Gardner Spring E28C Extension Spring 0.375in Od 3.79lb

Product Description

The GARDNER SPRING E28C is a steel extension spring engineered for light-duty tensile applications across HVAC, industrial, and mechanical assemblies. It features a 0.375-inch outside diameter, a wire diameter of 0.0348 inches, and a spring rate of 3.82 pounds per inch. The crossover end style allows straightforward hook engagement in standard mounting configurations. At a maximum work load of 3.79 pounds and a maximum extended length of 2.07 inches, this spring is sized for compact mechanisms where consistent return force and dimensional precision are critical. Installation is typically performed by HVAC technicians, mechanical assemblers, or maintenance professionals working with tensioned linkage systems.

This extension spring suits residential and light commercial applications including HVAC damper linkages, control arm assemblies, door return mechanisms, and general tensioning hardware. Its zinc-plated finish provides corrosion resistance for installations in moderately humid environments such as mechanical rooms, rooftop units, and air handling equipment. The overall free length of 1.25 inches keeps the footprint small, making it compatible with tight equipment cavities common in packaged HVAC units and similar trade equipment.

Key Features

• Crossover end style for standard hook and loop mounting engagement
• 0.375-inch outside diameter fits compact spring pockets and brackets
• 3.82 lb/in spring rate delivers consistent, predictable tensile return force
• Zinc-plated steel finish resists corrosion in humid mechanical environments
• Maximum extended length of 2.07 inches suits short-travel tensioning applications
• Sold in a package of 12 pieces for service stock and repeat-replacement needs

Compatibility

Designed as an OEM-style replacement extension spring for light-duty tensile applications in HVAC equipment, mechanical assemblies, and industrial hardware requiring a 0.375-inch OD crossover-end spring.

Installation Notes

Extension springs store energy under tension and should be installed and removed with appropriate hand tools to prevent sudden release. De-energize or lock out any mechanical or electrical actuator connected to the spring linkage before service, following applicable LOTO procedures. Inspect the mounting hooks and anchor points for wear or deformation before installing the replacement spring. Verify the spring rate and extended length match the original specification before finalizing the assembly.