Anyone know what the thread size and pitch is of the bolts that hold the front caliper bracket to the knuckle are? They look like M12x1.25 to me but I just wanna confirm as I can't bring one to match as they're stripped

 

If you haven't solved your question yet , might be a good idea to check with any Hyundai dealership parts dept. They should be able to not only answer your question , but should also have the correct bolts.
They are probably special bolts metric grade 9 or higher.