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S-638CS - 12.80 Inch 302/304 Stainless Steel Extension Springs

Inventory Status
Estimated Lead Time

The S-638CS is a regular extension spring from Century Spring. It features extended hook ends and is made from 302/304 stainless steel. This spring has a free length of 12.8 inches and an initial tension of 69 pounds. With a maximum deflection of 2.9 inches and a maximum load of 202 pounds force, it is a reliable choice for various applications. The S-638CS has an outside diameter of 1.406 inches and a wire diameter of 0.225 inches, providing the necessary strength and flexibility.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery and strive to ensure that our customers receive their springs promptly. Additionally, we are proud to say that all our products, including the S-638CS, are made right here in the United States. With our commitment to quality and availability, Century Spring is your trusted source for springs.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Extended Hook
Finish None
Initial Tension 69 lb
Length 12.8 in
Material 302/304 Stainless Steel
Outside Diameter 1.406 in
Part Type Standard
Rate 46 lbs/in
SKU S-638CS
Sugg Max Deflection 2.9 in
Sugg Max Load 202 lbf
Wind Direction Left
Wire Diameter 0.225 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Extended Hook
Finish None
Initial Tension 31.29 kg
Length 325.12 mm
Material 302/304 Stainless Steel
Outside Diameter 35.71 mm
Part Type Standard
Rate 8.05 N/mm
SKU S-638CS
Sugg Max Deflection 73.66 mm
Sugg Max Load 898.5 N
Wind Direction Left
Wire Diameter 5.72 mm