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640CS - 3.5 Inch High Carbon Steel Extension Spring

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Regular extension spring in High Carbon Steel. This spring features an O.D. of 0.437 Inch and an initial tension of 2 Pound.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 640
Ends Full Loop
Finish Zinc
Initial Tension 2 lb
Length 3.5 in
Material High Carbon Steel
Outside Diameter 0.437 in
Part Type Standard
Rate 4 lbs/in
SKU 640CS
Sugg Max Deflection 2.5 in
Sugg Max Load 12 lbf
Wire Diameter 0.054 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 640
Ends Full Loop
Finish Zinc
Initial Tension 0.91 kg
Length 88.9 mm
Material High Carbon Steel
Outside Diameter 11.1 mm
Part Type Standard
Rate 0.7 N/mm
SKU 640CS
Sugg Max Deflection 63.5 mm
Sugg Max Load 53.38 N
Wire Diameter 1.37 mm

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