Another idea is to use insert nuts {home depot cabinet hardware area}, something like so.
http://www.woodpeck.com/media/main_inserthex.jpg
You drill the correct hole to install those, but before you install them you get some
JB weld epoxy glue as it hardens like a rock and you apply the glue to the nut and
then install it. It's pretty tough after a 24 hour cure. The 5 minute epoxies are rubbery,
don't use those.