Gardner Spring 37091G Extension Spring 20.7 Lb 0.75 in Od

Product Description

The GARDNER SPRING 37091G is a zinc-plated extension spring designed for applications requiring controlled tensile force across a range of mechanical assemblies. With a 0.75-inch outside diameter and a 0.075-inch wire diameter, this spring delivers a spring rate of 6.7 pounds per inch and a maximum work load of 20.7 pounds. The free length measures 3.0 inches, and the spring extends to a maximum of 5.79 inches under load. An initial tension of 2.0 pounds keeps the coils closed before the load threshold is reached. This spring is typically installed by maintenance technicians, mechanical contractors, and equipment service professionals working on light-to-medium-duty mechanical systems.

This extension spring suits residential and commercial mechanical applications where a compact, moderate-load tensile spring is required. Common installation scenarios include equipment panels, door assemblies, linkages, and machine guards where a consistent return force is needed. The zinc plating provides corrosion resistance suitable for indoor and protected outdoor environments. Each package contains 3 pieces, making it practical for service calls or bench stock replenishment.

Key Features

• Spring rate of 6.7 pounds per inch for predictable, linear load response
• Maximum work load of 20.7 pounds with an initial tension of 2.0 pounds
• Zinc-plated finish for corrosion resistance in protected environments
• 0.75-inch outside diameter and 0.075-inch wire diameter for compact fitment
• Extends from a 3.0-inch free length to a maximum of 5.79 inches
• Sold in a package of 3 pieces, suitable for stocking or multi-unit service

Compatibility

Designed as an OEM-style replacement or service stock extension spring for light-to-medium-duty mechanical assemblies requiring a 0.75-inch OD spring with a 6.7 pounds-per-inch spring rate and a 20.7-pound maximum load rating.

Installation Notes

Installation is typically performed by qualified mechanical or HVAC service technicians. De-energize and lock out all equipment before removing or installing tension springs to prevent unexpected movement. Use appropriate spring installation tools to seat hooks securely and avoid overextending the spring beyond its maximum extended length of 5.79 inches, which can cause permanent set or failure. Inspect hook ends and mating attachment points for wear or deformation before reinstalling.