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5009CS - 12 Inch Spring Steel Extension Springs

The 5009CS is a regular extension spring manufactured by Century Spring. It features a zinc finish and is made from durable spring steel. This spring has a free length of 12 inches and an initial tension of 6 pounds. With an outside diameter of 1.062 inches and a wire diameter of 0.11 inches, it has a maximum deflection of 12 inches and a maximum load of 37 pound force. The 5009CS has a spring rate of 2.6 inches per pound and is left-wound. It is equipped with machine hooks on both ends, making it easy to install and secure. Whether you need it for industrial equipment or automotive applications, the 5009CS is a reliable extension spring that provides the necessary strength and flexibility.

At Century Spring, we prioritize fast shipping and maintain a significant stock inventory. We understand the importance of timely delivery for your projects, which is why we work diligently to process and ship orders as quickly as possible. Our extensive stock ensures that you can find the springs you need without delays. Additionally, all our springs, including the 5009CS, are proudly made in the United States. We take pride in our high-quality manufacturing processes and materials, ensuring that our products meet the highest standards. Trust Century Spring for your spring needs, and experience our commitment to fast shipping, ample stock, and American-made excellence.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 6 lb
Length 12 in
Material Spring Steel
Outside Diameter 1.062 in
Part Type Standard
Rate 2.6 lbs/in
SKU 5009CS
Sugg Max Deflection 12 in
Sugg Max Load 37 lbf
Wind Direction Left
Wire Diameter 0.11 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.72 kg
Length 304.8 mm
Material Spring Steel
Outside Diameter 26.97 mm
Part Type Standard
Rate 0.46 N/mm
SKU 5009CS
Sugg Max Deflection 304.8 mm
Sugg Max Load 164.58 N
Wind Direction Left
Wire Diameter 2.79 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $14.08
50 - 149 $13.38
150 - 299 $12.68
300 - 499 $11.97
500 - 749 $10.56
750 - 999 $9.16
1000+ Call for price