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Century Spring

71239CS - 3.5" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 28.1 coils and closed & ground ends. This spring features an O.D. of 0.36", and an I.D. of 0.258".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 71239
Ends Closed & Ground
Finish None
Free Length 3.5 in
Inside Diameter 0.258 in
Material Music Wire
Outside Diameter 0.36 in
Part Type Standard
Rate 13 lbs/in
SKU 71239CS
Solid Length 1.43 in
Suggested Max Deflection 1.4 in
Suggested Max Load 18 lbf
Total Coils 28.1
Wire Diameter 0.051 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 71239
Ends Closed & Ground
Finish None
Free Length 88.9 mm
Inside Diameter 6.55 mm
Material Music Wire
Outside Diameter 9.14 mm
Part Type Standard
Rate 2.28 N/mm
SKU 71239CS
Solid Length 36.32 mm
Suggested Max Deflection 35.56 mm
Suggested Max Load 80.06 N
Total Coils 28.1
Wire Diameter 1.3 mm
The 71239CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.051" diameter music wire, the 71239 spring design exhibits reliable strength across its 28.1 active coils, withstanding repeated compression cycles with a maximum load of 18 lbf without succumbing to fatigue.

We manufacture the 71239 design to provide a compression spring that is 3.5" long at rest and provides a consistent rate of 13 lbs/in along its recommended maximum of 1.4" deflection. For best results, your application should fully accommodate the inner (0.258") and outer (0.36") diameters of this spring and be designed for its closed & ground end configuration.

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