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12349CS - 8.13 Inch Spring Steel Extension Springs

The 12349CS is an extension spring manufactured by Century Spring. It features a machine hook on both ends, allowing for easy installation. Made from high-quality spring steel, this spring has a zinc finish for added durability. With a free length of 8.13 inches and an initial tension of 6 pounds, it offers reliable performance. The 12349CS has a maximum deflection of 7.4 inches and can withstand a maximum load of 35 pounds force. Its standard measurement units make it compatible with a wide range of applications. With an outside diameter of 1 inch and a wire diameter of 0.105 inches, this spring has a rate of 4 inch-pounds. Century Spring ensures that the 12349CS meets the highest standards of quality and performance.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we strive to ship our products as quickly as possible. With our significant stock of springs, including the 12349CS, customers can find the right parts they need without delay. We are proud to manufacture all our springs in the United States, ensuring superior quality and supporting local businesses. Whether you need springs for industrial, automotive, or other applications, Century Spring is here to provide you with reliable products and exceptional service.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 6 lb
Length 8.13 in
Material Spring Steel
Outside Diameter 1 in
Part Type Standard
Rate 4 lbs/in
SKU 12349CS
Sugg Max Deflection 7.4 in
Sugg Max Load 35 lbf
Wind Direction Left
Wire Diameter 0.105 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.72 kg
Length 206.5 mm
Material Spring Steel
Outside Diameter 25.4 mm
Part Type Standard
Rate 0.7 N/mm
SKU 12349CS
Sugg Max Deflection 187.96 mm
Sugg Max Load 155.68 N
Wind Direction Left
Wire Diameter 2.67 mm
Inventory Status
Low Stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $8.44
50 - 149 $8.02
150 - 299 $7.60
300 - 499 $7.18
500 - 749 $6.33
750 - 999 $5.49
1000+ Call for price