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Century Spring

3306CS - 0.69" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 3.5 coils and closed ends. This spring features an O.D. of 1.156", and an I.D. of 0.996".

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 3306
Ends Closed
Finish Zinc
Free Length 0.69 in
Inside Diameter 0.996 in
Material Spring Steel
Outside Diameter 1.156 in
Part Type Standard
Rate 32 lbs/in
SKU 3306CS
Solid Length 0.36 in
Suggested Max Deflection 0.33 in
Suggested Max Load 10 lbf
Total Coils 3.5
Wire Diameter 0.08 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3306
Ends Closed
Finish Zinc
Free Length 17.53 mm
Inside Diameter 25.3 mm
Material Spring Steel
Outside Diameter 29.36 mm
Part Type Standard
Rate 5.6 N/mm
SKU 3306CS
Solid Length 9.14 mm
Suggested Max Deflection 8.38 mm
Suggested Max Load 44.48 N
Total Coils 3.5
Wire Diameter 2.03 mm
The 3306CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.08" diameter spring steel, the 3306 spring design exhibits reliable strength across its 3.5 active coils, withstanding repeated compression cycles with a maximum load of 10 lbf without succumbing to fatigue.

We manufacture the 3306 design to provide a compression spring that is 0.69" long at rest and provides a consistent rate of 32 lbs/in along its recommended maximum of 0.33" deflection. For best results, your application should fully accommodate the inner (0.996") and outer (1.156") diameters of this spring and be designed for its closed end configuration.

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