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4403CS - 18 Inch Spring Steel Extension Springs

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

The 4403CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and is finished with zinc for enhanced durability. This spring has a free length of 18 inches and an initial tension of 16 pounds. Made from spring steel, it has a maximum deflection of 15 inches and can withstand a maximum load of 85 pound force. With an outside diameter of 1.5 inches and a wire diameter of 0.165 inches, the 4403CS has a spring rate of 4.7 inches per pound. It is shipped with a weight of 2.6141 pounds. Suitable for a range of applications, this extension spring is a reliable choice.

Century Spring takes pride in offering fast shipping and maintaining a significant stock inventory. As a U.S. manufacturer, we ensure that our products, including the 4403CS, are made to the highest standards. With our efficient shipping services and ample supply, Century Spring guarantees that customers can quickly receive 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 16 lb
Length 18 in
Material Spring Steel
Outside Diameter 1.5 in
Part Type Standard
Rate 4.7 lbs/in
SKU 4403CS
Sugg Max Deflection 15 in
Sugg Max Load 85 lbf
Wind Direction Left
Wire Diameter 0.165 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 7.26 kg
Length 457.2 mm
Material Spring Steel
Outside Diameter 38.1 mm
Part Type Standard
Rate 0.82 N/mm
SKU 4403CS
Sugg Max Deflection 381 mm
Sugg Max Load 378.08 N
Wind Direction Left
Wire Diameter 4.19 mm