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Century Spring

B4-12CS - 1.44" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 18.5 coils and closed & ground ends. This spring features an O.D. of 0.25", and an I.D. of 0.156".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name B4-12
Ends Closed & Ground
Finish None
Free Length 1.44 in
Inside Diameter 0.156 in
Material Spring Steel
Outside Diameter 0.25 in
Part Type Standard
Rate 51 lbs/in
SKU B4-12CS
Solid Length 0.87 in
Suggested Max Deflection 0.3 in
Suggested Max Load 15 lbf
Total Coils 18.5
Wire Diameter 0.047 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name B4-12
Ends Closed & Ground
Finish None
Free Length 36.58 mm
Inside Diameter 3.96 mm
Material Spring Steel
Outside Diameter 6.35 mm
Part Type Standard
Rate 8.93 N/mm
SKU B4-12CS
Solid Length 22.1 mm
Suggested Max Deflection 7.62 mm
Suggested Max Load 66.72 N
Total Coils 18.5
Wire Diameter 1.19 mm
The B4-12CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.047" diameter spring steel, the B4-12 spring design exhibits reliable strength across its 18.5 active coils, withstanding repeated compression cycles with a maximum load of 15 lbf without succumbing to fatigue.

We manufacture the B4-12 design to provide a compression spring that is 1.44" long at rest and provides a consistent rate of 51 lbs/in along its recommended maximum of 0.3" deflection. For best results, your application should fully accommodate the inner (0.156") and outer (0.25") diameters of this spring and be designed for its closed & ground end configuration.

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