Gardner Spring E40C-SS Extension Spring 0.375 in Od

Product Description

The GARDNER SPRING E40C-SS is a stainless steel extension spring engineered for consistent tensile force across a defined travel range. With an outside diameter of 0.375 inches, a wire diameter of 0.0475 inches, and a spring rate of 4.86 lb/in, this spring delivers controlled resistance through its full extension cycle. It has an overall free length of 2.5 inches and extends to a maximum of 4.07 inches under a maximum working load of 10.03 lb. Sold in a package of 3 pieces, it suits applications where consistent restoring force and compact form factor are both required. Mechanical maintenance technicians, OEM assemblers, and industrial service professionals are the typical installers.

This extension spring is suited for light-duty mechanical assemblies where a compact, precise tensile element is needed. Typical applications include HVAC damper linkages, control panel mechanisms, door latches, and general industrial equipment where repeated extension and return cycles occur. Its small diameter and moderate load capacity make it a practical fit for space-constrained assemblies in both residential and light commercial settings. The package quantity of 3 supports service inventory or multi-point installations on the same piece of equipment.

Key Features

• 0.375 inch outside diameter suits compact mechanical assemblies
• 4.86 lb/in spring rate provides predictable, linear restoring force
• Maximum extended length of 4.07 inches from a 2.5 inch free length
• 10.03 lb maximum working load rated by the manufacturer
• 0.0475 inch wire diameter for fine-pitch, low-profile spring construction
• Sold in a quantity of 3 pieces per package

Compatibility

Designed as an OEM-style replacement or service stock extension spring for light mechanical assemblies requiring a 0.375 inch OD tensile spring with a 4.86 lb/in spring rate.

Installation Notes

Extension springs store energy under tension and should always be installed and removed with appropriate hand tools and eye protection, as sudden release can cause injury. Verify that the mounting hooks or loop ends are fully engaged on both anchor points before loading the spring. Do not exceed the rated maximum working load of 10.03 lb, as overextension can permanently deform the spring or cause failure. A licensed mechanic or qualified technician should assess the surrounding assembly for wear before installing replacement springs.