I don't understand how threads could be formed by extruding?
How much training do you have with Inventor?
Are you aware that the Thread tool creates simplified cosmetic representation of threads - not true cut threads?
If you want true cut threads - you will have to cut them using the Coil command. Just like out on the shop floor.
The CADWhisperer YouTube Channel
my terminology isnt correct, let me rephase this attached is an image of the stage i am at. however this is still just a cyclinder not a threaded bolt? i know in 2013 inventor there was a tool called thread modeler which modeled the thread. i want it to get to this stage.
a before and after image is attached as an example of what i need, taken from a youtube tutorial
What is the specifications for your thread?
Did the Thread Modeler add-in create the correct threads for your design?
If so, you can still get it for 2015, but I will make a significant wager that it does not create threads to your intended specifications.
Did you examine the file I attached above?
The CADWhisperer YouTube Channel
Edited 26/01/15 @16.48 GMT
In your attached files example jpg the thread is/was created using Inventor thread button in other word's it is a "Cosmetic thread"
The Thread Modeler add-in has several limitations, If your after a proper thread you'll be far better off actually modelling it your self by creating the tread profile etc.
The attached file, which is a square cut thread will give you some idea as how to proceed.
One slight problem with modelling the tread on's self is that you may get a self intersecting error this is due to the pitch which will/may need adjusting by one or two thousands of an inch/mm to get it to work. Another problem might arise when inserting the modeled thread into an assembly and aligning the treads of the parts to have them both look right and appear to engage correctly
So unless your going to 3D print a thread part just use the normal cosmetic thread instead of creating unnecessary work and headaches for your self.