Hager Hinge BB127943 Full Mortise Ball Bearing Hinge 4x4

Product Description

The HAGER HINGE BB127943 is a full mortise, standard weight ball bearing hinge finished in bright brass. It is designed for interior and exterior door applications where smooth, low-friction operation and lasting finish quality are required. The full mortise configuration seats flush into the door edge and frame, providing a clean, professional installation. Ball bearings at the knuckle reduce wear under repetitive use, making this hinge appropriate for residential and light commercial doors. Licensed carpenters, door hardware installers, and general contractors typically specify and install this hardware on wood and hollow metal door assemblies.

The BB127943 is suited for standard-weight door applications in residential and light commercial settings. The 4 inches x 4 inches leaf size covers common interior and exterior door thicknesses and widths within the standard weight category. The bright brass finish coordinates with matching door hardware sets. It is sold individually and is available in case quantities of 48 units, making it practical for both single-door service calls and larger hardware package installs on new construction or renovation projects.

Key Features

• Full mortise design seats flush into door edge and frame for a clean, finished appearance
• Ball bearing construction reduces friction and wear for smooth door operation over time
• 4 inches x 4 inches leaf dimensions suit standard residential and light commercial doors
• Bright brass finish provides a classic, polished look compatible with coordinating hardware sets
• Standard weight rating appropriate for typical interior and exterior door assemblies
• Sold individually with a case quantity of 48 for project-scale procurement

Compatibility

Designed as an OEM-style full mortise replacement hinge for standard weight residential and light commercial door assemblies requiring a 4 inches x 4 inches ball bearing hinge in a bright brass finish.

Installation Notes

Full mortise hinges are installed by licensed carpenters or door hardware technicians using a chisel, router, or mortise jig to cut precise leaf recesses into both the door edge and the door frame. Ensure the door is properly supported and the mortise depth matches the leaf thickness for a flush fit before fastening. Follow applicable building codes for hinge quantity and placement based on door height and weight. Do not force or over-drive screws, as this can strip the mortise and compromise hinge alignment.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.