Soss 418SSUS32D Fire Rated Invisible Hinge Satin Stainless

Product Description

The SOSS UIP ALLEGION 418SSUS32D is a heavy-duty, fire-rated invisible hinge designed for 1-3/4 inch thick doors. When installed, the hinge is completely concealed within the door and frame, leaving no visible hardware on the face of the door. This makes it a preferred choice for commercial and high-end residential applications where a clean door profile is required. The hinge is constructed in a satin stainless steel finish, offering corrosion resistance suitable for demanding environments. Installation requires precise mortising into both the door edge and the door frame, a task typically performed by a finish carpenter or millwork specialist.

The 418SSUS32D is suited for use in commercial and residential door assemblies requiring fire-rated hardware. Its invisible design integrates into the door structure, making it appropriate for interior doors in office buildings, hospitality spaces, healthcare facilities, and upscale residential projects. The satin stainless steel finish provides durability in high-traffic areas. This hinge is intended for 1-3/4 inch doors and is sold individually as a single unit.

Key Features

• Completely concealed when door is closed — no exposed hinge hardware on door face
• Fire-rated construction for use in compliant door assemblies
• Heavy-duty design for demanding commercial and residential applications
• Satin stainless steel finish for corrosion resistance and clean aesthetics
• Designed for 1-3/4 inch thick doors
• Sold as a single unit (EA)

Compatibility

Designed for use with 1-3/4 inch thick doors requiring a fire-rated invisible hinge in a satin stainless steel finish. Confirm door and frame material compatibility and fire-rating assembly requirements before installation.

Installation Notes

Installation of this invisible hinge requires precise mortising into both the door edge and the door frame jamb. Power should be de-energized for any door assemblies with integrated electrical components before beginning work. Confirm that the full door assembly — including frame, hinge, and hardware — meets applicable fire-rating certifications as required by local building codes before installation. Work should be performed by a qualified finish carpenter, door hardware specialist, or licensed contractor familiar with fire-rated door assemblies.