does anyone know what size nut goes here...

its at the very top if the bracket holding the clutch pedal. when i push the clutch in that moves against the threads and makes a lot of noise. i found a 12mm nut that kind of fits but wont thread all the way. anyone know?

its at the very top if the bracket holding the clutch pedal. when i push the clutch in that moves against the threads and makes a lot of noise. i found a 12mm nut that kind of fits but wont thread all the way. anyone know?
7A-FTE:It's not about the money.Our Beams Swap.I <3 Dustin---07/16/06