G'day all,
+1 to Norm on this - I do have 'thread restoring files' on hand here, but a triangular needle file will do the job just fine.
As I've said earlier in this thread, a 'die nut' will work better than a button die here, unless you have the right size die holder for the button die.
Is it just that the top of the thread is burred, from being hit with a hammer?