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Century Spring

A9-42CS - 0.38" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 3.5 coils and closed & ground ends. This spring features an O.D. of 0.42", and an I.D. of 0.334".

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 A9-42
Ends Closed & Ground
Finish Zinc
Free Length 0.38 in
Inside Diameter 0.334 in
Material Spring Steel
Outside Diameter 0.42 in
Part Type Standard
Rate 61 lbs/in
SKU A9-42CS
Solid Length 0.15 in
Suggested Max Deflection 0.12 in
Suggested Max Load 7.3 lbf
Total Coils 3.5
Wire Diameter 0.043 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name A9-42
Ends Closed & Ground
Finish Zinc
Free Length 9.65 mm
Inside Diameter 8.48 mm
Material Spring Steel
Outside Diameter 10.67 mm
Part Type Standard
Rate 10.68 N/mm
SKU A9-42CS
Solid Length 3.81 mm
Suggested Max Deflection 3.05 mm
Suggested Max Load 32.47 N
Total Coils 3.5
Wire Diameter 1.09 mm
The A9-42 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 A9-42CS compression spring is designed with a free length of 1.13" total of 10 coils, and a rate of 4.1 lbs/in providing a balanced combination of flexibility and strength. This spring coil, and its closed & ground end configuration allows for efficient energy storage and release, making it suitable for applications requiring precise motion control.

The A9-42 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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