Create a new sketch.

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

New sketch ...

Click on the button Insert rectangle .

Lead the cursor to the KO zero-point until the snap appears and fix it with a mouse click.

From the KO zero-point draw the rectangle and fix it with a mouse click.

In the dialog box Change parameter enter T as width, DG/2 as hight 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 Change parameter window opens.

Insert 'T-X' for the Thread length and 'X' for the Run out length.

Determine Thread length and Run out length

Confirm with OK. --> The thread is created.

Thread created

Trim the overhanging line end.

Trim overhanging line end

On this, click on the button Trim element with other . Choose the element to be trimmed and then the desired intersection point.

Add a line at angle of 118°+180° with length 1.

Add line

Hereto click on the button Line at angle to line with length .

Select the Base line and the Start point. --> The new line follows the cursor.

Choose the rough position and confirm with a click. --> The dialog box Change parameter is opened.

Enter the Angle 118°, the Length 1 and confirm with OK.

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

Click on the button Trim elements to each other .

Select the first element to be trimmed, then the second and then the desired intersection point.

Trim elements to each other

Result:

Elements trimmed

Remove unnecessary line:

Hereto click on Delete Element .

Delete the line which is highlighted in red in the following figure.

Delete unnecessary line

--> The thread is finished.

Thread finished

Click on the button Accept changes .

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

Rotate cut

--> The dialog box Rotational solid is opened.

Dialog box "Rotational solid"

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: