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Century Spring

4221CS - 1.13" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 6 coils and closed & ground ends. This spring features an O.D. of 0.687", and an I.D. of 0.519".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 4221
Ends Closed & Ground
Finish Zinc
Free Length 1.13 in
Inside Diameter 0.519 in
Material Spring Steel
Outside Diameter 0.687 in
Part Type Standard
Rate 82 lbs/in
SKU 4221CS
Solid Length 0.5 in
Suggested Max Deflection 0.36 in
Suggested Max Load 29 lbf
Total Coils 6
Wire Diameter 0.084 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 4221
Ends Closed & Ground
Finish Zinc
Free Length 28.7 mm
Inside Diameter 13.18 mm
Material Spring Steel
Outside Diameter 17.45 mm
Part Type Standard
Rate 14.36 N/mm
SKU 4221CS
Solid Length 12.7 mm
Suggested Max Deflection 9.14 mm
Suggested Max Load 128.99 N
Total Coils 6
Wire Diameter 2.13 mm
The 4221CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.084" diameter spring steel, the 4221 spring design exhibits reliable strength across its 6 active coils, withstanding repeated compression cycles with a maximum load of 29 lbf without succumbing to fatigue.

We manufacture the 4221 design to provide a compression spring that is 1.13" long at rest and provides a consistent rate of 82 lbs/in along its recommended maximum of 0.36" deflection. For best results, your application should fully accommodate the inner (0.519") and outer (0.687") diameters of this spring and be designed for its closed & ground end configuration.

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