Century Spring

B4-4CS - 0.73" Music Wire Compression Spring

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Compression spring manufactured from music wire with 18.5 coils and closed ends. This spring features an O.D. of 0.125", and an I.D. of 0.089".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name B4-4
Ends Closed
Finish None
Free Length 0.73 in
Inside Diameter 0.089 in
Material Music Wire
Outside Diameter 0.125 in
Part Type Standard
Rate 7.5 lbs/in
SKU B4-4CS
Solid Length 0.35 in
Suggested Max Deflection 0.36 in
Suggested Max Load 2.7 lbf
Total Coils 18.5
Wire Diameter 0.018 in
The B4-4CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.018" diameter music wire, the B4-4 spring design exhibits reliable strength across its 18.5 active coils, withstanding repeated compression cycles with a maximum load of 2.7 lbf without succumbing to fatigue.

We manufacture the B4-4 design to provide a compression spring that is 0.73" long at rest and provides a consistent rate of 7.5 lbs/in along its recommended maximum of 0.36" deflection. For best results, your application should fully accommodate the inner (0.089") and outer (0.125") diameters of this spring and be designed for its closed end configuration.

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