Toyota Sienna Serpentine Belt Tensioner

I Was Trying To Replace Tension-er Pilot. Pulled Alternator. Forgot To Disconnect Battery Causing Spark. Put Alternator Back On. Put New...

The Alternator Has Three Bolts Associated With It. Pivot Bolt, Tensioner Bolt And A Locking Bolt. What Size Nut Goes On The Locking Bolt To...