Gardner Spring V7C Extension Spring 12 Lb 0.43 in Od

Product Description

The GARDNER SPRING V7C is a galvanized steel extension spring rated for a maximum work load of 12 pounds and a spring rate of 3.83 lb/in. It features a 0.43-inch outside diameter, a 0.054-inch wire diameter, and a free length of 4 inches, extending to a maximum of 6.34 inches under load. An initial tension of 1.4 pounds keeps coils closed at rest. The zinc-plated galvanized finish resists corrosion in light-exposure environments. This part is installed by HVAC technicians, plumbers, electricians, and mechanical contractors in applications requiring reliable return-force tension across a defined extension range.

The V7C extension spring suits residential and light commercial mechanical assemblies where a controlled extension force is needed. Typical applications include HVAC damper linkages, door and access panel return mechanisms, small equipment latching assemblies, and general industrial tensioning setups. The 4-inch free length and 12-pound load rating make it appropriate for compact installations with moderate force requirements. Each package contains 6 pieces, allowing for on-hand replacement stock for recurring service needs.

Key Features

• 12-pound maximum work load with a 3.83 lb/in spring rate for predictable force behavior
• Extends from a 4-inch free length to a maximum of 6.34 inches
• 0.43-inch outside diameter and 0.054-inch wire diameter for compact fitment
• 1.4-pound initial tension holds coils closed without external load
• Galvanized zinc-plated steel finish for corrosion resistance in light-duty environments
• Sold in a package of 6 pieces to support replacement inventory

Compatibility

Designed as a general-purpose extension spring for use in HVAC, plumbing, electrical, and light mechanical assemblies requiring a 0.43-inch OD spring with a 12-pound maximum load rating and a 4-inch free length.

Installation Notes

Installation should be performed by a qualified technician familiar with mechanical spring assemblies and the system being serviced. Power down or de-energize the associated equipment before removing or installing springs to prevent unexpected actuation. Use appropriate hand tools and eye protection when stretching or seating extension springs, as stored energy can cause injury if a spring slips. Verify that hooks or end loops are fully engaged with mounting points before returning the assembly to service.