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5621CS - 4.38 Inch Spring Steel Extension Springs

The 5621CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and features a zinc finish. This spring has a wire diameter of 0.035 inches, an outside diameter of 0.42 inches, and a free length of 4.38 inches. It has an initial tension of 0.4 Pound and a maximum deflection of 9.1 inches. The 5621CS has a maximum load capacity of 3.6 Pound Force and is designed with full loop ends. It is a reliable and durable spring suitable for a variety of applications.

At Century Spring, we pride ourselves on fast shipping and a significant stock inventory. We understand the importance of timely delivery, which is why we ensure that our products, including the 5621CS, are promptly shipped to our customers. Additionally, all of our springs are proudly made in the United States. With our commitment to quality and efficiency, Century Spring is the trusted choice for all your spring needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.4 lb
Length 4.38 in
Material Spring Steel
Outside Diameter 0.42 in
Part Type Standard
Rate 0.35 lbs/in
SKU 5621CS
Sugg Max Deflection 9.1 in
Sugg Max Load 3.6 lbf
Wind Direction Left
Wire Diameter 0.035 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.18 kg
Length 111.25 mm
Material Spring Steel
Outside Diameter 10.67 mm
Part Type Standard
Rate 0.06 N/mm
SKU 5621CS
Sugg Max Deflection 231.14 mm
Sugg Max Load 16.01 N
Wind Direction Left
Wire Diameter 0.89 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $3.48
50 - 149 $3.31
150 - 299 $3.14
300 - 499 $2.96
500 - 749 $2.61
750 - 999 $2.27
1000+ Call for price