Hager Hinge 1279312L1 Full Mortise Plain Bearing Hinge Flat Black

Product Description

The HAGER HINGE 1279312L1 is a full mortise, five knuckle, plain bearing hinge in a flat black finish designed for standard-weight door applications. Measuring 3.5 inches by 3.5 inches, this hinge fits mortised door and frame preparations found in light commercial and residential construction. The five knuckle design provides a clean, traditional profile, while the plain bearing construction suits moderate-frequency swing doors that do not require ball bearing or anti-friction upgrades. Licensed contractors and finish carpenters install this type of hinge as part of a complete door hardware set.

This hinge is suited for interior and light-duty exterior door applications where a standard-weight, full mortise hinge is specified. It is commonly installed on hollow metal, wood, or composite doors in residential construction and light commercial projects. The flat black finish coordinates with modern and transitional hardware finishes. Sold individually, it integrates into standard three-hinge or four-hinge door preparations per typical building specifications.

Key Features

• Full mortise design for flush installation into door edge and frame
• Five knuckle construction provides a traditional, clean appearance
• Plain bearing pivot suits standard-frequency, standard-weight door operation
• Flat black finish for compatibility with modern and transitional hardware sets
• 3.5 inches x 3.5 inches leaf size fits standard residential and light commercial door preparations
• Sold per each for flexible quantity ordering

Compatibility

Designed as an OEM-style replacement or new-installation hinge for standard-weight full mortise door preparations requiring a 3.5 inches x 3.5 inches five knuckle plain bearing hinge.

Installation Notes

Installation is performed by finish carpenters, general contractors, or licensed door hardware installers. Power down any access-control or electrified hardware tied to the door before beginning work. Mortise pockets in the door edge and frame must be sized to the leaf dimensions before seating the hinge. Fasten with appropriate wood or machine screws per the door and frame material; do not overdrive fasteners into the hinge leaf countersinks.