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618CS - 12 Inch High Carbon Steel Extension Springs

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

The 618CS is a regular extension spring manufactured by Century Spring. It features a double loop design at both ends, providing secure attachments. This spring is made from High Carbon steel and has a zinc finish, ensuring durability and resistance to corrosion. With a free length of 12 inches and an initial tension of 23 pounds, the 618CS offers reliable extension capabilities. It has a maximum deflection of 6.2 inches and can withstand a maximum load of 100 pound force. The spring has an outside diameter of 1.25 inches and a wire diameter of 0.162 inches. With a spring rate of 12 lbs/inch, the 618CS is suitable for various extension spring applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the urgency of your projects and strive to deliver your springs promptly. Additionally, all our products, including the 618CS, are proudly made in the United States. You can trust Century Spring for high-quality springs and reliable service. With our vast inventory and efficient shipping, you can count on us to provide the springs you need, when you need them.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Double Loop
Finish Zinc
Initial Tension 23 lb
Length 12 in
Material High Carbon Steel
Outside Diameter 1.25 in
Part Type Standard
Rate 12 lbs/in
SKU 618CS
Sugg Max Deflection 6.2 in
Sugg Max Load 100 lbf
Wind Direction Left
Wire Diameter 0.162 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Double Loop
Finish Zinc
Initial Tension 10.43 kg
Length 304.8 mm
Material High Carbon Steel
Outside Diameter 31.75 mm
Part Type Standard
Rate 2.1 N/mm
SKU 618CS
Sugg Max Deflection 157.48 mm
Sugg Max Load 444.8 N
Wind Direction Left
Wire Diameter 4.11 mm