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5409CS - 1 Inch Music Wire Extension Springs

The 5409CS is a regular extension spring manufactured by Century Spring. It features a machine hook on both ends and is finished with zinc for added durability. This spring has a free length of 1 inch and an initial tension of 0.3 pound. Made from high-quality music wire, it has a maximum deflection of 1.2 inches and can withstand a maximum load of 4 pound force. With an outside diameter of 0.375 inch and a wire diameter of 0.031 inches, this spring has a rate of 3.1 inches per pound. It is designed for standard applications and is suitable for a variety of projects.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of quick delivery, which is why we ensure prompt shipping for all our products, including the 5409CS. Additionally, our springs are proudly made in the United States, guaranteeing quality and reliability. With our efficient shipping process and ample supply, Century Spring is committed to providing customers with the springs they need in a timely manner.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.3 lb
Length 1 in
Material Music Wire
Outside Diameter 0.375 in
Part Type Standard
Rate 3.1 lbs/in
SKU 5409CS
Sugg Max Deflection 1.2 in
Sugg Max Load 4 lbf
Wind Direction Left
Wire Diameter 0.031 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.14 kg
Length 25.4 mm
Material Music Wire
Outside Diameter 9.53 mm
Part Type Standard
Rate 0.54 N/mm
SKU 5409CS
Sugg Max Deflection 30.48 mm
Sugg Max Load 17.79 N
Wind Direction Left
Wire Diameter 0.79 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $2.45
50 - 149 $2.33
150 - 299 $2.21
300 - 499 $2.09
500 - 749 $1.84
750 - 999 $1.60
1000+ Call for price