This browser is no longer supported. Upgrade to Microsoft Edge or switch to a supported browser, like Chrome, Safari, or Firefox, to explore the MW Components website.

We're sorry for the inconvenience.

421CS - 0.88 Inch Music Wire Extension Springs

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

The 421CS 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 wire diameter of 0.02 inches and an outside diameter of 0.25 inches. It has a free length of 0.88 inches and an initial tension of 0.14 pounds. With a maximum deflection of 1.9 inches and a maximum load of 1.7 pounds force, the 421CS is a reliable and versatile spring. It has full loop ends and a spring rate of 0.82 inches per pound. This standard-sized extension spring is perfect for various applications.

At Century Spring, we understand the importance of fast shipping and maintaining a significant stock inventory. We take pride in manufacturing our springs in the United States, ensuring high-quality products for our customers. With our efficient shipping processes and ample supply, Century Spring ensures that you can receive the 421CS and other springs quickly to meet your project needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.14 lb
Length 0.88 in
Material Music Wire
Outside Diameter 0.25 in
Part Type Standard
Rate 0.82 lbs/in
SKU 421CS
Sugg Max Deflection 1.9 in
Sugg Max Load 1.7 lbf
Wind Direction Left
Wire Diameter 0.02 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.06 kg
Length 22.35 mm
Material Music Wire
Outside Diameter 6.35 mm
Part Type Standard
Rate 0.14 N/mm
SKU 421CS
Sugg Max Deflection 48.26 mm
Sugg Max Load 7.56 N
Wind Direction Left
Wire Diameter 0.51 mm