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MM-12CS - 1.28" 302/304 Stainless Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from 302/304 stainless steel with 6.5 coils and closed & ground ends. This spring features an O.D. of 0.843", and an I.D. of 0.663".

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name MM-12
Ends Closed & Ground
Finish None
Free Length 1.28 in
Inside Diameter 0.663 in
Material 302/304 Stainless Steel
Outside Diameter 0.843 in
Part Type Standard
Rate 44 lbs/in
SKU MM-12CS
Solid Length 0.59 in
Suggested Max Deflection 0.6 in
Suggested Max Load 26 lbf
Total Coils 6.5
Wire Diameter 0.09 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name MM-12
Ends Closed & Ground
Finish None
Free Length 32.51 mm
Inside Diameter 16.84 mm
Material 302/304 Stainless Steel
Outside Diameter 21.41 mm
Part Type Standard
Rate 7.7 N/mm
SKU MM-12CS
Solid Length 14.99 mm
Suggested Max Deflection 15.24 mm
Suggested Max Load 115.65 N
Total Coils 6.5
Wire Diameter 2.29 mm
The MM-12CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.09" diameter 302/304 stainless steel, the MM-12 spring design exhibits reliable strength across its 6.5 active coils, withstanding repeated compression cycles with a maximum load of 26 lbf without succumbing to fatigue.

We manufacture the MM-12 design to provide a compression spring that is 1.28" long at rest and provides a consistent rate of 44 lbs/in along its recommended maximum of 0.6" deflection. For best results, your application should fully accommodate the inner (0.663") and outer (0.843") diameters of this spring and be designed for its closed & ground end configuration.