You may wish to display the lineweight thicknesses in your model space within AutoCAD, or you may wish to turn off lineweight thickness in AutoCAD.
Simply type LW into your command line.
To Turn on lineweights. In the “Lineweight Settings” dialogue box, tick “Display Lineweight” as shown below. With this setting un-ticked the lineweights will not display.
Below is the result with Display Lineweight” ticked.
Below is the result with Display Lineweight” un–ticked.
Clint Brown 
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