Gardner Spring E33C Extension Spring 3.81 Lb Max Load

Product Description

The GARDNER SPRING E33C is a zinc-plated steel extension spring designed for light-duty tensioning applications across HVAC, plumbing, electrical, and general mechanical systems. It features a cross-over end style, an outside diameter of 0.375 inches, and a wire diameter of 0.0348 inches. The spring rate is 1.05 pounds per inch, with a maximum work load of 3.81 pounds. At rest, the overall length is 2.5 inches; under load it extends to a maximum of 5.52 inches. Sold in a package of three, this spring is well suited for service technicians who need a reliable replacement or spare on hand during field repairs.

This extension spring fits light mechanical assemblies typical in residential and commercial HVAC equipment, control linkages, access panels, damper assemblies, and similar tensioning points. Its compact outside diameter and modest spring rate make it a practical fit wherever a small-profile, low-force return spring is required. The cross-over end style allows for straightforward hook engagement in standard spring-retention slots and tabs commonly found on sheet metal assemblies and mechanical components.

Key Features

• Cross-over end style for easy hook engagement in standard retention slots
• Outside diameter of 0.375 inches suits compact mounting locations
• Spring rate of 1.05 lb/in provides consistent, predictable tensioning force
• Maximum extended length of 5.52 inches with a maximum work load of 3.81 pounds
• Zinc-plated steel construction resists corrosion in typical mechanical enclosures
• Sold in a package of three, minimizing repeat sourcing trips

Compatibility

Designed as an OEM-style replacement extension spring for light-duty mechanical tensioning applications in residential and commercial equipment assemblies.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or mechanical service professionals during equipment repair or preventive maintenance. Power down or de-energize any equipment before replacing springs on control linkages, damper actuators, or panel assemblies. Use appropriate hand tools and eye protection when stretching or seating extension springs under tension. Verify the replacement spring rate, outside diameter, and end style match the original before completing reassembly.