That's how that's supposed to work, and they're a real saving grace sometimes, but...............Since needing to work a tap into it for a helicoil installation anyway, I'd first try the simplicity of a tap matched correctly to the threads, chased by a grade 8 bolt, and then if that didn't work I'd progress to a helicoil.Heli-Coil kit that comes with a drill bit, tap, and inserts.