STP Import - gaps related to threaded holes?

Hello All,

I've been attempting to import a .stp file provided by a vendor.  Typically, after import there are 1 or 2 problematic faces that can usually be healed.  However, I then end up with 80+ gaps and I've not found anyway to resolve them.  These gaps seem to be associated with tapped holes.  I'm not experienced w/ the surface tools and don't fully understand what the problem is.  I have blindly tried multiple import options, however the processing time is substantial making iterations painful.

I'd appreciate any guidance the community can offer.

SolidworksImport export