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B4-21CS - 2.50 Inch Music Wire Compression Springs

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The B4-21CS is a regular compression spring manufactured by Century Spring. It is made from high-quality Music Wire and has a smooth, natural finish. This spring has a wire diameter of 0.03 inches, an outer diameter of 0.234 inches, and a free length of 2.5 inches. With a spring rate of 5 lbs/inch, it can handle a maximum load of 6.3 Pound Force and has a maximum deflection of 1.3 inches. The B4-21CS is a closed-end spring, meaning the ends are squared, providing stability and support. This standard compression spring is suitable for a wide range of applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, and our efficient shipping process ensures that customers receive their springs promptly. Additionally, we maintain a significant stock inventory, ensuring that the B4-21CS and other springs are readily available for immediate shipment. We are committed to manufacturing our products in the United States, upholding high-quality standards and supporting local businesses. Trust Century Spring for all your spring needs.

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Closed
Finish None
Free Length 2.5 in
Inside Diameter 0.174 in
Material Music Wire
Outside Diameter 0.234 in
Part Type Standard
Rate 5 lbs/in
SKU B4-21CS
Solid Length 0.91 in
Suggested Max Deflection 1.3 in
Suggested Max Load 6.3 lbf
Total Coils 29.3
Wire Diameter 0.03 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Closed
Finish None
Free Length 63.5 mm
Inside Diameter 4.42 mm
Material Music Wire
Outside Diameter 5.94 mm
Part Type Standard
Rate 0.88 N/mm
SKU B4-21CS
Solid Length 23.11 mm
Suggested Max Deflection 33.02 mm
Suggested Max Load 28.02 N
Total Coils 29.3
Wire Diameter 0.76 mm