If you want 25mm of Thread that is the Height of the Thread
Your calculation 6001.12º looks good enter this as the Angle
Hit the Green Tick Box:
I get this:
When I produce Threads I prefer to use the Thread Profile as a Cutting Tool, as in use on a Lathe.
I create a Body, either a Cylinder [Bolt] or a Hole in a Hexagon [Nut].
The effect produced requires Tools > Subtraction, the Thread being taken away from the Bolt or Nut.
EDIT: Make sure the maximum width of the Thread Former is less tham 1.5mm in this case.
From the ScreenShot yours looks OK.