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Century Spring

3903CS - 1.38" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 10 coils and closed & ground ends. This spring features an O.D. of 0.484", and an I.D. of 0.264".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3903
Ends Closed & Ground
Finish Zinc
Free Length 1.38 in
Inside Diameter 0.264 in
Material Spring Steel
Outside Diameter 0.484 in
Part Type Standard
Rate 503 lbs/in
SKU 3903CS
Solid Length 1.1 in
Suggested Max Deflection 0.16 in
Suggested Max Load 79 lbf
Total Coils 10
Wire Diameter 0.11 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3903
Ends Closed & Ground
Finish Zinc
Free Length 35.05 mm
Inside Diameter 6.71 mm
Material Spring Steel
Outside Diameter 12.29 mm
Part Type Standard
Rate 88.08 N/mm
SKU 3903CS
Solid Length 27.94 mm
Suggested Max Deflection 4.06 mm
Suggested Max Load 351.39 N
Total Coils 10
Wire Diameter 2.79 mm
The 3903CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.11" diameter spring steel, the 3903 spring design exhibits reliable strength across its 10 active coils, withstanding repeated compression cycles with a maximum load of 79 lbf without succumbing to fatigue.

We manufacture the 3903 design to provide a compression spring that is 1.38" long at rest and provides a consistent rate of 503 lbs/in along its recommended maximum of 0.16" deflection. For best results, your application should fully accommodate the inner (0.264") and outer (0.484") diameters of this spring and be designed for its closed & ground end configuration.

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