John Deere Original Equipment Extension Spring - TCU20773 Knives and Guards Fits the following ZTrak Mower

Fits the following ZTrak Mower Models: Z820A

Material Grade-8

XUV825E Gator Utility Vehicle

4120 compact tractor(PC9396)

Tractor Multi-Terrain Series

John Deere Original Equipment Extension Spring - TCU20773 Knives and Guards Fits the following ZTrak MowerJohn Deere Original Equipment Extension Spring TCU20773 End Type: 02 03 Wire Diameter: 3. 429 MM Outside Diameter: 29. 490 MM Free Length: 179. 970 MM Spring Rate (LBF in or N mm): 2. 570 N MM Initial Tension (LBF or N): 50. 710 N Number of Coils: 30. 000 UNITY Material: A15 7 Finish: K Fits the following John Deere models: 647, 647A, 657, 657A, 667, 667A, 717, 717A, 717E, 727, 727A. This is an O. E. M. John Deere Part.