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5646CS - 6.25 Inch Spring Steel Extension Springs

The 5646CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and a zinc finish. This spring has a free length of 6.25 inches and an initial tension of 18.2 pounds. Made from spring steel, it has a maximum deflection of 2.5 inches and can handle a maximum load of 69 pounds. With an outside diameter of 0.875 inches and a wire diameter of 0.125 inches, the 5646CS has a spring rate of 21 inches per pound. It weighs 0.3621 pounds and is wound in a left direction. This standard extension spring is suitable for a variety of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of getting the springs you need quickly, which is why we offer reliable shipping options. With our significant stock, including the 5646CS, you can trust that we have the springs you need in our inventory. We are proud to manufacture our springs in the United States, ensuring high-quality and exceptional craftsmanship. Choose Century Spring for all your spring needs, and experience our commitment to customer satisfaction.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 18.2 lb
Length 6.25 in
Material Spring Steel
Outside Diameter 0.875 in
Part Type Standard
Rate 21 lbs/in
SKU 5646CS
Sugg Max Deflection 2.5 in
Sugg Max Load 69 lbf
Wind Direction Left
Wire Diameter 0.125 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 8.25 kg
Length 158.75 mm
Material Spring Steel
Outside Diameter 22.23 mm
Part Type Standard
Rate 3.68 N/mm
SKU 5646CS
Sugg Max Deflection 63.5 mm
Sugg Max Load 306.91 N
Wind Direction Left
Wire Diameter 3.18 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $7.32
50 - 149 $6.96
150 - 299 $6.59
300 - 499 $6.23
500 - 749 $5.49
750 - 999 $4.76
1000+ Call for price