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B-77CS - 0.41 Inch Music Wire Extension Springs

Inventory Status
Estimated Lead Time

The B-77CS is a regular extension spring manufactured by Century Spring. It is made from Music Wire and has a natural finish. This spring has a wire diameter of 0.012 inches, an outside diameter of 0.125 inches, and a free length of 0.41 inches. It has an initial tension of 0.06 Pound and a maximum deflection of 0.64 inches. The B-77CS has a maximum load of 0.8 Pound Force and features machine hook ends. It is a left-wound spring, meaning it is wound in a counterclockwise direction. The B-77CS is a standard extension spring suitable for a variety of applications.

At Century Spring, we offer fast shipping and maintain a significant stock inventory. Our products, including the B-77CS, are proudly made in the United States. With our reliable shipping and ample supply, Century Spring ensures that customers can quickly receive the springs they need for their projects.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.06 lb
Length 0.41 in
Material Music Wire
Outside Diameter 0.125 in
Part Type Standard
Rate 1.1 lbs/in
SKU B-77CS
Sugg Max Deflection 0.64 in
Sugg Max Load 0.8 lbf
Wind Direction Left
Wire Diameter 0.012 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.03 kg
Length 10.41 mm
Material Music Wire
Outside Diameter 3.18 mm
Part Type Standard
Rate 0.19 N/mm
SKU B-77CS
Sugg Max Deflection 16.26 mm
Sugg Max Load 3.56 N
Wind Direction Left
Wire Diameter 0.3 mm