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Century Spring

2991CS - 5.25" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 16 coils and closed ends. This spring features an O.D. of 1.156", and an I.D. of 1.026".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 2991
Ends Closed
Finish Zinc
Free Length 5.25 in
Inside Diameter 1.026 in
Material Spring Steel
Outside Diameter 1.156 in
Part Type Standard
Rate 1.4 lbs/in
SKU 2991CS
Solid Length 1.11 in
Suggested Max Deflection 4.1 in
Suggested Max Load 5.9 lbf
Total Coils 16
Wire Diameter 0.065 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 2991
Ends Closed
Finish Zinc
Free Length 133.35 mm
Inside Diameter 26.06 mm
Material Spring Steel
Outside Diameter 29.36 mm
Part Type Standard
Rate 0.25 N/mm
SKU 2991CS
Solid Length 28.19 mm
Suggested Max Deflection 104.14 mm
Suggested Max Load 26.24 N
Total Coils 16
Wire Diameter 1.65 mm
The 2991CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.065" diameter spring steel, the 2991 spring design exhibits reliable strength across its 16 active coils, withstanding repeated compression cycles with a maximum load of 5.9 lbf without succumbing to fatigue.

We manufacture the 2991 design to provide a compression spring that is 5.25" long at rest and provides a consistent rate of 1.4 lbs/in along its recommended maximum of 4.1" deflection. For best results, your application should fully accommodate the inner (1.026") and outer (1.156") diameters of this spring and be designed for its closed end configuration.

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