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636CS - 8.50 Inch High Carbon Steel Extension Springs

The 636CS is an extension spring manufactured by Century Spring. It features machine hook ends and a zinc finish. With a free length of 8.5 inches and a wire diameter of 0.091 inches, this High Carbon steel spring is designed for regular extension applications. It has an initial tension of 6 pounds and a maximum deflection of 6 inches. The 636CS has a maximum load capacity of 31 pound force and an outside diameter of 0.75 inches. With a spring rate of 4.2 inches per pound, it provides reliable performance. Century Spring takes pride in offering fast shipping and maintaining a significant stock inventory, ensuring that our customers can quickly receive the springs they need. Plus, all our springs are proudly made in the United States.

Century Spring understands the importance of timely delivery and adequate supply when it comes to fulfilling your spring requirements. That's why we offer fast shipping and maintain a significant stock inventory. With our extensive range of springs, including the 636CS, you can rely on us for all your spring needs. What sets us apart is our commitment to manufacturing our products in the United States, ensuring the highest quality and supporting local industries. Whether you need springs for industrial, automotive, or any other applications, Century Spring is here to provide you with reliable and efficient solutions.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 6 lb
Length 8.5 in
Material High Carbon Steel
Outside Diameter 0.75 in
Part Type Standard
Rate 4.2 lbs/in
SKU 636CS
Sugg Max Deflection 6 in
Sugg Max Load 31 lbf
Wind Direction Left
Wire Diameter 0.091 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.72 kg
Length 215.9 mm
Material High Carbon Steel
Outside Diameter 19.05 mm
Part Type Standard
Rate 0.74 N/mm
SKU 636CS
Sugg Max Deflection 152.4 mm
Sugg Max Load 137.89 N
Wind Direction Left
Wire Diameter 2.31 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $7.74
50 - 149 $7.36
150 - 299 $6.97
300 - 499 $6.58
500 - 749 $5.81
750 - 999 $5.04
1000+ Call for price