I just installed my new JKS track-bar and the bolt on the axle end with the captured nut broke off. So i substituted it with a bolt which seems to fit it nice and snug, but it was just a regular bolt not a grade 8. I just had it in my bolt and nut bucket and would like to replace it with a grade 8 but want to know the exact size (length and diameter) I already know the socket size is 15 mm but need the dimensions before trying to get one at the bolt store.
Any info that you can provide would be appreciated.

 

it's a 10mm bolt, not standard, just bring in the old one, get the right length, get one only partially threaded if you can.