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Century Spring

A9-51CS - 2.66" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 17 coils and closed & ground ends. This spring features an O.D. of 0.42", and an I.D. of 0.338".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name A9-51
Ends Closed & Ground
Finish Zinc
Free Length 2.66 in
Inside Diameter 0.338 in
Material Spring Steel
Outside Diameter 0.42 in
Part Type Standard
Rate 4.9 lbs/in
SKU A9-51CS
Solid Length 0.7 in
Suggested Max Deflection 1.3 in
Suggested Max Load 6.3 lbf
Total Coils 17
Wire Diameter 0.041 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name A9-51
Ends Closed & Ground
Finish Zinc
Free Length 67.56 mm
Inside Diameter 8.59 mm
Material Spring Steel
Outside Diameter 10.67 mm
Part Type Standard
Rate 0.86 N/mm
SKU A9-51CS
Solid Length 17.78 mm
Suggested Max Deflection 33.02 mm
Suggested Max Load 28.02 N
Total Coils 17
Wire Diameter 1.04 mm
The A9-51CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.041" diameter spring steel, the A9-51 spring design exhibits reliable strength across its 17 active coils, withstanding repeated compression cycles with a maximum load of 6.3 lbf without succumbing to fatigue.

We manufacture the A9-51 design to provide a compression spring that is 2.66" long at rest and provides a consistent rate of 4.9 lbs/in along its recommended maximum of 1.3" deflection. For best results, your application should fully accommodate the inner (0.338") and outer (0.42") diameters of this spring and be designed for its closed & ground end configuration.

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