trac bar bolt

My trac bar bolt (goes through heim) is always getting loose in the trac bar brace. It is making an embarrasing clank as I turn. I have put lock tite on the bolt but it still clanks (it must have got just loose enough to move a little). How do I fix this? What is the size of the trac bar bolt?
Ben

im currently running an aftermarket track bar...so i cant helpt specifically

but what if u pull the old nut out and replace with a stainless nylock nut.

then impact it down real good and it should hold

you'll probably need to use a long extension and a universal to get up in there