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635CS - 12 Inch High Carbon Steel Extension Springs

The 635CS 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 0.135 inches, an outside diameter of 1.312 inches, and a free length of 12 inches. It has an initial tension of 11 Pound and a maximum load of 54 Pound Force. The 635CS features machine hook ends and a left wind direction. With its reliable performance and standard measurement units, this extension spring is suitable for a wide range of applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we ensure that our products, including the 635CS, are promptly shipped to our customers. Additionally, all our springs are proudly made in the United States, guaranteeing quality and supporting local manufacturing. With our commitment to customer satisfaction and our vast selection of springs, Century Spring is the go-to destination for all your spring needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 11 lb
Length 12 in
Material High Carbon Steel
Outside Diameter 1.312 in
Part Type Standard
Rate 3.8 lbs/in
SKU 635CS
Sugg Max Deflection 12 in
Sugg Max Load 54 lbf
Wind Direction Left
Wire Diameter 0.135 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 4.99 kg
Length 304.8 mm
Material High Carbon Steel
Outside Diameter 33.32 mm
Part Type Standard
Rate 0.67 N/mm
SKU 635CS
Sugg Max Deflection 304.8 mm
Sugg Max Load 240.19 N
Wind Direction Left
Wire Diameter 3.43 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $23.19
50 - 149 $22.04
150 - 299 $20.88
300 - 499 $19.72
500 - 749 $17.40
750 - 999 $15.08
1000+ Call for price