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3890CS - 1.5" Spring Steel Compression Spring

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Compression spring manufactured from spring steel with 12.5 coils and closed ends. This spring features an O.D. of 0.343", and an I.D. of 0.273".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3890
Ends Closed
Finish Zinc
Free Length 1.5 in
Inside Diameter 0.273 in
Material Spring Steel
Outside Diameter 0.343 in
Part Type Standard
Rate 7 lbs/in
SKU 3890CS
Solid Length 0.47 in
Suggested Max Deflection 0.68 in
Suggested Max Load 4.8 lbf
Total Coils 12.5
Wire Diameter 0.035 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3890
Ends Closed
Finish Zinc
Free Length 38.1 mm
Inside Diameter 6.93 mm
Material Spring Steel
Outside Diameter 8.71 mm
Part Type Standard
Rate 1.23 N/mm
SKU 3890CS
Solid Length 11.94 mm
Suggested Max Deflection 17.27 mm
Suggested Max Load 21.35 N
Total Coils 12.5
Wire Diameter 0.89 mm
The 3890CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.035" diameter spring steel, the 3890 spring design exhibits reliable strength across its 12.5 active coils, withstanding repeated compression cycles with a maximum load of 4.8 lbf without succumbing to fatigue.

We manufacture the 3890 design to provide a compression spring that is 1.5" long at rest and provides a consistent rate of 7 lbs/in along its recommended maximum of 0.68" deflection. For best results, your application should fully accommodate the inner (0.273") and outer (0.343") diameters of this spring and be designed for its closed end configuration.

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