Gardner Spring 37057G Extension Spring 3/8 in Od 17.5 Lb

Product Description

The GARDNER SPRING 37057G is a zinc-plated extension spring engineered for light-duty tensioning applications across HVAC, mechanical, and general trade assemblies. It features a 3/8 inch (0.375 inch) outside diameter, a wire diameter of 0.055 inches, and a spring rate of 34.8 pounds per inch. The free length is 1.25 inches, with a maximum extended length of 1.7 inches and a maximum work load of 17.5 pounds. The zinc-plated finish provides corrosion resistance in moderate-exposure environments. Sold in a package of 6 pieces, this spring suits applications where consistent return tension and compact form factor are required.

This extension spring is used in residential and light commercial mechanical assemblies where controlled tensioning is needed. Typical applications include HVAC damper linkages, control panel assemblies, door or panel latching mechanisms, and other equipment requiring a small-diameter, low-load return spring. The compact 1.25 inch free length makes it suitable for space-constrained installations. Technicians working on HVAC equipment, mechanical controls, or general trade hardware will find this spring a reliable drop-in component for both OEM service and custom assembly work.

Key Features

• Outside diameter of 0.375 inches suits tight clearance mounting locations
• Spring rate of 34.8 pounds per inch provides predictable, linear extension force
• Maximum work load of 17.5 pounds with an initial tension of 2.0 pounds
• Maximum extended length of 1.7 inches from a 1.25 inch free length
• Zinc-plated finish resists corrosion in moderate service environments
• Packaged in quantities of 6 to support service inventory and bench stock

Compatibility

Designed as a standard extension spring suitable for light-duty tensioning applications in HVAC, mechanical, and general trade equipment requiring a 3/8 inch OD, 0.055 inch wire diameter spring with a 34.8 pound-per-inch spring rate.

Installation Notes

Extension springs should be installed by qualified technicians familiar with the equipment being serviced. Before replacing a spring, de-energize or lock out the system per applicable OSHA and equipment manufacturer lockout-tagout procedures. Verify the replacement spring matches the required OD, wire diameter, free length, and spring rate of the original component before installation. Do not stretch the spring beyond its maximum extended length of 1.7 inches during handling or installation.