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5099CS - 4 Inch High Carbon Steel Extension Springs

The 5099CS is an extension spring manufactured by Century Spring. It features machine hook ends and a zinc finish. With a free length of 4 inches, this spring has an initial tension of 5 pounds. Made from High Carbon steel, it can handle a maximum deflection of 2.7 inches and support a maximum load of 29 pound force. The spring has an outside diameter of 0.812 inches and a rate of 8.8 inches per pound. It weighs 0.1406 pounds and has a wire diameter of 0.091 inches. This standard-sized spring is perfect for various extension spring applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We offer a wide range of springs, including the 5099CS, all made in the United States. With our efficient shipping process and ample supply, we ensure that our customers receive their springs promptly for their projects. Trust Century Spring for your spring needs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 5 lb
Length 4 in
Material High Carbon Steel
Outside Diameter 0.812 in
Part Type Standard
Rate 8.8 lbs/in
SKU 5099CS
Sugg Max Deflection 2.7 in
Sugg Max Load 29 lbf
Wind Direction Left
Wire Diameter 0.091 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.27 kg
Length 101.6 mm
Material High Carbon Steel
Outside Diameter 20.62 mm
Part Type Standard
Rate 1.54 N/mm
SKU 5099CS
Sugg Max Deflection 68.58 mm
Sugg Max Load 128.99 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 $5.08
50 - 149 $4.83
150 - 299 $4.58
300 - 499 $4.32
500 - 749 $3.81
750 - 999 $3.31
1000+ Call for price