Hager Hinge 1279312P Full Mortise Plain Bearing Hinge 3.5in

Product Description

The HAGER HINGE 1279312P is a standard-weight, full mortise, five-knuckle plain bearing door hinge finished in prime coat. Measuring 3.5 inches by 3.5 inches, it is designed to be set flush into a mortised door edge and frame, providing a clean, low-profile installation. The five-knuckle barrel configuration distributes load evenly across the hinge leaf, making it suited for standard interior and light-duty exterior door applications. The prime coat finish accepts field-applied paint, giving installers flexibility to match any finish requirement on site. Sold individually, this hinge is a standard specification item for commercial and residential door hardware assemblies.

This hinge is appropriate for standard-weight door applications in both residential and light commercial construction. It is commonly installed on wood or hollow metal doors and frames requiring a full mortise hinge profile. Carpenters, finish contractors, and door hardware specialists install this type of hinge during new construction rough-in or retrofit door replacement projects. The prime coat surface is ready for painting, making it a practical choice wherever a painted finish is specified but the final color has not yet been determined at rough-in.

Key Features

• Full mortise design seats flush in the door edge and frame for a clean, professional installation
• Five-knuckle barrel provides even load distribution across the hinge leaf
• Plain bearing construction suited for standard-frequency swing doors
• Standard weight rating appropriate for typical interior and light-duty door applications
• Prime coat finish accepts field-applied paint for flexible finish matching
• Sold individually, compatible with standard door hardware specification workflows

Compatibility

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

Installation Notes

Installation is performed by carpenters or door hardware technicians using a chisel or router to prepare the mortise recess in the door edge and frame before fastening. Verify door weight and swing frequency before selecting hinge quantity and spacing per door hardware standards such as ANSI and BHMA guidelines. Apply primer and finish coats after installation to protect the prime coat surface from corrosion in humid environments. Do not install on doors exceeding the standard weight rating for this hinge series.