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Double Action Spring Hinge Self-Closing describes this Sugatsune America hinge designed to swing in both directions and return the door closed using spring force. The double action spring hinge design lets a door move either way through an opening, then self-close, which supports traffic flow where hands-free operation is important. The spring loaded for self-closing function uses internal spring tension to pull the door back to the closed position, helping doors stay shut between uses. Adjustable spring tension allows the installer to fine-tune how firmly the door returns, which matters when matching door weight and user comfort. The hinge measures 4-3/4 inches long by 5-1/4 inches wide, giving a substantial bearing surface that helps support typical swing-door sizes in this class. A satin finish provides a clean, subdued appearance that fits many commercial and shop environments without drawing attention. The stainless steel construction stated in the SAP description supports use in typical woodworking and shop settings where strength and corrosion resistance are valued for long-term performance.
This double action spring hinge mounts using its 8 holes, giving multiple fastener points that help anchor the hinge firmly to both door and frame. The 5-1/4 inch width and 4-3/4 inch length dimensions define the leaf coverage on each mounting surface, which matters when laying out mortises or surface positions on stiles and jambs. The 8 knuckles form the double action pivot, so the door can travel in either direction while staying aligned along the hinge line. Adjustable spring tension means the closing force can be increased or reduced after mounting, which is useful when door weight, closer interaction, or user preferences change. The hinge is described as stainless steel in the SAP description, so it is suited to typical interior environments where metal components see regular handling and humidity, supporting dependable motion over time. The satin finish also helps conceal minor handling marks that occur during installation and use.
This Sugatsune America double action spring hinge is suited to openings where the door must swing both inward and outward during normal activity, because the product class is explicitly a double action spring hinge. That double action behavior lets people push through from either side without reaching for a knob, which is helpful in workspaces that need efficient movement between areas. The hinge is spring loaded for self-closing, so after the door is pushed through, the spring pulls it back toward closed, which helps maintain separation for noise, dust, or airflow between rooms. Adjustable spring tension allows tailoring the closing force to the actual door and frame conditions, so a lighter door can close gently and a heavier door can still return reliably. The hinge's 4-3/4 inch length and 5-1/4 inch width give it a substantial footprint on both door and frame, which supports doors within the typical size and weight range for this hardware category. The satin stainless steel noted in the SAP description makes the hinge well-suited to commercial, shop, or cabinetry installations where both appearance and corrosion resistance are valued. The 8 knuckles provide a multi-point pivot line that guides the door through its two-way swing, helping it track consistently through repeated cycles.
The JDA-120-36S model number ties this hinge to a specific Sugatsune America configuration, which helps installers and shops repeat the same hardware choice across multiple doors for consistent performance. Its double action spring hinge class means both leaves and knuckles are engineered for two-way travel, so the pivot geometry supports smooth motion in each direction. The 8-hole layout provides several fastener positions on the leaves, allowing a solid connection that resists loosening under frequent opening and closing. With 8 knuckles sharing the movement, the load is distributed along the hinge barrel, which supports smoother action and reduces concentrated wear at a single pivot point. The adjustable spring tension feature matters after installation because closing force can be tuned if door weight, closer interaction, or usage patterns change over time. The satin stainless steel construction described in the SAP description offers metal strength with a finish that holds up in typical woodworking and shop environments, supporting long service life in regular use. By combining two-way swing, self-closing action, and adjustable tension in one hinge body, this hardware gives installers a compact solution for doors that need predictable return-to-closed behavior without separate closers.
The JDA-120-36S is a double action spring hinge, so it lets a door swing in both directions and use spring force to return toward the closed position after each pass-through.
The adjustable spring tension lets this hinge increase or decrease closing force, so the installer can match door weight and desired swing speed for smoother, more controlled operation.
This Sugatsune America double action spring hinge measures 4-3/4 inches long by 5-1/4 inches wide, giving a broad mounting footprint on both the door edge and the frame.
The 8 knuckles share the pivot movement across multiple joints, which supports smooth double action motion and distributes door load along the hinge barrel.
Spring loaded for self-closing means the internal spring in this hinge pulls the door back toward closed after it is pushed open, helping the opening return to a default closed position.
The SAP description indicates a stainless steel hinge, and the product name lists a satin finish, giving a corrosion-resistant metal body with a low-glare appearance.
This Sugatsune America double action spring hinge combines two-way swing with spring loaded for self-closing performance, giving installers a compact solution where doors must open both directions and return closed. The adjustable spring tension lets you dial in closing force for the actual door, while the 4-3/4 inch by 5-1/4 inch size, 8 holes, and 8 knuckles support stable mounting and consistent motion. The satin stainless steel construction described in the SAP description fits commercial, shop, and cabinetry environments. Select the JDA-120-36S when a specialty double action spring hinge is needed to keep doors moving smoothly and returning to the closed position.