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5688CS - 4 Inch Spring Steel Extension Springs

The 5688CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and a zinc finish. With a free length of 4 inches and an initial tension of 2 pounds, this spring is made from spring steel and can handle a maximum deflection of 2.8 inches. It has a maximum load capacity of 11 pound force and a rate of 3.1 inches per pound. The outside diameter measures 0.375 inches, while the wire diameter is 0.048 inches. This extension spring is designed for standard applications and is a reliable choice for various projects.

Century Spring takes pride in our fast shipping and extensive stock inventory. As a leading manufacturer in the United States, we ensure that our customers can count on prompt delivery of high-quality products, including the 5688CS spring. With our commitment to excellence and the convenience of readily available inventory, Century Spring is the trusted choice 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 2 lb
Length 4 in
Material Spring Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 3.1 lbs/in
SKU 5688CS
Sugg Max Deflection 2.8 in
Sugg Max Load 11 lbf
Wind Direction Left
Wire Diameter 0.048 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.91 kg
Length 101.6 mm
Material Spring Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 0.54 N/mm
SKU 5688CS
Sugg Max Deflection 71.12 mm
Sugg Max Load 48.93 N
Wind Direction Left
Wire Diameter 1.22 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $4.10
50 - 149 $3.90
150 - 299 $3.69
300 - 499 $3.49
500 - 749 $3.08
750 - 999 $2.67
1000+ Call for price