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The CENTURY SPRING C-239 is a standard extension spring sold in a 2-count pack, designed to resist a pulling force and return to a tightly wound coil once that force is released. With an outside diameter of 0.375 inches and a body length of 6.5 inches, this spring delivers consistent tension performance in mechanical assemblies, equipment enclosures, and light industrial applications. It is a utility hardware component installed by HVAC technicians, maintenance mechanics, and general tradespeople wherever a reliable return-tension spring is required.
Extension springs like the C-239 are commonly used in residential and light commercial equipment where a component must be held under tension and automatically retract when load is removed. Typical applications include HVAC access panels, damper linkages, equipment latches, and similar mechanical assemblies that require a compact, coiled tension element. The 2-count pack suits service calls where a spare is practical to have on hand.
Designed as a general-purpose replacement extension spring suited for residential and light commercial mechanical assemblies requiring a 6.5-inch by 0.375-inch outside diameter coil tension spring.
Extension springs are installed by HVAC technicians, maintenance mechanics, and general tradespeople. Always de-energize and lock out the equipment before removing or installing springs, as stored mechanical energy can cause injury during service. Ensure the replacement spring matches the original outside diameter and length specifications before installation. Use appropriate hand tools and safety glasses when working with tension springs.
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