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5171CS - 8 Inch Spring Steel Extension Springs

The 5171CS is a regular extension spring manufactured by Century Spring. Made from spring steel, it features a zinc finish for added durability. This spring has a free length of 8 inches and an initial tension of 2 pounds. With a maximum deflection of 5.6 inches and a maximum load of 8.7 pound force, the 5171CS is a reliable choice for various applications. Its outer diameter measures 0.312 inches, and it has a wire diameter of 0.042 inches. The spring rate is 1.3 inches per pound. The 5171CS is equipped with machine hook ends and winds in a left direction. As part of our extensive range of high-quality springs, Century Spring ensures that the 5171CS meets the highest standards of performance and reliability.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery, and our efficient shipping processes ensure that customers receive their orders promptly. With our significant stock inventory, including the 5171CS, we are able to meet the demands of various industries and projects. Additionally, all our springs are proudly made in the United States, ensuring the highest level of craftsmanship and quality. Trust Century Spring for your spring needs, and experience our commitment to excellence and customer satisfaction.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2 lb
Length 8 in
Material Spring Steel
Outside Diameter 0.312 in
Part Type Standard
Rate 1.3 lbs/in
SKU 5171CS
Sugg Max Deflection 5.6 in
Sugg Max Load 8.7 lbf
Wind Direction Left
Wire Diameter 0.042 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.91 kg
Length 203.2 mm
Material Spring Steel
Outside Diameter 7.92 mm
Part Type Standard
Rate 0.23 N/mm
SKU 5171CS
Sugg Max Deflection 142.24 mm
Sugg Max Load 38.7 N
Wind Direction Left
Wire Diameter 1.07 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $4.78
50 - 149 $4.55
150 - 299 $4.31
300 - 499 $4.07
500 - 749 $3.59
750 - 999 $3.11
1000+ Call for price