Gardner Spring V21C Extension Spring 26.38 Lb Max Load

Product Description

The GARDNER SPRING V21C is a galvanized steel extension spring designed to store and release energy under tensile load in mechanical assemblies and industrial equipment. It features a 0.64 inch outside diameter, a wire diameter of 0.08 inches, and a spring rate of 4.28 pounds per inch. The free length is 6.0 inches, and the spring extends to a maximum of 9.28 inches under a maximum work load of 26.38 pounds. An initial tension of 6.9 pounds must be overcome before deflection begins. This spring is intended for installation by maintenance technicians, millwrights, or mechanical tradespeople working on tension-loaded mechanisms.

The V21C extension spring is suited for use in residential and light commercial applications where a compact, zinc-plated steel spring is required to resist corrosion and provide consistent return force. Typical install scenarios include garage door assemblies, HVAC equipment linkages, industrial machinery, and general mechanical tensioning applications. Each package contains 3 pieces, making it practical for service calls requiring on-hand spares or batch replacements in multi-unit equipment.

Key Features

• Maximum work load of 26.38 pounds with a spring rate of 4.28 lb/in for predictable deflection behavior
• Free length of 6.0 inches extends to a maximum of 9.28 inches under full load
• Initial tension of 6.9 pounds provides preload to prevent coil separation at rest
• Galvanized and zinc-plated steel construction for corrosion resistance in damp or outdoor-adjacent environments
• 0.64 inch outside diameter and 0.08 inch wire size suit compact mounting spaces
• Sold in a 3-piece package to support stocking and batch replacement workflows

Compatibility

Designed as an OEM-style replacement extension spring for mechanical tensioning applications requiring a 0.64 inch OD, 6.0 inch free length, galvanized steel spring with a 4.28 lb/in spring rate.

Installation Notes

Extension springs store energy under tension and must be handled with care during removal and installation to prevent snap-back injury. Relieve all tension from the mechanism before disconnecting the spring, and use appropriate hooks or tooling rated for the load. Verify the replacement spring free length, outside diameter, and spring rate match the application requirements before installing. This work is typically performed by maintenance technicians or mechanical tradespeople familiar with tension-loaded assemblies.