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3818CS - 1.38" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 8.5 coils and closed & ground ends. This spring features an O.D. of 0.625", and an I.D. of 0.431".

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3818
Ends Closed & Ground
Finish Zinc
Free Length 1.38 in
Inside Diameter 0.431 in
Material Spring Steel
Outside Diameter 0.625 in
Part Type Standard
Rate 133 lbs/in
SKU 3818CS
Solid Length 0.82 in
Suggested Max Deflection 0.35 in
Suggested Max Load 46 lbf
Total Coils 8.5
Wire Diameter 0.097 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3818
Ends Closed & Ground
Finish Zinc
Free Length 35.05 mm
Inside Diameter 10.95 mm
Material Spring Steel
Outside Diameter 15.88 mm
Part Type Standard
Rate 23.29 N/mm
SKU 3818CS
Solid Length 20.83 mm
Suggested Max Deflection 8.89 mm
Suggested Max Load 204.61 N
Total Coils 8.5
Wire Diameter 2.46 mm
The 3818 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality spring steel 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 3818CS compression spring is designed with a free length of 1.88" total of 12 coils, and a rate of 110 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 3818 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.