Gardner Spring 634C Extension Spring 0.675 in Od 5.01 Lb

Product Description

The GARDNER SPRING 634C is a galvanized steel extension spring rated for a maximum work load of 5.01 pounds and a spring rate of 2.28 lb/in. At 0.675 inches outside diameter, 0.048 inches wire diameter, and 4.0 inches overall length, this is a compact, light-duty tension spring suited for mechanical assemblies, HVAC damper linkages, access panels, and similar applications requiring controlled return force. The zinc-plated galvanized finish provides basic corrosion resistance for use in covered or semi-exposed environments. Installation is straightforward and requires no special tooling beyond standard hand tools. This part ships as a set of 3 pieces per package.

The 634C is commonly used in light mechanical and HVAC service applications where a small-diameter, moderate-load extension spring is needed. Typical uses include damper blade return mechanisms, door latch assemblies, light equipment guards, and control linkages in residential and light commercial HVAC equipment. Its compact 4.0-inch length and 0.675-inch OD allow it to fit in tight mounting arrangements common in sheet-metal enclosures and control panels. HVAC technicians, mechanical contractors, and maintenance professionals are the primary installers.

Key Features

• 5.01 lb maximum work load for light-duty tension applications
• 2.28 lb/in spring rate for predictable, consistent return force
• 0.675 inches outside diameter fits tight clearance mounting points
• Galvanized zinc-plated steel construction for corrosion resistance
• 4.0 inches overall length suits compact mechanical assemblies
• Sold as a 3-piece set per package

Compatibility

Designed as a standard light-duty extension spring for use in mechanical assemblies, HVAC linkages, and similar applications requiring a 0.675-inch OD spring with a 5.01 lb load rating and 2.28 lb/in spring rate.

Installation Notes

Extension springs store energy under tension - always de-energize or disengage the mechanism before removing or installing the spring to avoid sudden release. Use appropriate hand tools and eye protection when stretching or seating the spring on its hooks or anchors. Verify the installed length and hook engagement before returning the assembly to service. Follow applicable equipment manufacturer guidelines for spring replacement procedures.