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S-644CS - 1.50 Inch 302/304 Stainless Steel Extension Springs

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The S-644CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 stainless steel and has a natural finish. This spring has a wire diameter of 0.072 inches, an outside diameter of 0.375 inches, and a free length of 1.5 inches. It has an initial tension of 11 pounds and a maximum deflection of 0.2 inches. The S-644CS has a maximum load of 34 pound force and a spring rate of 115 lbs/inch. It features extended hook ends and is suitable for various extension spring applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. Our springs, including the S-644CS, are proudly made in the United States. With our efficient shipping process and ample supply, Century Spring ensures that customers can quickly receive the high-quality springs they need for their projects.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Extended Hook
Finish None
Initial Tension 11 lb
Length 1.5 in
Material 302/304 Stainless Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 115 lbs/in
SKU S-644CS
Sugg Max Deflection 0.2 in
Sugg Max Load 34 lbf
Wire Diameter 0.072 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Extended Hook
Finish None
Initial Tension 4.99 kg
Length 38.1 mm
Material 302/304 Stainless Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 20.14 N/mm
SKU S-644CS
Sugg Max Deflection 5.08 mm
Sugg Max Load 151.23 N
Wire Diameter 1.83 mm