Registered Forum User
Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
Mood: Bloo and Yellow.. and Red now ;)
Split the side of them off with a small, sharp chisel. or get a nut splitter.
You'll probably get away with running a die up them to clean them and you're sorted.
If you start drilling and swinging on the stud, you could lose the thread in the head and then you'll need a Helicoil.