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S-821CS - 2.16" 302/304 Stainless Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from 302/304 stainless steel with 26.5 coils and closed ends. This spring features an O.D. of 0.312", and an I.D. of 0.24".

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name S-821
Ends Closed
Finish None
Free Length 2.16 in
Inside Diameter 0.24 in
Material 302/304 Stainless Steel
Outside Diameter 0.312 in
Part Type Standard
Rate 4.1 lbs/in
SKU S-821CS
Solid Length 0.99 in
Suggested Max Deflection 1.2 in
Suggested Max Load 4.8 lbf
Total Coils 26.5
Wire Diameter 0.036 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name S-821
Ends Closed
Finish None
Free Length 54.86 mm
Inside Diameter 6.1 mm
Material 302/304 Stainless Steel
Outside Diameter 7.92 mm
Part Type Standard
Rate 0.72 N/mm
SKU S-821CS
Solid Length 25.15 mm
Suggested Max Deflection 30.48 mm
Suggested Max Load 21.35 N
Total Coils 26.5
Wire Diameter 0.91 mm
The S-821CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.036" diameter 302/304 stainless steel, the S-821 spring design exhibits reliable strength across its 26.5 active coils, withstanding repeated compression cycles with a maximum load of 4.8 lbf without succumbing to fatigue.

We manufacture the S-821 design to provide a compression spring that is 2.16" long at rest and provides a consistent rate of 4.1 lbs/in along its recommended maximum of 1.2" deflection. For best results, your application should fully accommodate the inner (0.24") and outer (0.312") diameters of this spring and be designed for its closed end configuration.