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Century Spring

12139CS - 4.19" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 23 coils and closed & ground ends. This spring features an O.D. of 0.5", and an I.D. of 0.424".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 12139
Ends Closed & Ground
Finish Zinc
Free Length 4.19 in
Inside Diameter 0.424 in
Material Spring Steel
Outside Diameter 0.5 in
Part Type Standard
Rate 1.4 lbs/in
SKU 12139CS
Solid Length 0.87 in
Suggested Max Deflection 3 in
Suggested Max Load 4.3 lbf
Total Coils 23
Wire Diameter 0.038 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 12139
Ends Closed & Ground
Finish Zinc
Free Length 106.43 mm
Inside Diameter 10.77 mm
Material Spring Steel
Outside Diameter 12.7 mm
Part Type Standard
Rate 0.25 N/mm
SKU 12139CS
Solid Length 22.1 mm
Suggested Max Deflection 76.2 mm
Suggested Max Load 19.13 N
Total Coils 23
Wire Diameter 0.97 mm
The 12139CS 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 12139 spring design exhibits reliable strength across its 23 active coils, withstanding repeated compression cycles with a maximum load of 4.3 lbf without succumbing to fatigue.

We manufacture the 12139 design to provide a compression spring that is 4.19" long at rest and provides a consistent rate of 1.4 lbs/in along its recommended maximum of 3" deflection. For best results, your application should fully accommodate the inner (0.424") and outer (0.5") diameters of this spring and be designed for its closed & ground end configuration.

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