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Century Spring

12021CS - 5.5" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 22 coils and closed & ground ends. This spring features an O.D. of 0.859", and an I.D. of 0.785".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 12021
Ends Closed & Ground
Finish Zinc
Free Length 5.5 in
Inside Diameter 0.785 in
Material Spring Steel
Outside Diameter 0.859 in
Part Type Standard
Rate 0.24 lbs/in
SKU 12021CS
Solid Length 0.81 in
Suggested Max Deflection 4.7 in
Suggested Max Load 1.1 lbf
Total Coils 22
Wire Diameter 0.037 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 12021
Ends Closed & Ground
Finish Zinc
Free Length 139.7 mm
Inside Diameter 19.94 mm
Material Spring Steel
Outside Diameter 21.82 mm
Part Type Standard
Rate 0.04 N/mm
SKU 12021CS
Solid Length 20.57 mm
Suggested Max Deflection 119.38 mm
Suggested Max Load 4.89 N
Total Coils 22
Wire Diameter 0.94 mm
The 12021CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.037" diameter spring steel, the 12021 spring design exhibits reliable strength across its 22 active coils, withstanding repeated compression cycles with a maximum load of 1.1 lbf without succumbing to fatigue.

We manufacture the 12021 design to provide a compression spring that is 5.5" long at rest and provides a consistent rate of 0.24 lbs/in along its recommended maximum of 4.7" deflection. For best results, your application should fully accommodate the inner (0.785") and outer (0.859") diameters of this spring and be designed for its closed & ground end configuration.

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