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5478CS - 1.77 Inch Spring Steel Extension Springs

The 5478CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and features a zinc finish for added durability. This spring has a free length of 1.77 inches and an initial tension of 1 pound. It has a maximum deflection of 1.2 inches and can handle a maximum load of 5.8 pound force. The 5478CS has an outside diameter of 0.312 inches and a wire diameter of 0.037 inches. With a spring rate of 4.2 inches per pound, it provides reliable performance for a variety of applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we strive to get your orders out as quickly as possible. Additionally, our commitment to maintaining a significant stock of springs ensures that you can find the exact parts you need when you need them. As an American company, we are proud to manufacture our products in the United States, ensuring quality craftsmanship and supporting local industries. Trust Century Spring for all your spring needs, including the reliable 5478CS regular extension spring.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 1 lb
Length 1.77 in
Material Spring Steel
Outside Diameter 0.312 in
Part Type Standard
Rate 4.2 lbs/in
SKU 5478CS
Sugg Max Deflection 1.2 in
Sugg Max Load 5.8 lbf
Wind Direction Left
Wire Diameter 0.037 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.45 kg
Length 44.96 mm
Material Spring Steel
Outside Diameter 7.92 mm
Part Type Standard
Rate 0.74 N/mm
SKU 5478CS
Sugg Max Deflection 30.48 mm
Sugg Max Load 25.8 N
Wind Direction Left
Wire Diameter 0.94 mm
Inventory Status
Low Stock
Quantity Price
1 - 49 $2.09
50 - 149 $1.99
150 - 299 $1.89
300 - 499 $1.78
500 - 749 $1.57
750 - 999 $1.36
1000+ Call for price