In a word, no not really. Once the nut starts to tighten up on the bolt, and the little square nub underneath the top of the bolt starts to dig in, that ought to give you all the torque you need.
Tighten it up and you're done.
If you need to, buy bolts that are long enough for you to get a pair of vice-grips on the end of em, but you'll risk destroying your threads.
IMHO Dont sweat it, once the square-part bites into your hole (assujming you didn't drill too wide of a pilot hole) you'll be fine.