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728CS - 12 Inch High Carbon Steel Extension Springs

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

The 728CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and is finished with zinc for added durability. With a free length of 12 inches, this spring has an initial tension of 15 pounds. Made from High Carbon steel, it has a maximum deflection of 7.1 inches and can handle a maximum load of 69 pounds. The 728CS has an outside diameter of 1.062 inches and a wire diameter of 0.135 inches. Its rate is 7.7 lbs/inch, making it suitable for a variety of applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery for your projects. Rest assured, our products, including the 728CS, are made right here in the United States. With our reliable shipping and abundant supply, Century Spring ensures that you can get the springs you need quickly and efficiently.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 15 lb
Length 12 in
Material High Carbon Steel
Outside Diameter 1.062 in
Part Type Standard
Rate 7.7 lbs/in
SKU 728CS
Sugg Max Deflection 7.1 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 6.8 kg
Length 304.8 mm
Material High Carbon Steel
Outside Diameter 26.97 mm
Part Type Standard
Rate 1.35 N/mm
SKU 728CS
Sugg Max Deflection 180.34 mm
Sugg Max Load 306.91 N
Wind Direction Left
Wire Diameter 3.43 mm