Tuna
Totally forgot... I apologize.
Will stop by the hangar tomorrow and get one to measure.
Jeff
KF 5
340KF
Here is the template for Grove axles. You should be able to identify the correct one based on the part number for your axle.
http://www.groveaircraft.com/axletemplate.pdf
Ralph
Tuna
Sorry for the long delay but here is a scan of the part...
It's .060 inch thick 4130 steel
Jeff
KF 5
340KF