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Century Spring

F-28 - 0.53 Inch Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from Spring Steel with 5 coils and Closed ends. This spring features an O.D. of 0.375 Inch, and an I.D. of 0.285 Inch.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name F-28
Ends Closed
Finish Zinc
Free Length 0.53 in
Inside Diameter 0.285 in
Material Spring Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 55 lbs/in
SKU F-28CS
Solid Length 0.27 in
Suggested Max Deflection 0.17 in
Suggested Max Load 9.2 lbf
Total Coils 5
Wire Diameter 0.045 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name F-28
Ends Closed
Finish Zinc
Free Length 13.46 mm
Inside Diameter 7.24 mm
Material Spring Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 9.63 N/mm
SKU F-28CS
Solid Length 6.86 mm
Suggested Max Deflection 4.32 mm
Suggested Max Load 40.92 N
Total Coils 5
Wire Diameter 1.14 mm
The F-28CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.045" diameter hard drawn, the F-28 spring design exhibits reliable strength across its 5 active coils, withstanding repeated compression cycles with a maximum load of 9.2 lbf without succumbing to fatigue.

We manufacture the F-28 design to provide a compression spring that is 0.53" long at rest and provides a consistent rate of 55 lbs/in along its recommended maximum of 0.17" deflection. For best results, your application should fully accommodate the inner (0.285") and outer (0.375") diameters of this spring and be designed for its closed end configuration.

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