Soss 212US3.SOSS Invisible Hinge Medium Duty Bright Brass

Product Description

The SOSS 212US3.SOSS is a medium-duty invisible hinge designed to be fully concealed within the door and frame when closed, leaving no hardware visible from either side. Finished in bright brass, it measures 0.75 inches by 3.75 inches and is engineered for doors with a thickness of 1.125 inches. The hinge mounts by mortising into both the door edge and the frame jamb, providing a clean line and an uninterrupted surface. It suits interior applications where aesthetics are a priority and structural load requirements fall within the medium-duty range. Installation is performed by finish carpenters, millwork installers, and experienced general contractors.

The 212US3.SOSS is suited for interior residential and light commercial door applications where a flush, hardware-free appearance is required. Typical installations include passage doors, cabinet doors, and specialty millwork where exposed hinges would interrupt the finished look. The bright brass finish coordinates with matching door hardware in traditional and transitional interior designs. Each unit is sold individually, allowing installers to spec the exact quantity needed per door leaf.

Key Features

• Fully concealed when door is closed — no hinge visible from either face
• Bright brass finish for traditional and transitional interior applications
• Sized for 1.125-inch door thickness
• Medium-duty construction suitable for standard interior passage doors
• Mortise-mount design integrates flush with door edge and frame jamb
• Sold individually for precise quantity ordering

Compatibility

Designed as an OEM-style invisible hinge replacement or new-installation component for interior doors with a 1.125-inch door thickness requiring a medium-duty concealed hinge solution.

Installation Notes

Installation requires precise mortise routing into both the door edge and the door frame jamb; a router with a properly sized template is the standard tool for this work. Verify door thickness and jamb depth before routing to ensure full hinge seating without binding. Follow applicable local building codes for door hardware installations in commercial settings. Do not force the hinge leaves into undersized mortises, as this can misalign the pivot and cause binding during door operation.