Soss 212US19 Invisible Hinge Medium Duty Flat Black

Product Description

The SOSS 212US19 is a medium-duty invisible hinge designed for interior doors up to 1-1/8 inches thick. When the door is closed, no hinge hardware is visible from either side, creating a clean, uninterrupted door edge. The flat black finish provides a matte appearance suited to modern millwork and commercial interior applications. Each hinge ships as a single unit and installs by mortising into both the door and the frame. Carpenters, finish millwork contractors, and commercial door hardware installers are the primary trade users for this product. The hinge measures 4.5 inches in length, 2.7 inches in width, and 0.9 inches in height, and weighs 0.8 pounds.

The 212US19 is appropriate for residential and light commercial interior door installations where a concealed hinge profile is specified. Typical applications include wood interior doors in offices, hotels, and high-end residential projects where exposed hinge knuckles are aesthetically undesirable. The hinge accommodates doors that are 1-1/8 inches thick, making it compatible with standard interior door blank thicknesses common in commercial millwork specifications.

Key Features

• Fully concealed design — no hardware visible when door is closed
• Rated for medium-duty applications on 1-1/8 inch thick doors
• Flat black finish for clean, matte appearance in modern interiors
• Compact profile: 4.5 inches long, 2.7 inches wide, 0.9 inches high
• Sold as a single hinge unit (EA)

Compatibility

Designed as an OEM-style replacement or new-installation invisible hinge for interior wood doors measuring 1-1/8 inches in thickness, consistent with standard commercial and residential interior door blank specifications.

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 and frame material hardness before installation, as mortise depth must be consistent on both sides for proper hinge alignment. Follow applicable local building codes and the door manufacturer's hardware specifications when selecting hinge quantity per door. Always confirm the door is fully supported and stationary before routing.