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Century Spring

DD-21CS - 0.38" 302/304 Stainless Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from 302/304 stainless steel with 3 coils and closed & ground ends. This spring features an O.D. of 0.42", and an I.D. of 0.34".

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 DD-21
Ends Closed & Ground
Finish None
Free Length 0.38 in
Inside Diameter 0.34 in
Material 302/304 Stainless Steel
Outside Diameter 0.42 in
Part Type Standard
Rate 59 lbs/in
SKU DD-21CS
Solid Length 0.12 in
Suggested Max Deflection 0.09 in
Suggested Max Load 5.5 lbf
Total Coils 3
Wire Diameter 0.04 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name DD-21
Ends Closed & Ground
Finish None
Free Length 9.65 mm
Inside Diameter 8.64 mm
Material 302/304 Stainless Steel
Outside Diameter 10.67 mm
Part Type Standard
Rate 10.33 N/mm
SKU DD-21CS
Solid Length 3.05 mm
Suggested Max Deflection 2.29 mm
Suggested Max Load 24.46 N
Total Coils 3
Wire Diameter 1.02 mm
The compression spring DD-21CS is an essential component designed for applications requiring reliable force and energy storage. Crafted from high-quality 302/304 stainless steel, the DD-21 compression spring design exhibits exceptional tensile strength and resilience.

The DD-21 design is manufactured with a free length of 0.38", with an outer diameter of 0.42", an inner diameter of 0.34", and a total of 3 coils, expertly designed to deliver consistent compression characteristics including a rate of 59 lbs/in.

The DD-21CS compression spring is ideally suited for use in a wide range of mechanical assemblies, including but not limited to automotive suspension systems, industrial machinery, and electronic devices.

In summary, the compression spring DD-21 design stands out for its superior material properties, thoughtful design, and versatility in application. It is a prime choice for engineers committed to excellence and innovation in their projects.

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