The 18566 Extension Spring #66 is a compact tension spring designed to provide reliable pulling force in mechanical assemblies and equipment repairs. Manufactured from high-strength spring steel, this extension spring delivers consistent tension and dependable return action for mechanisms requiring controlled extension and recoil. With a 7/16" diameter, 5" length, and 0.051 wire diameter, it offers dependable performance for light-duty mechanical applications—because when a spring does its job properly, everything connected to it tends to behave better.
Country of Origin
Varies by production batch
Key Features / Specifications
Ideal For