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78CS - 3.50 Inch High Carbon Steel Extension Springs

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

The 78CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and a zinc finish. With a free length of 3.5 inches and a wire diameter of 0.091 inches, this spring is made from High Carbon steel. It has an initial tension of 4 pounds and a maximum deflection of 2.8 inches. The 78CS has a maximum load capacity of 26 pounds force and a spring rate of 7.7 lbs/inch. Its outside diameter measures 0.875 inches. This standard measurement unit spring is known for its reliability and versatility.

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 quick turnaround times. Additionally, our products, including the 78CS, are proudly made in the United States. With our commitment to quality and availability, Century Spring is your trusted source for springs that meet your specific needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 4 lb
Length 3.5 in
Material High Carbon Steel
Outside Diameter 0.875 in
Part Type Standard
Rate 7.7 lbs/in
SKU 78CS
Sugg Max Deflection 2.8 in
Sugg Max Load 26 lbf
Wind Direction Left
Wire Diameter 0.091 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 1.81 kg
Length 88.9 mm
Material High Carbon Steel
Outside Diameter 22.23 mm
Part Type Standard
Rate 1.35 N/mm
SKU 78CS
Sugg Max Deflection 71.12 mm
Sugg Max Load 115.65 N
Wind Direction Left
Wire Diameter 2.31 mm