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Century Spring

1581CS - 0.63" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 3.5 coils and closed ends. This spring features an O.D. of 0.859", and an I.D. of 0.649".

NOTE: The spring rate value for compression springs with 4 coils or less is a reference value.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 1581
Ends Closed
Finish Zinc
Free Length 0.63 in
Inside Diameter 0.649 in
Material Spring Steel
Outside Diameter 0.859 in
Part Type Standard
Rate 272 lbs/in
SKU 1581CS
Solid Length 0.47 in
Suggested Max Deflection 0.15 in
Suggested Max Load 41 lbf
Total Coils 3.5
Wire Diameter 0.105 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 1581
Ends Closed
Finish Zinc
Free Length 16 mm
Inside Diameter 16.48 mm
Material Spring Steel
Outside Diameter 21.82 mm
Part Type Standard
Rate 47.63 N/mm
SKU 1581CS
Solid Length 11.94 mm
Suggested Max Deflection 3.81 mm
Suggested Max Load 182.37 N
Total Coils 3.5
Wire Diameter 2.67 mm
The 1581CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.105" diameter spring steel, the 1581 spring design exhibits reliable strength across its 3.5 active coils, withstanding repeated compression cycles with a maximum load of 41 lbf without succumbing to fatigue.

We manufacture the 1581 design to provide a compression spring that is 0.63" long at rest and provides a consistent rate of 272 lbs/in along its recommended maximum of 0.15" deflection. For best results, your application should fully accommodate the inner (0.649") and outer (0.859") diameters of this spring and be designed for its closed end configuration.

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