Hager Hinge 127931215 Full Mortise Plain Bearing Hinge 3.5in Satin

Product Description

The HAGER HINGE 127931215 is a full mortise, five knuckle, plain bearing hinge in a satin nickel finish, sized at 3.5 inches x 3.5 inches. Designed for standard weight door applications, this hinge is surface-mortised into the door edge and frame to provide a clean, flush installation. The five knuckle design distributes load across the hinge barrel, and the plain bearing construction suits standard-duty interior and light commercial door assemblies. Sold individually, this hinge is a direct hardware item for carpenters, door installers, and general contractors working on residential or light commercial projects.

This hinge is appropriate for standard weight interior and exterior door installations where a full mortise configuration is required. The satin nickel finish coordinates with a wide range of door hardware finishes commonly found in residential and light commercial construction. The 3.5-inch leaf size is a common fit for standard 1.75-inch thick interior passage doors. Installers working on new construction or retrofit projects will find this hinge suited to typical wood door frames and door blanks requiring a mortise pocket routed into both the door edge and the jamb.

Key Features

• Full mortise configuration for a flush, concealed installation in door edge and frame
• Five knuckle barrel design for improved load distribution across the hinge pin
• Plain bearing construction suited for standard weight door applications
• Satin nickel finish for corrosion resistance and finish compatibility with common hardware sets
• 3.5 inches x 3.5 inches leaf dimensions — a standard size for residential interior doors
• Lightweight at 0.6 pounds, suitable for standard weight door classifications

Compatibility

Designed as an OEM-style replacement or new installation hinge for standard weight, full mortise door applications in residential and light commercial construction.

Installation Notes

Installation is performed by carpenters or door hardware installers using a router or chisel to cut mortise pockets into the door edge and door jamb to the correct depth before mounting. Ensure the hinge leaves sit fully flush with the wood surface to prevent binding or misalignment when the door is closed. Follow local building codes and door manufacturer specifications for hinge quantity and placement based on door height and weight. Avoid overtightening screws into the mortise pocket, as this can cause wood splitting or hinge leaf distortion.