When projecting threaded holes in CAXA Draft, thread relief may be displayed depending on the settings.
This section explains how to hide the thread runout.
Procedure:
[1] Select the projection view, then right-click and choose [3D view edit] → [View Properties] from the context menu.
[2] Go to the [Cosmetic thread] tab and uncheck [Show Thread Runout].

Preset Configuration:
To apply this setting to all drawings, go to:
[Menu] → [Options] → [3D Interface] → [Cosmetic Thread] tab and uncheck [Show Thread Runout] .