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Century Spring

306CS - 4.5 Inch Spring Steel Extension Spring

Inventory Status
Estimated Lead Time

Regular extension spring in Spring Steel. This spring features an O.D. of 0.406 Inch and an initial tension of 0.4 Pound.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 306
Ends Machine Hook
Finish Zinc
Initial Tension 0.4 lb
Length 4.5 in
Material Spring Steel
Outside Diameter 0.406 in
Part Type Standard
Rate 0.37 lbs/in
SKU 306CS
Sugg Max Deflection 9 in
Sugg Max Load 3.7 lbf
Wind Direction Left
Wire Diameter 0.035 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 306
Ends Machine Hook
Finish Zinc
Initial Tension 0.18 kg
Length 114.3 mm
Material Spring Steel
Outside Diameter 10.31 mm
Part Type Standard
Rate 0.06 N/mm
SKU 306CS
Sugg Max Deflection 228.6 mm
Sugg Max Load 16.46 N
Wind Direction Left
Wire Diameter 0.89 mm

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