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318CS - 2.63 Inch High Carbon Steel Extension Springs

The 318CS is a regular extension spring manufactured by Century Spring. It has a free length of 2.63 inches and is made of High Carbon steel. The spring has a maximum deflection of 0.87 inches and can handle a maximum load of 50 pounds of force. With a wire diameter of 0.105 inches and an outside diameter of 0.734 inches, this spring has a rate of 44 inches per pound. It features machine hook ends and a left wind direction. The 318CS is a reliable and sturdy extension spring 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 and ensure that our customers receive their springs quickly. Additionally, all our products, including the 318CS, are proudly made in the United States. With our reliable shipping and ample supply, Century Spring is committed to providing customers with the springs they need for their projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 12 lb
Length 2.63 in
Material High Carbon Steel
Outside Diameter 0.734 in
Part Type Standard
Rate 44 lbs/in
SKU 318CS
Sugg Max Deflection 0.87 in
Sugg Max Load 50 lbf
Wind Direction Left
Wire Diameter 0.105 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 5.44 kg
Length 66.8 mm
Material High Carbon Steel
Outside Diameter 18.64 mm
Part Type Standard
Rate 7.7 N/mm
SKU 318CS
Sugg Max Deflection 22.1 mm
Sugg Max Load 222.4 N
Wind Direction Left
Wire Diameter 2.67 mm
Inventory Status
Low Stock
Quantity Price
1 - 49 $3.13
50 - 149 $2.98
150 - 299 $2.82
300 - 499 $2.67
500 - 749 $2.35
750 - 999 $2.04
1000+ Call for price