To Create a Part from an Intersection
You can create a part in Assembly by intersecting several existing components. These parts do not need to have the same units of measure. You can also modify existing parts in an assembly by intersecting them with another part.
1. Click Create. The Create Component dialog box opens.
2. Click Part, and then Intersect.
3. Accept the default file name or enter a new file name, and click OK.
4. Select parts to intersect.
The new part represents the common volume of selected components.
5. Click OK. The new part is added to the Model Tree.