Designed to facilitate the attachment of the manufacturer’s EF spring return actuators to a damper’s jackshaft, the ZG-JSL linkage simplifies typical installations and eliminates the difficulties where jackshaft bearings are hard to access. The linkage has a built-in shaft that allows the direct coupling of the company’s actuators. The anti-rotation plate enables the installed actuator to be rotated 90 degrees for space-saving applications. The linkage has an open-end design to fasten to any jackshaft from ½ to 1.05 inches in diameter. It has a universal clamp designed to accommodate ½- to 1-inch shafts.