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5645CS - 7.75 Inch Spring Steel Extension Springs

The 5645CS is a regular extension spring manufactured by Century Spring. It is made from spring steel with a zinc finish, providing durability and corrosion resistance. This spring has a free length of 7.75 inches and an initial tension of 14 pounds. Its maximum deflection is 5 inches, and it can handle a maximum load of 69 pounds. The 5645CS has an outside diameter of 1.219 inches and a wire diameter of 0.142 inches. With a spring rate of 11 inch-pounds, this extension spring is ideal for applications that require controlled extension and return.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of getting your springs quickly, which is why we offer efficient shipping options. Additionally, our significant stock inventory ensures that we have the springs you need readily available. As a company based in the United States, we are committed to manufacturing high-quality products, including the 5645CS, right here in our home country. With Century Spring, you can trust that you'll receive reliable and top-notch springs for your projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 14 lb
Length 7.75 in
Material Spring Steel
Outside Diameter 1.219 in
Part Type Standard
Rate 11 lbs/in
SKU 5645CS
Sugg Max Deflection 5 in
Sugg Max Load 69 lbf
Wind Direction Left
Wire Diameter 0.142 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 6.35 kg
Length 196.85 mm
Material Spring Steel
Outside Diameter 30.96 mm
Part Type Standard
Rate 1.93 N/mm
SKU 5645CS
Sugg Max Deflection 127 mm
Sugg Max Load 306.91 N
Wind Direction Left
Wire Diameter 3.61 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $12.82
50 - 149 $12.18
150 - 299 $11.54
300 - 499 $10.90
500 - 749 $9.62
750 - 999 $8.34
1000+ Call for price