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661CS - 7 Inch High Carbon Steel Extension Springs

The 661CS is a regular extension spring manufactured by Century Spring. It is made from High Carbon steel and has a zinc finish. This spring has a wire diameter of 0.243 inches, an outside diameter of 1.5 inches, and a free length of 7 inches. It has an initial tension of 87 Pound and a maximum deflection of 1.7 inches. The 661CS has a spring rate of 112 inches per pound and a maximum load of 275 Pound Force. It features machine hook ends 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 661CS, are proudly made in the United States. With our efficient shipping services 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 Machine Hook
Finish Zinc
Initial Tension 87 lb
Length 7 in
Material High Carbon Steel
Outside Diameter 1.5 in
Part Type Standard
Rate 112 lbs/in
SKU 661CS
Sugg Max Deflection 1.7 in
Sugg Max Load 275 lbf
Wind Direction Left
Wire Diameter 0.243 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 39.46 kg
Length 177.8 mm
Material High Carbon Steel
Outside Diameter 38.1 mm
Part Type Standard
Rate 19.61 N/mm
SKU 661CS
Sugg Max Deflection 43.18 mm
Sugg Max Load 1223.2 N
Wind Direction Left
Wire Diameter 6.17 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $23.48
50 - 149 $22.31
150 - 299 $21.14
300 - 499 $19.96
500 - 749 $17.61
750 - 999 $15.27
1000+ Call for price