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Century Spring

12639CS - 0.88" 302/304 Stainless Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from 302/304 stainless steel with 3.4 coils and closed ends. This spring features an O.D. of 0.812", and an I.D. of 0.52".

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 12639
Ends Closed
Finish None
Free Length 0.88 in
Inside Diameter 0.52 in
Material 302/304 Stainless Steel
Outside Diameter 0.812 in
Part Type Standard
Rate 1474 lbs/in
SKU 12639CS
Solid Length 0.65 in
Suggested Max Deflection 0.07 in
Suggested Max Load 103 lbf
Total Coils 3.4
Wire Diameter 0.148 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 12639
Ends Closed
Finish None
Free Length 22.35 mm
Inside Diameter 13.21 mm
Material 302/304 Stainless Steel
Outside Diameter 20.62 mm
Part Type Standard
Rate 258.1 N/mm
SKU 12639CS
Solid Length 16.51 mm
Suggested Max Deflection 1.78 mm
Suggested Max Load 458.14 N
Total Coils 3.4
Wire Diameter 3.76 mm
The 12639CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.148" diameter 302/304 stainless steel, the 12639 spring design exhibits reliable strength across its 3.4 active coils, withstanding repeated compression cycles with a maximum load of 103 lbf without succumbing to fatigue.

We manufacture the 12639 design to provide a compression spring that is 0.88" long at rest and provides a consistent rate of 1474 lbs/in along its recommended maximum of 0.07" deflection. For best results, your application should fully accommodate the inner (0.52") and outer (0.812") diameters of this spring and be designed for its closed end configuration.

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