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12538CS - 3.13 Inch High Carbon Steel Extension Springs

The 12538CS 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 0.125 inches, an outside diameter of 0.812 inches, and a free length of 3.13 inches. It has an initial tension of 20 Pound and a maximum deflection of 0.77 inches. The 12538CS has a spring rate of 72 inches per pound and a maximum load of 76 Pound Force. It features machine hook ends and a left wind direction. This extension spring is ideal for various applications that require reliable and durable spring tension.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand that time is of the essence for our customers, which is why we strive to deliver our products quickly. With our significant stock, including the 12538CS, customers can find the springs they need readily available. As an American company, we are committed to manufacturing high-quality products in the United States. When you choose Century Spring, you can trust that you are receiving top-notch springs that meet your requirements.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 20 lb
Length 3.13 in
Material High Carbon Steel
Outside Diameter 0.812 in
Part Type Standard
Rate 72 lbs/in
SKU 12538CS
Sugg Max Deflection 0.77 in
Sugg Max Load 76 lbf
Wind Direction Left
Wire Diameter 0.125 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 9.07 kg
Length 79.5 mm
Material High Carbon Steel
Outside Diameter 20.62 mm
Part Type Standard
Rate 12.61 N/mm
SKU 12538CS
Sugg Max Deflection 19.56 mm
Sugg Max Load 338.05 N
Wind Direction Left
Wire Diameter 3.18 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $4.20
50 - 149 $3.99
150 - 299 $3.78
300 - 499 $3.57
500 - 749 $3.15
750 - 999 $2.73
1000+ Call for price