Knurled Thumb Nuts Click the knurled thumb nut point object from the Hardware Inch/Metric tool set to insert a knurled thumb nut. Parameter Description Size For knurled thumb nut (ASME inch), specify the size/threads per inch and style. For knurled thumb nut (DIN) specify the size/thread pitch. View Select the 2D view Show Detail Indicate whether to display a detailed view of the 2D knurled thumb nut Show Center Line Select to draw the 2D knurled thumb nut with center line(s)