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5561CS - 3 Inch Music Wire Extension Springs

The 5561CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and is finished with zinc for added durability. This spring has a free length of 3 inches and an initial tension of 0.4 pounds. Made from high-quality music wire, it has a maximum deflection of 6.3 inches and can withstand a maximum load of 4.3 pounds force. With an outside diameter of 0.312 inches and a wire diameter of 0.03 inches, it has a spring rate of 0.62 inches per pound. The 5561CS is designed for standard applications and meets all measurement standards.

Century Spring takes pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery and maintaining a wide range of products for our customers. All our springs, including the 5561CS, are proudly made in the United States. Our commitment to quality and efficiency ensures that you can count on us to provide the springs you need, when you need them.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.4 lb
Length 3 in
Material Music Wire
Outside Diameter 0.312 in
Part Type Standard
Rate 0.62 lbs/in
SKU 5561CS
Sugg Max Deflection 6.3 in
Sugg Max Load 4.3 lbf
Wind Direction Left
Wire Diameter 0.03 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.18 kg
Length 76.2 mm
Material Music Wire
Outside Diameter 7.92 mm
Part Type Standard
Rate 0.11 N/mm
SKU 5561CS
Sugg Max Deflection 160.02 mm
Sugg Max Load 19.13 N
Wind Direction Left
Wire Diameter 0.76 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $2.86
50 - 149 $2.72
150 - 299 $2.58
300 - 499 $2.44
500 - 749 $2.15
750 - 999 $1.86
1000+ Call for price