance. Ball bearing knuckles reduce wear under continuous use, making this hinge well suited for frequently operated doors. Licensed contractors, carpenters, and door hardware installers typically specify this hinge for hollow metal, wood, and aluminum frame assemblies.

The BB12794L1 is appropriate for interior and light-duty commercial door installations. Its 4 inches x 4 inches leaf size accommodates standard-weight doors in office, retail, institutional, and residential settings. The flat black finish coordinates with contemporary door hardware trim packages. This hinge is sold as an individual unit and is commonly ordered in quantity for multi-door projects.

Key Features

• Full mortise design seats flush in door edge and frame for a clean finished look
• Ball bearing knuckles provide low-friction, long-service operation on high-cycle doors
• 4 inches x 4 inches leaf dimensions suit standard-weight door applications
• Flat black finish for compatibility with modern door hardware trim
• Standard weight classification appropriate for typical interior and light commercial doors

Compatibility

Designed as an OEM-style full mortise replacement hinge for standard-weight interior and light commercial doors requiring a 4 inches x 4 inches hinge leaf.

Installation Notes

Installation is performed by carpenters, door hardware technicians, or licensed contractors familiar with door prep and mortising. The door and frame must be routed to the correct mortise depth before seating the hinge leaves. Ensure the door is properly supported and all hardware is aligned before final fastening. Refer to applicable building codes and the door manufacturer specifications for hinge quantity and placement requirements.