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5618CS - 4 Inch Spring Steel Extension Springs

The 5618CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and has a zinc finish. This spring has a wire diameter of 0.041 inches, an outside diameter of 0.5 inches, and a free length of 4 inches. It has an initial tension of 0.5 Pound and a maximum deflection of 8.4 inches. The 5618CS has a rate of 0.51 inches per pound and can withstand a maximum load of 4.8 Pound Force. It features machine hook ends and is suitable for various applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery and strive to ensure that our customers receive their springs promptly. Additionally, all our products, including the 5618CS, are proudly made in the United States. This commitment to quality and efficiency allows us to provide reliable and high-quality springs for all your needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.5 lb
Length 4 in
Material Spring Steel
Outside Diameter 0.5 in
Part Type Standard
Rate 0.51 lbs/in
SKU 5618CS
Sugg Max Deflection 8.4 in
Sugg Max Load 4.8 lbf
Wind Direction Left
Wire Diameter 0.041 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.23 kg
Length 101.6 mm
Material Spring Steel
Outside Diameter 12.7 mm
Part Type Standard
Rate 0.09 N/mm
SKU 5618CS
Sugg Max Deflection 213.36 mm
Sugg Max Load 21.35 N
Wind Direction Left
Wire Diameter 1.04 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $3.99
50 - 149 $3.80
150 - 299 $3.60
300 - 499 $3.40
500 - 749 $3.00
750 - 999 $2.60
1000+ Call for price