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FF-21CS - 0.13 Inch Music Wire Compression Springs

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The FF-21CS is a regular compression spring manufactured by Century Spring. It is made from Music Wire and has a natural finish. This spring has a wire diameter of 0.007 inches, an outer diameter of 0.062 inches, and a free length of 0.13 inches. It features a closed-end design, meaning the ends are squared. The FF-21CS has a spring rate of 4.1 lbs/inch and a maximum load of 0.29 Pound Force. With a total of 7 coils and a solid length of 0.06 inches, this standard compression spring is suitable for a variety of applications.

At Century Spring, we pride ourselves on fast shipping and maintaining a significant stock inventory. Our products, including the FF-21CS, are made in the United States. With our efficient shipping process and ample supply, we ensure that our customers receive the springs they need promptly. Whether you're working on a small project or a large-scale production, you can rely on Century Spring for high-quality springs and reliable service.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Closed
Finish None
Free Length 0.13 in
Inside Diameter 0.048 in
Material Music Wire
Outside Diameter 0.062 in
Part Type Standard
Rate 4.1 lbs/in
SKU FF-21CS
Solid Length 0.06 in
Suggested Max Deflection 0.07 in
Suggested Max Load 0.29 lbf
Total Coils 7
Wire Diameter 0.007 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Closed
Finish None
Free Length 3.3 mm
Inside Diameter 1.22 mm
Material Music Wire
Outside Diameter 1.57 mm
Part Type Standard
Rate 0.72 N/mm
SKU FF-21CS
Solid Length 1.52 mm
Suggested Max Deflection 1.78 mm
Suggested Max Load 1.29 N
Total Coils 7
Wire Diameter 0.18 mm