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MM-81 - 0.81 Inch Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from Spring Steel with 16 coils and Closed & Ground ends. This spring features an O.D. of 0.219 Inch, and an I.D. of 0.155 Inch.

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name MM-81
Ends Closed & Ground
Finish Zinc
Free Length 0.81 in
Inside Diameter 0.155 in
Material Spring Steel
Outside Diameter 0.219 in
Part Type Standard
Rate 16 lbs/in
SKU MM-81CS
Solid Length 0.51 in
Suggested Max Deflection 0.3 in
Suggested Max Load 4.9 lbf
Total Coils 16
Wire Diameter 0.032 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name MM-81
Ends Closed & Ground
Finish Zinc
Free Length 20.57 mm
Inside Diameter 3.94 mm
Material Spring Steel
Outside Diameter 5.56 mm
Part Type Standard
Rate 2.8 N/mm
SKU MM-81CS
Solid Length 12.95 mm
Suggested Max Deflection 7.62 mm
Suggested Max Load 21.8 N
Total Coils 16
Wire Diameter 0.81 mm
The compression spring MM-81CS is an essential component designed for applications requiring reliable force and energy storage. Crafted from high-quality hard drawn, the MM-81 compression spring design exhibits exceptional tensile strength and resilience.

The MM-81 design is manufactured with a free length of 0.81", with an outer diameter of 0.219", an inner diameter of 0.155", and a total of 16 coils, expertly designed to deliver consistent compression characteristics including a rate of 16 lbs/in.

The MM-81CS compression spring is ideally suited for use in a wide range of mechanical assemblies, including but not limited to automotive suspension systems, industrial machinery, and electronic devices.

In summary, the compression spring MM-81 design stands out for its superior material properties, thoughtful design, and versatility in application. It is a prime choice for engineers committed to excellence and innovation in their projects.