Soss 216US4 Invisible Hinge Satin Brass Medium Duty

Product Description

The SOSS 216US4 is a medium-duty invisible hinge finished in satin brass, designed for interior doors measuring 1-3/8 inches in thickness. When the door is closed, the hinge body folds completely inside the door and jamb mortise, leaving no exposed hardware on the face of the door. This concealed design is used in residential and commercial millwork applications where a clean door edge is required. The hinge measures 1 inch in width by 4-5/8 inches in length and is sold as a single unit. Installation requires precise mortise routing and is typically performed by carpenters, finish trimmers, or door hardware specialists.

The 216US4 is suited for interior door applications where surface-mounted butt hinges or barrel hinges would compromise the finished appearance. Common install scenarios include bedroom and office doors, custom cabinetry doors, and architectural millwork requiring a flush, hardware-free door edge. The satin brass finish coordinates with standard architectural hardware finishes used in residential and light commercial interiors. This hinge is appropriate for doors in the medium-duty weight range and is not intended for heavy commercial or high-cycle fire-rated assemblies unless separately rated documentation applies.

Key Features

• Fully concealed when door is closed — no visible hinge barrel or leaves on door face
• Satin brass finish for coordination with standard architectural hardware
• Sized for 1-3/8 inch thick doors — standard interior door thickness
• Medium-duty construction suitable for residential and light commercial interior doors
• Sold as a single hinge unit (EA)
• Compact folded profile at 1 inch x 4-5/8 inches for precise mortise fitting

Compatibility

Designed as an OEM-style replacement or new-install invisible hinge for interior doors with a 1-3/8 inch door thickness. Consult the SOSS mortise template for the 216 series to confirm mortise dimensions before installation.

Installation Notes

Invisible hinges require precise mortise routing on both the door edge and the door jamb — use the manufacturer-supplied or series-specific mortise template to ensure accurate pocket dimensions. A licensed finish carpenter or experienced door hardware installer should perform the mortise work. Confirm door and jamb material is solid enough to accept a full mortise without compromising structural integrity of the door edge. Always test hinge operation with the door off the jamb before final fastener seating.