Originally Posted by
BCRider
Axle threads are very often a non standard thread pitch falling under specialty items. You won't find the die for them at the normal hardware stores even if those stores handle metric tools. You'll need to hit up a specialty machine tool outlet such as KBC or Emco. Not to mention that the good ones cost as much or more than what a new axle would cost.
That's where the $10 thread file comes in really handy

(available at most automotive parts store BTW)