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Century Spring

3289CS - 0.28" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 4 coils and closed ends. This spring features an O.D. of 0.375", and an I.D. of 0.299".

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 3289
Ends Closed
Finish Zinc
Free Length 0.28 in
Inside Diameter 0.299 in
Material Spring Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 39 lbs/in
SKU 3289CS
Solid Length 0.19 in
Suggested Max Deflection 0.09 in
Suggested Max Load 3.6 lbf
Total Coils 4
Wire Diameter 0.038 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3289
Ends Closed
Finish Zinc
Free Length 7.11 mm
Inside Diameter 7.59 mm
Material Spring Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 6.83 N/mm
SKU 3289CS
Solid Length 4.83 mm
Suggested Max Deflection 2.29 mm
Suggested Max Load 16.01 N
Total Coils 4
Wire Diameter 0.97 mm
The 3289CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.038" diameter spring steel, the 3289 spring design exhibits reliable strength across its 4 active coils, withstanding repeated compression cycles with a maximum load of 3.6 lbf without succumbing to fatigue.

We manufacture the 3289 design to provide a compression spring that is 0.28" long at rest and provides a consistent rate of 39 lbs/in along its recommended maximum of 0.09" deflection. For best results, your application should fully accommodate the inner (0.299") and outer (0.375") diameters of this spring and be designed for its closed end configuration.

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