Help! Wiper pivot stud broken

once you have it drilled out you might be able to slide the end of a threaded rod up into there and use a nylock nut to set it.. the hard part will be tightening the business end when you go to install the pivot - but, if you use a regular nut with a lock washer you should be able to get it tight enough - you don't need a lot of torque on there as it is cast aluminum - maybe some red or blue locktite on the rod for the regular nut...