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5821CS - 5 Inch Music Wire Extension Springs

The 5821CS is a regular extension spring manufactured by Century Spring. It is made from high-quality music wire and features a durable zinc finish. This spring has a free length of 5 inches and an initial tension of 0.5 pounds. With a maximum deflection of 11 inches and a maximum load capacity of 5.4 pounds, the 5821CS is a reliable and versatile extension spring. It has an outside diameter of 0.375 inches and a wire diameter of 0.035 inches. The spring rate is 0.43 inch-pounds, providing the necessary flexibility and strength for various applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we ensure that our customers receive their springs quickly. With our significant stock, we can fulfill orders promptly, eliminating unnecessary delays. Additionally, all our springs, including the 5821CS, are proudly made in the United States. We prioritize quality and craftsmanship in our manufacturing process, guaranteeing reliable and durable springs for our customers' projects. Trust Century Spring to provide the springs you need, efficiently and with the highest standard of excellence.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.5 lb
Length 5 in
Material Music Wire
Outside Diameter 0.375 in
Part Type Standard
Rate 0.43 lbs/in
SKU 5821CS
Sugg Max Deflection 11 in
Sugg Max Load 5.4 lbf
Wind Direction Left
Wire Diameter 0.035 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.23 kg
Length 127 mm
Material Music Wire
Outside Diameter 9.53 mm
Part Type Standard
Rate 0.08 N/mm
SKU 5821CS
Sugg Max Deflection 279.4 mm
Sugg Max Load 24.02 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 $4.07
50 - 149 $3.87
150 - 299 $3.67
300 - 499 $3.46
500 - 749 $3.06
750 - 999 $2.65
1000+ Call for price