Gardner Spring 37066GS Extension Spring 0.5 in Od Stainless

Product Description

The GARDNER SPRING 37066GS is a small-diameter extension spring manufactured from stainless steel for reliable tension performance in light-load applications. It measures 0.5 inches in outside diameter with a free length of 1.375 inches and a maximum extended length of 2.55 inches. The wire diameter is 0.045 inches, and the spring delivers a rate of 4.96 pounds per inch with a maximum work load of 6.52 pounds and an initial tension of 0.70 pounds. HVAC technicians, equipment assemblers, and mechanical service pros use this type of spring in controls, dampers, linkages, and light mechanical assemblies requiring consistent return force.

This extension spring suits residential and light commercial applications where a compact, corrosion-resistant tension element is needed. It is commonly installed in HVAC damper actuator linkages, control panel assemblies, and small mechanical devices where space is limited and reliable spring return is critical. The plain finish on the stainless steel body keeps installation straightforward without additional prep. Each package contains 3 pieces, making it practical for service stock or small batch replacements.

Key Features

• Stainless steel construction for corrosion resistance in humid or outdoor-adjacent environments
• Spring rate of 4.96 pounds per inch for predictable, linear load response
• Maximum work load of 6.52 pounds suits light-duty mechanical linkage applications
• Compact 0.5 inch outside diameter fits tight installation spaces
• Initial tension of 0.70 pounds keeps the spring closed under no-load conditions
• Packaged in quantities of 3 for efficient service stocking

Compatibility

Designed as an OEM-style replacement extension spring for light-duty mechanical and HVAC control linkage applications requiring a 0.5 inch outside diameter, 1.375 inch free length, and 4.96 lb/in spring rate.

Installation Notes

Installation is typically performed by HVAC technicians or mechanical service professionals. De-energize and lock out the equipment before removing or installing any spring components. Use appropriate spring hooks or needle-nose pliers to seat the hooks without overextending the spring beyond its 2.55 inch maximum extended length, as exceeding this value can permanently deform or damage the spring. Refer to the equipment manufacturer's service documentation for correct hook orientation and attachment points.