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371CS - 5 Inch High Carbon Steel Extension Springs

The 371CS is a regular extension spring manufactured by Century Spring. It is made from High Carbon steel and features a zinc finish for added durability. This spring has a free length of 5 inches and an initial tension of 17 pounds. It has a maximum deflection of 2.4 inches and can withstand a maximum load of 69 pound force. With an outside diameter of 1.062 inches and a wire diameter of 0.135 inches, this spring has a rate of 22 inches per pound. The 371CS is equipped with machine hooks on both ends, making it easy to attach and use. This standard extension spring is ideal for a wide range of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand that time is of the essence when it comes to completing your projects, which is why we strive to deliver our springs promptly. Additionally, all of our products, including the 371CS, are proudly made in the United States. By manufacturing locally, we ensure the highest quality standards and support the domestic economy. Count on us to provide you with the springs you need, when you need them.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 17 lb
Length 5 in
Material High Carbon Steel
Outside Diameter 1.062 in
Part Type Standard
Rate 23.5 lbs/in
SKU 371CS
Sugg Max Deflection 2.4 in
Sugg Max Load 69 lbf
Wind Direction Left
Wire Diameter 0.135 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 7.71 kg
Length 127 mm
Material High Carbon Steel
Outside Diameter 26.97 mm
Part Type Standard
Rate 4.11 N/mm
SKU 371CS
Sugg Max Deflection 60.96 mm
Sugg Max Load 306.91 N
Wind Direction Left
Wire Diameter 3.43 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $7.74
50 - 149 $7.36
150 - 299 $6.97
300 - 499 $6.58
500 - 749 $5.81
750 - 999 $5.04
1000+ Call for price