Technical Specifications Parameter Specification Part Number HSR-1628-87775 Description Handwheel Assembly Compatible Actuators Fisher 657/667 Series Pneumatic Actuators (verify specific model compatibility) Function Manual override for valve stem positioning Operation Manual rotation of handwheel to drive valve stem Mounting Bolted connection to actuator yoke Materials - Handwheel/Bracket: Coated carbon steel or aluminum - Lead Screw/Yoke Nut: Stainless steel - Hardware: Zinc-plated or stainless steel Environmental Rating Standard industrial grade (suitable for indoor/outdoor use)