Soss 218US26 Heavy Duty Invisible Hinge Bright Chrome

Product Description

The SOSS / UIP ALLEGION 218US26 is a heavy-duty invisible hinge designed for doors measuring 1-3/4 inches thick. Unlike surface-mounted hinges, the 218US26 is fully concealed when the door is closed, leaving no visible hardware on the door edge or frame. The hinge body measures approximately 1-1/8 inches wide by 4-5/8 inches in length and carries a bright chrome finish for a clean, finished appearance. Weighing 2.1 pounds, it is built for durability in residential and light commercial applications. Installation requires precise mortising into both the door edge and the frame jamb. This hinge is typically installed by carpenters, millwork contractors, or finish tradespeople working on interior door assemblies.

The 218US26 is suited for interior door installations where concealed hardware is required for aesthetic or functional reasons. Common applications include high-end residential interior doors, commercial office doors, and specialty architectural millwork where a clean door edge profile is specified. The hinge is rated for heavy-duty use and is appropriate for solid wood or solid-core doors at the 1-3/4 inch thickness specification. It is sold as a single unit and is typically installed in sets of two or more hinges per door depending on door height and weight.

Key Features

• Fully concealed when door is closed — no visible hinge hardware on door edge or frame
• Designed for 1-3/4 inch thick doors
• Bright chrome finish for a polished, architectural appearance
• Heavy-duty construction rated for solid and solid-core doors
• Compact mortise profile at approximately 1-1/8 inches wide by 4-5/8 inches length
• Sold individually — allows specifying exact hinge count per door

Compatibility

Designed as an OEM-style invisible hinge replacement for 1-3/4 inch thick interior doors requiring concealed hardware. Consult door manufacturer specifications to confirm mortise dimensions and hinge count before ordering.

Installation Notes

Installation of invisible hinges requires precise mortise routing into both the door edge and the door frame jamb — accurate layout and a router with a sharp straight bit are essential. Power down any electric door hardware and ensure the door is fully removed from the opening before beginning mortise work. A licensed carpenter or millwork installer familiar with concealed hinge systems should perform the installation. Follow applicable local building codes for door hardware installation in commercial occupancies.