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5659CS - 8 Inch Spring Steel Extension Springs

Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours

The 5659CS is an extension spring manufactured by Century Spring. It features machine hook ends and is finished with zinc for durability. This spring has a free length of 8 inches and an initial tension of 4.6 pounds. Made from spring steel, it can handle a maximum deflection of 5.4 inches and a maximum load of 21 pounds force. With an outside diameter of 0.578 inches and a wire diameter of 0.072 inches, the 5659CS has a spring rate of 3.1 lbs/inch. It is a left-wind spring and conforms to standard measurement units.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. Our products, including the 5659CS, are proudly made in the United States. With our efficient shipping services and ample supply, we ensure that customers have easy access to the springs they need for their projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 4.6 lb
Length 8 in
Material Spring Steel
Outside Diameter 0.578 in
Part Type Standard
Rate 3.1 lbs/in
SKU 5659CS
Sugg Max Deflection 5.4 in
Sugg Max Load 21 lbf
Wind Direction Left
Wire Diameter 0.072 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.09 kg
Length 203.2 mm
Material Spring Steel
Outside Diameter 14.68 mm
Part Type Standard
Rate 0.54 N/mm
SKU 5659CS
Sugg Max Deflection 137.16 mm
Sugg Max Load 93.41 N
Wind Direction Left
Wire Diameter 1.83 mm