Share Email Facebook Twitter LinkedIn To Detach an External BOM From a Part Reference (AutoCAD Mechanical Toolset) In the drawing area, double-click the Part Reference that is attached to an external BOM to. The Part Reference dialog box is displayed. In the External BOM section, click Detach. Click OK. Related Concepts About The BOM Attach Workflow (AutoCAD Mechanical Toolset) Related Tasks To Create a Part Reference (AutoCAD Mechanical Toolset)To Attach an External BOM to a Part Reference (AutoCAD Mechanical Toolset)To Set or Modify the Assembly Properties of a Drawing (AutoCAD Mechanical Toolset) Related Reference Commands for Working With BOMs Balloons and Parts Lists (AutoCAD Mechanical Toolset)