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Century Spring

A-12 - 0.63 Inch Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Regular compression spring in Spring Steel with 4 total coils and Closed & Ground ends. This spring features an O.D. of 0.687 Inch, and an I.D. of 0.521 Inch.

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 A-12
Ends Closed & Ground
Finish Zinc
Free Length 0.63 in
Inside Diameter 0.521 in
Material Spring Steel
Outside Diameter 0.687 in
Part Type Standard
Rate 155 lbs/in
SKU A-12CS
Solid Length 0.33 in
Suggested Max Deflection 0.18 in
Suggested Max Load 28 lbf
Total Coils 4
Wire Diameter 0.083 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name A-12
Ends Closed & Ground
Finish Zinc
Free Length 16 mm
Inside Diameter 13.23 mm
Material Spring Steel
Outside Diameter 17.45 mm
Part Type Standard
Rate 27.14 N/mm
SKU A-12CS
Solid Length 8.38 mm
Suggested Max Deflection 4.57 mm
Suggested Max Load 124.54 N
Total Coils 4
Wire Diameter 2.11 mm
The A-12CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.083" diameter hard drawn, the A-12 spring design exhibits reliable strength across its 4 active coils, withstanding repeated compression cycles with a maximum load of 28 lbf without succumbing to fatigue.

We manufacture the A-12 design to provide a compression spring that is 0.63" long at rest and provides a consistent rate of 155 lbs/in along its recommended maximum of 0.18" deflection. For best results, your application should fully accommodate the inner (0.521") and outer (0.687") diameters of this spring and be designed for its closed & ground end configuration.

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