If the thread is knackered, it can be repaired by going oversize and inserting a stainless insert which will be very strong. Assuming it is accesible to do......I used to make them and the company did repair kits with necessary Tap, Threaded Insert and Application Tool. Metric and Imperial.
One of the driver's side hub bolts has sheared some of its thread.im gonna hazard a guess @ brake calliper....
we use helicoils for stuff at work, they look like springs. Is this similar to what you had as I havent heard of any other ways of fixing knackered threads.