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Century Spring

F-57 - 3.25 Inch Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from Spring Steel with 35 coils and Closed & Ground ends. This spring features an O.D. of 0.312 Inch, and an I.D. of 0.224 Inch.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name F-57
Ends Closed & Ground
Finish Zinc
Free Length 3.25 in
Inside Diameter 0.224 in
Material Spring Steel
Outside Diameter 0.312 in
Part Type Standard
Rate 8.5 lbs/in
SKU F-57CS
Solid Length 1.54 in
Suggested Max Deflection 1.2 in
Suggested Max Load 10 lbf
Total Coils 35
Wire Diameter 0.044 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name F-57
Ends Closed & Ground
Finish Zinc
Free Length 82.55 mm
Inside Diameter 5.69 mm
Material Spring Steel
Outside Diameter 7.92 mm
Part Type Standard
Rate 1.49 N/mm
SKU F-57CS
Solid Length 39.12 mm
Suggested Max Deflection 30.48 mm
Suggested Max Load 44.48 N
Total Coils 35
Wire Diameter 1.12 mm
The F-57CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.044" diameter hard drawn, the F-57 spring design exhibits reliable strength across its 35 active coils, withstanding repeated compression cycles with a maximum load of 10 lbf without succumbing to fatigue.

We manufacture the F-57 design to provide a compression spring that is 3.25" long at rest and provides a consistent rate of 8.5 lbs/in along its recommended maximum of 1.2" deflection. For best results, your application should fully accommodate the inner (0.224") and outer (0.312") diameters of this spring and be designed for its closed & ground end configuration.

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