Hager Hinge 127943 Full Mortise Plain Bearing Hinge 4x4 Bright Brass

Product Description

The HAGER HINGE 127943 is a full mortise, five knuckle, plain bearing door hinge finished in bright brass. Designed for standard-weight door applications, it mounts flush within mortised cutouts on both the door and the door frame, providing a clean installation with no exposed barrel hardware beyond the knuckle assembly. The five-knuckle configuration distributes load across more contact points than a three-knuckle hinge, making it appropriate for higher-cycle commercial and institutional doors. At 4 inches x 4 inches, it fits the most common commercial and light commercial door prep sizes. Installers in commercial construction, tenant improvement, and institutional facilities work with this hinge on hollow metal and wood door assemblies.

This hinge is suited for interior and exterior door installations where a standard-weight, plain bearing hinge meets the load and cycle requirements. Typical applications include office doors, classroom doors, corridor doors, and light-duty commercial entry doors. The bright brass finish is appropriate for facilities specifying warm-tone hardware finishes in hospitality, educational, or commercial office environments. Installation is performed by finish carpenters, door hardware specialists, or commercial contractors working from hardware schedules.

Key Features

• Full mortise design installs flush in door and frame cutouts for a clean, recessed appearance
• Five-knuckle configuration provides increased load distribution versus three-knuckle alternatives
• Plain bearing construction suits standard-weight doors with typical cycle requirements
• 4 inches x 4 inches leaf size fits standard commercial door prep
• Bright brass finish compatible with warm-tone hardware specifications
• Sold individually, with case quantity of 48 units available

Compatibility

Designed as an OEM-style replacement or new-construction hinge for standard-weight full mortise door applications requiring a 4 inches x 4 inches five-knuckle plain bearing hinge.

Installation Notes

Installation is performed by qualified finish carpenters or door hardware technicians following the door manufacturer's hardware schedule and applicable building codes. Mortise pockets in both the door edge and frame must be accurately routed to depth before setting the hinge leaves. Ensure all door hardware, including closers and locks, is de-energized or in a safe state before beginning work on door assemblies. Fasten with fasteners appropriate to the substrate and verify that the door swings freely without binding after installation.