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There are several things to do when drawing a part with threaded features:
1. (I can't tell if you've done this already based on the picture attached) Define the threaded holes on the 3D model with the Hole command (or the Thread command).
2. On the drawing, change the View Properties to include Axis, Center Line, and Thread. (all views) Threaded features on the 3D model will now be shown on the drawing with the correct symbols for threads (based on drafting standard).
3. To dimension the thread size, use the Thread Dimension command. Or, add Text With Leader and type in the thread information.
Thanks for you help yes i have defined the thread in 3d model (for some reason thread doesn't appear on 3d model), another question how do i change the view properties in drafting. Sorry im new to catia.