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Century Spring

3139CS - 1.78" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 8 coils and closed & ground ends. This spring features an O.D. of 0.812", and an I.D. of 0.518".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3139
Ends Closed & Ground
Finish Zinc
Free Length 1.78 in
Inside Diameter 0.518 in
Material Spring Steel
Outside Diameter 0.812 in
Part Type Standard
Rate 380 lbs/in
SKU 3139CS
Solid Length 1.18 in
Suggested Max Deflection 0.3 in
Suggested Max Load 114 lbf
Total Coils 8
Wire Diameter 0.147 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3139
Ends Closed & Ground
Finish Zinc
Free Length 45.21 mm
Inside Diameter 13.16 mm
Material Spring Steel
Outside Diameter 20.62 mm
Part Type Standard
Rate 66.54 N/mm
SKU 3139CS
Solid Length 29.97 mm
Suggested Max Deflection 7.62 mm
Suggested Max Load 507.07 N
Total Coils 8
Wire Diameter 3.73 mm
The 3139CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.147" diameter spring steel, the 3139 spring design exhibits reliable strength across its 8 active coils, withstanding repeated compression cycles with a maximum load of 114 lbf without succumbing to fatigue.

We manufacture the 3139 design to provide a compression spring that is 1.78" long at rest and provides a consistent rate of 380 lbs/in along its recommended maximum of 0.3" deflection. For best results, your application should fully accommodate the inner (0.518") and outer (0.812") diameters of this spring and be designed for its closed & ground end configuration.

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