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5657CS - 3.75 Inch Spring Steel Extension Springs

The 5657CS is a regular extension spring manufactured by Century Spring. It features a machine hook on both ends and has a zinc finish for added durability. This spring has a free length of 3.75 inches and an initial tension of 7 pounds. Made from high-quality spring steel, it has a maximum deflection of 2.1 inches and can handle a maximum load of 32 pound force. With an outside diameter of 0.734 inches and a wire diameter of 0.091 inches, the 5657CS offers a spring rate of 12 inches per pound. It is a left-wound spring and is suitable for various applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we ensure that our products are promptly shipped to our customers. Additionally, our commitment to maintaining a significant stock inventory means that you can rely on us to have the springs you need readily available. We are proud to say that all our springs, including the 5657CS, are made in the United States. With Century Spring, you can count on quality products, fast shipping, and excellent customer service.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 7 lb
Length 3.75 in
Material Spring Steel
Outside Diameter 0.734 in
Part Type Standard
Rate 12 lbs/in
SKU 5657CS
Sugg Max Deflection 2.1 in
Sugg Max Load 32 lbf
Wind Direction Left
Wire Diameter 0.091 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 3.17 kg
Length 95.25 mm
Material Spring Steel
Outside Diameter 18.64 mm
Part Type Standard
Rate 2.1 N/mm
SKU 5657CS
Sugg Max Deflection 53.34 mm
Sugg Max Load 142.34 N
Wind Direction Left
Wire Diameter 2.31 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $4.57
50 - 149 $4.35
150 - 299 $4.12
300 - 499 $3.89
500 - 749 $3.43
750 - 999 $2.98
1000+ Call for price