Create a new sketch.

With the secondary mouse key, call the context menu of Plane XY.

New sketch ...

Click on Insert rectangle .

Lead the cursor to the coordinate system's zero-point until the snap appears and fix it with a mouse click.

From the coordinate system's zero-point, drag a rectangle and fix it with a mouse click.

In the dialog box Change parameter, enter T as width (thread depth), DG/2 as hight (thread nominal diameter) and confirm with OK.

Determine width and hight of the rectangle

Define the Rotation axis.

Click the button Cylindrical thread by length .

Note Not until a Rotation axis has been defined, the Cylindrical thread by length and Conical thread by lengths buttons are active!

Click on the respective sketch elements and areas and follow the notes in the footer:

Define thread

-> The dialog box Change parameter is opened.

Set 'T-X' for Thread length and 'X' for Run out length.

Thread: Determine parameters

Confirm with OK.

-> The thread is created.

Thread created

Rotate the right line of rectangle with 30°.

Select line to rotate and then click on the button Rotate selection.

Rotate line

Trim the marked elements to each other in their intersection point.

Click on the button Trim elements to each other .

Trim line to common point of intersection with base line (rotation axis)

The line has been trimmed to rotation axis.

Remove the protruding line end.

For this, click on the button Trim element with other .

Remove protruding line end

The protruding line end has been removed.

-> The thread is finished.

Click on the button Accept changes .

In the context menu of Sketch 3, select Cut -> Rotate....

Rotate cut - call

-> The docking window Rotational solid is opened.

Rotate cut - preview

Leave the defaults and confirm with OK.

-> The finished cap nut is displayed in the 3D view.

Cap nut in the 3D view

Finish cap nut: