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Double Action Spring Hinge Self-Closing 4-3/4"L x 4"W Anodized from Sugatsune America is a double action spring hinge designed for doors needing movement in both directions, so doors can swing either way in a single opening. The hinge is spring loaded for self-closing, so the door returns to its resting position without manual repositioning after each cycle. Its adjustable spring tension lets installers tune how firmly the door closes, which helps match the hinge to door weight and traffic patterns. The 4-3/4 inch length and 4 inch width define the hinge footprint, guiding layout on the door edge and frame. Eight knuckles create the central pivot structure, which supports the double action movement along the hinge line during repeated openings. This hinge belongs to the specialty hinges category, reflecting its role in applications where standard hinges do not provide the desired swing action.
This double action spring hinge works as a specialty hinge, so it supports doors that swing both directions through the opening rather than only one way. The spring loaded for self-closing function means the hinge actively pulls the door back after movement, so the installer can plan door stops and clearances around a consistent return motion. Adjustable spring tension is built into the hinge, so the closing action can be tightened or relaxed during set-up instead of relying on a fixed factory force. The 4-3/4 inch by 4 inch size gives predictable leaf coverage on the door and frame, which helps align mortises or surface positions across multiple hinges. With eight knuckles forming the hinge barrel, the pivot line stays defined along the edge of the door as it moves through its double action swing.
This product is a Double Action Spring Hinge Self-Closing 4-3/4"L x 4"W Anodized from Sugatsune America, so it is suited to openings that benefit from traffic moving in either direction through a doorway. As a double action spring hinge, it lets doors swing forward and backward around the hinge line, which supports applications where users approach the door from both sides during normal activity. The specialty hinges classification places this hinge in situations where conventional single-swing hinges would restrict movement, so it addresses layouts that need two-way passage. Being spring loaded for self-closing, the hinge supports door panels that should not stay in a randomly open position, which is practical when a consistent closed or resting position is preferred after use. The 4-3/4 inch length and 4 inch width coordinate to create a recognizable mounting footprint, which helps installers apply the same sizing standard across several similar doors.
The spring loaded for self-closing with adjustable spring tension design gives this hinge its controllable action, so the closing force is not fixed for every door. Adjustable spring tension lets installers set the door return strength to suit the specific panel weight and expected cycle rate, which helps avoid overly aggressive or weak closing motion during service. When several Double Action Spring Hinge Self-Closing 4-3/4"L x 4"W Anodized units are installed on multiple doors, the ability to tune the spring tension supports more uniform door behavior across the run. Eight knuckles form the hinge pivot assembly, which supports smooth movement as the door swings in either direction under the adjusted spring load. The Sugatsune America brand and the JDA-120-30A part number identify the hinge consistently, which aligns ordering and replacement with the same adjustable spring tension performance profile on future projects.
The double action spring hinge allows the door to swing in both directions around the hinge line, which supports openings where traffic approaches from either side during normal use.
The adjustable spring tension on this spring loaded hinge sets how firmly the door returns, so the closing action can be matched to door weight and desired feel in operation.
This Double Action Spring Hinge Self-Closing is 4-3/4 inches long and 4 inches wide, defining the hinge footprint used for layout on the door and frame.
The eight knuckles create a multi-part pivot barrel that supports the double action movement, helping the door swing smoothly in both directions along a stable hinge line.
The anodized description refers to the hinge finish context, supporting a consistent, finished look where the hinge is visible on the door installation.
This hinge is identified as Sugatsune America Double Action Spring Hinge Self-Closing 4-3/4"L x 4"W Anodized with manufacturer part number JDA-120-30A.
The Double Action Spring Hinge Self-Closing 4-3/4"L x 4"W Anodized brings double action swing, spring loaded self-closing, and adjustable spring tension together in one Sugatsune America hinge, so installers can match hinge action to active openings. The defined 4-3/4 inch by 4 inch dimensions and eight-knuckle pivot structure support predictable layout and motion, which suits repeat work across similar doors. For projects calling for a double action spring hinge with tunable closing behavior, the JDA-120-30A part number provides a clear reference point when planning and sourcing through Wurth Baer Supply.