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Century Spring

3657CS - 1.03" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 4 coils and closed ends. This spring features an O.D. of 0.968", and an I.D. of 0.843".

NOTE: The spring rate value for compression springs with 4 coils or less is a reference value.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3657
Ends Closed
Finish Zinc
Free Length 1.03 in
Inside Diameter 0.843 in
Material Spring Steel
Outside Diameter 0.968 in
Part Type Standard
Rate 15 lbs/in
SKU 3657CS
Solid Length 0.32 in
Suggested Max Deflection 0.62 in
Suggested Max Load 9.4 lbf
Total Coils 4
Wire Diameter 0.0625 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3657
Ends Closed
Finish Zinc
Free Length 26.16 mm
Inside Diameter 21.41 mm
Material Spring Steel
Outside Diameter 24.59 mm
Part Type Standard
Rate 2.63 N/mm
SKU 3657CS
Solid Length 8.13 mm
Suggested Max Deflection 15.75 mm
Suggested Max Load 41.81 N
Total Coils 4
Wire Diameter 1.59 mm
The 3657CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.0625" diameter spring steel, the 3657 spring design exhibits reliable strength across its 4 active coils, withstanding repeated compression cycles with a maximum load of 9.4 lbf without succumbing to fatigue.

We manufacture the 3657 design to provide a compression spring that is 1.03" long at rest and provides a consistent rate of 15 lbs/in along its recommended maximum of 0.62" deflection. For best results, your application should fully accommodate the inner (0.843") and outer (0.968") diameters of this spring and be designed for its closed end configuration.

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