Specifies the nominal diameter (NCD) of the object. Select a value from the list, or type a value in the text box. If you type an unsupported or invalid value, the box displays a red border and the corresponding error message, listed below.
If displays in the box, the NCD for the object is inherited from the parent object to which the object belongs. If the icon does not display, and you need to use the parent object specification from the parent object run, select Use Run NCD. If you have manually selected the part, the NCD of the selected part displays, and you cannot change it.