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5904CS - 4.25 Inch Spring Steel Extension Springs

The 5904CS 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 0.085 inches, an outside diameter of 0.843 inches, and a free length of 4.25 Inches. It has an initial tension of 4 Pound and a maximum deflection of 4.4 Inches. The 5904CS has a spring rate of 4.4 inches per pound and a maximum load of 23 Pound Force. It features full loop ends, providing secure attachment points. The 5904CS is a reliable extension spring suitable for a variety of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. Our products, including the 5904CS, are proudly made in the United States. With our efficient shipping process and ample supply, Century Spring ensures that customers can quickly receive the high-quality springs they need for their projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 4 lb
Length 4.25 in
Material Spring Steel
Outside Diameter 0.843 in
Part Type Standard
Rate 4.4 lbs/in
SKU 5904CS
Sugg Max Deflection 4.4 in
Sugg Max Load 23 lbf
Wind Direction Left
Wire Diameter 0.085 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 1.81 kg
Length 107.95 mm
Material Spring Steel
Outside Diameter 21.41 mm
Part Type Standard
Rate 0.77 N/mm
SKU 5904CS
Sugg Max Deflection 111.76 mm
Sugg Max Load 102.3 N
Wind Direction Left
Wire Diameter 2.16 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $5.06
50 - 149 $4.81
150 - 299 $4.56
300 - 499 $4.31
500 - 749 $3.80
750 - 999 $3.29
1000+ Call for price