This browser is no longer supported. Upgrade to Microsoft Edge or switch to a supported browser, like Chrome, Safari, or Firefox, to explore the MW Components website.

We're sorry for the inconvenience.

ZZ4-68 - 1.75 Inch Music Wire Extension Spring

Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours

Regular extension spring in Music Wire. This spring features an O.D. of 0.296 Inch and an initial tension of 0.4 Pound.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Display Name ZZ4-68
Ends Machine Hook
Finish Zinc
Initial Tension 0.4 lb
Length 1.75 in
Material Music Wire
Outside Diameter 0.296 in
Part Type Standard
Rate 1.5 lbs/in
SKU ZZ4-68CS
Sugg Max Deflection 2.6 in
Sugg Max Load 4.5 lbf
Wind Direction Left
Wire Diameter 0.03 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name ZZ4-68
Ends Machine Hook
Finish Zinc
Initial Tension 0.18 kg
Length 44.45 mm
Material Music Wire
Outside Diameter 7.52 mm
Part Type Standard
Rate 0.26 N/mm
SKU ZZ4-68CS
Sugg Max Deflection 66.04 mm
Sugg Max Load 20.02 N
Wind Direction Left
Wire Diameter 0.76 mm