Single Action Spring Hinge Self-Closing 8 Holes, 4 Knuckles 3-1/8"W Alumite

Single Action Spring Hinge Self-Closing For Doors

Single Action Spring Hinge Self-Closing describes this Sugatsune America hinge that uses a spring loaded design to return a door to the closed position, which helps doors stay shut without relying on additional latches for basic closing motion. The single action spring hinge works in one direction, so the door swings normally in the intended direction and then self closes, supporting predictable movement in tight or high-traffic areas. A 3-1/8 inch wide hinge body provides a substantial mounting footprint, helping spread door loads across a wider area of the frame. The Alumite finish on this single action spring hinge adds a treated surface, supporting a consistent appearance where exposed hinge leaves are visible in cabinets or light interior door applications. Four knuckles form the hinge barrel, giving the spring a defined pivot point to control the closing action across the full swing arc.

Key Spring Hinge Details That Drive Performance

• The spring loaded design creates the self closing function, so once a door is opened and released, the internal spring returns it toward the frame, which can reduce doors being left ajar in everyday use.
• Adjustable closing speed lets the installer fine tune how quickly the door returns, helping match the motion to door weight and application so movement feels controlled instead of abrupt.
• The 3-1/8 inch width provides a generous mounting surface, helping distribute forces from the door into the mounting structure, which can support stable alignment over time.
• Eight holes designed for #8 flathead countersunk screws, 3/4 inch or longer, create multiple fastening points, helping the hinge grip both door and frame securely when properly fastened.
• The Alumite finish gives the hinge a finished metal surface, which supports a uniform look on exposed installations where hinge hardware is part of the visible layout.
• Four knuckles in the barrel guide the pivot action, helping the spring move the door smoothly along a defined axis for consistent opening and closing behavior.

Wall Mounted Spring Hinge Installation Details

This single action spring hinge can be wall mounted, so the leaf can attach directly to a wall or jamb, giving flexibility in framing conditions such as cabinet sides or partition walls. The hinge is designed to use eight #8 flathead countersunk screws, 3/4 inch or longer, which means the screw heads sit flush to the leaf surface, helping doors clear the hinge area during swing. Using 3/4 inch or longer screws allows the fasteners to penetrate into the mounting material, which supports a solid grip when the door weight loads the hinge. The adjustable closing speed feature works after mounting by changing spring tension, which lets the installer tailor the self closing behavior to the door weight and preferred closing rate. With a 3-1/8 inch wide hinge body, there is room on the leaf to position screws over solid material, helping support long-term hinge stability.

How The JSA-120A Spring Hinge Performs In Use

Where This Single Action Spring Hinge Fits Best

The Sugatsune America JSA-120A single action spring hinge fits applications where a door needs to return to closed using spring force, such as small doors in woodworking projects handled by Wurth Baer Supply customers. As a spring door hinge 3-1/8 W alum model, it combines a defined width and Alumite finish, which suits exposed hinge locations on cabinets or utility doors where a treated metal appearance is desired. The hinge belongs to the Specialty Hinges category, so it addresses situations where standard butt hinges do not provide the needed self closing behavior. Wall mounted capability means it can mount to a wall, jamb, or cabinet side, supporting layouts where one side of the opening is a flat vertical surface. Because it is a single action design, the hinge is suited to doors that swing primarily in one direction and then self close along that same path.

Why These Spring Hinge Details Support Reliable Results

The JSA-120A spring hinge uses a spring loaded mechanism with adjustable closing speed, which helps installers tune the return motion so doors close firmly without slamming, supporting repeatable behavior across multiple openings. Eight holes configured for #8 flathead countersunk screws, 3/4 inch or longer, distribute pull-out forces across more fasteners, which supports resistance to bending when the door is operated repeatedly in commercial or shop environments. Four knuckles on the barrel provide a stable pivot structure, helping the spring transmit force smoothly to the leaf so movement feels consistent through the swing. The Alumite finish on this Sugatsune single action spring hinge creates a treated surface that supports an even, finished look wherever hinge leaves are visible on casework supplied by Wurth Baer Supply. The 3-1/8 inch width gives designers a predictable dimension for laying out hinge positions on doors and frames so clearances and reveals around the hinge stile stay consistent from unit to unit during fabrication.

Common Questions About The JSA-120A Spring Hinge

Select The JSA-120A Hinge For Self Closing Control

The Sugatsune America JSA-120A single action spring hinge from Wurth Baer Supply pairs spring loaded self closing with adjustable closing speed, giving installers control over door return in one direction. Its 3-1/8 inch width, four knuckles, and eight-hole layout for #8 flathead countersunk screws, 3/4 inch or longer, support solid, wall mounted installations on frames or cabinet sides. The Alumite finish presents a clean metal look on exposed hinge leaves, aligning with woodworking projects that value both function and appearance. Use this spring door hinge 3-1/8 W alum model when a defined self closing action and stable mounting footprint are important to the finished opening.