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Century Spring

31 - 4 Inch Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from Spring Steel with 8.75 coils and Closed & Ground ends. This spring features an O.D. of 1.75 Inch, and an I.D. of 1.426 Inch.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 31
Ends Closed & Ground
Finish Zinc
Free Length 4 in
Inside Diameter 1.426 in
Material Spring Steel
Outside Diameter 1.75 in
Part Type Standard
Rate 37 lbs/in
SKU 31CS
Solid Length 1.42 in
Suggested Max Deflection 2 in
Suggested Max Load 73 lbf
Total Coils 8.75
Wire Diameter 0.162 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 31
Ends Closed & Ground
Finish Zinc
Free Length 101.6 mm
Inside Diameter 36.22 mm
Material Spring Steel
Outside Diameter 44.45 mm
Part Type Standard
Rate 6.48 N/mm
SKU 31CS
Solid Length 36.07 mm
Suggested Max Deflection 50.8 mm
Suggested Max Load 324.7 N
Total Coils 8.75
Wire Diameter 4.11 mm
The 31 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality hard drawn and designed with precision and durability in mind, this spring is an essential component for a variety of mechanical systems where reliable force and resilience are paramount.

The 31CS compression spring is designed with a free length of 3.53" total of 19 coils, and a rate of 2.5 lbs/in providing a balanced combination of flexibility and strength. This spring coil, and its closed end configuration allows for efficient energy storage and release, making it suitable for applications requiring precise motion control.

The 31 spring design is ideal for use in industrial machinery, automotive systems, and various mechanical assemblies where reliable force application is crucial. Its robust construction and thoughtful design make it a dependable choice for engineers seeking a high-performance spring solution.

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