There are also thread repair inserts.  Check with MSC online.

On Tue, Feb 17, 2015 at 11:20 AM, Harry Hoffman <hhoffman@ip-solutions.net>
wrote:

> Tap and die set.
>
> Cheers,
> Harry
>
> On 2/17/15 2:17 PM, John Rodgers wrote:
> > OK! Stroke Brain at work here. What the devil is the deviced called that
> > can be put in place to restore a badly damaged thread. Can't remember for
> > the life of me.
> >
> > Hole in alternator frame for belt tensioning device is stripped and it
> > won't hold, Alternator works fine, just the hole in the aluminum is gone.
> > Need to drill it out and put some of steel in there.
> >
> > Thanks,
> >
> > John
> >
>