Problem / Question

Thread lines at center should not present in
detailing. In attached modeling or detailing file we are using
background section. Please tell me if there is any procedure to
automatically remove the center thread lines with single circular
pattern model ?

Note : Solidworks 2008 version
modeling file, detailing file and pdf file enclosed

Solution A1
Here there is no thread line at center.
It requires more drawing space and additionally
one view is to be added.

Solution A2
Here there is no thread line at center while
doing drafting, but here in modeling 4 holes are
to be generated by 2 circular pattern, so this
method is not preferred.