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Century Spring

4399CS - 3.5" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 14 coils and closed & ground ends. This spring features an O.D. of 1.125", and an I.D. of 0.915".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 4399
Ends Closed & Ground
Finish None
Free Length 3.5 in
Inside Diameter 0.915 in
Material Spring Steel
Outside Diameter 1.125 in
Part Type Standard
Rate 14 lbs/in
SKU 4399CS
Solid Length 1.47 in
Suggested Max Deflection 2 in
Suggested Max Load 28 lbf
Total Coils 14
Wire Diameter 0.105 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 4399
Ends Closed & Ground
Finish None
Free Length 88.9 mm
Inside Diameter 23.24 mm
Material Spring Steel
Outside Diameter 28.58 mm
Part Type Standard
Rate 2.45 N/mm
SKU 4399CS
Solid Length 37.34 mm
Suggested Max Deflection 50.8 mm
Suggested Max Load 124.54 N
Total Coils 14
Wire Diameter 2.67 mm
The 4399CS 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 4399 spring design exhibits reliable strength across its 14 active coils, withstanding repeated compression cycles with a maximum load of 28 lbf without succumbing to fatigue.

We manufacture the 4399 design to provide a compression spring that is 3.5" long at rest and provides a consistent rate of 14 lbs/in along its recommended maximum of 2" deflection. For best results, your application should fully accommodate the inner (0.915") and outer (1.125") diameters of this spring and be designed for its closed & ground end configuration.

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