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81018CS - 4 Inch Music Wire Extension Springs

Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours

The 81018CS is an extension spring manufactured by Century Spring. It is made from Music Wire and has a natural finish. This spring has a wire diameter of 0.125 inches, an outside diameter of 1 inches, and a free length of 4 inches. It has an initial tension of 6 Pound and a maximum deflection of 2.3 inches. The 81018CS has a spring rate of 29 lbs/inch and a maximum load of 73 Pound Force. It is a full-loop spring, which means both ends are rounded. The 81018CS is a regular extension spring and is suitable for various applications.

At Century Spring, we pride ourselves on fast shipping and maintaining a significant stock inventory. Our products, including the 81018CS, are proudly made in the United States. With our efficient shipping process and ample supply, Century Spring ensures that customers can quickly receive the springs they need for their projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish None
Initial Tension 6 lb
Length 4 in
Material Music Wire
Outside Diameter 1 in
Part Type Standard
Rate 29 lbs/in
SKU 81018CS
Sugg Max Deflection 2.3 in
Sugg Max Load 73 lbf
Wind Direction Left
Wire Diameter 0.125 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish None
Initial Tension 2.72 kg
Length 101.6 mm
Material Music Wire
Outside Diameter 25.4 mm
Part Type Standard
Rate 5.08 N/mm
SKU 81018CS
Sugg Max Deflection 58.42 mm
Sugg Max Load 324.7 N
Wind Direction Left
Wire Diameter 3.18 mm