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Century Spring

21 - 2.75 Inch Spring Steel Compression Spring

Inventory Status
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Compression spring manufactured from Spring Steel with 13.3 coils and Closed ends. This spring features an O.D. of 0.625 Inch, and an I.D. of 0.517 Inch.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 21
Ends Closed
Finish Zinc
Free Length 2.75 in
Inside Diameter 0.517 in
Material Spring Steel
Outside Diameter 0.625 in
Part Type Standard
Rate 5.8 lbs/in
SKU 21CS
Solid Length 0.77 in
Suggested Max Deflection 1.6 in
Suggested Max Load 9.1 lbf
Total Coils 13.3
Wire Diameter 0.054 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 21
Ends Closed
Finish Zinc
Free Length 69.85 mm
Inside Diameter 13.13 mm
Material Spring Steel
Outside Diameter 15.88 mm
Part Type Standard
Rate 1.02 N/mm
SKU 21CS
Solid Length 19.56 mm
Suggested Max Deflection 40.64 mm
Suggested Max Load 40.48 N
Total Coils 13.3
Wire Diameter 1.37 mm
The compression spring 21CS is an essential component designed for applications requiring reliable force and energy storage. Crafted from high-quality hard drawn, the 21 compression spring design exhibits exceptional tensile strength and resilience.

The 21 design is manufactured with a free length of 2.75", with an outer diameter of 0.625", an inner diameter of 0.517", and a total of 13.3 coils, expertly designed to deliver consistent compression characteristics including a rate of 5.8 lbs/in.

The 21CS compression spring is ideally suited for use in a wide range of mechanical assemblies, including but not limited to automotive suspension systems, industrial machinery, and electronic devices.

In summary, the compression spring 21 design stands out for its superior material properties, thoughtful design, and versatility in application. It is a prime choice for engineers committed to excellence and innovation in their projects.

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