If you've ever been like me, looking at what appears to be the biggest Allen Bolt ever made while realizing the largest wrench in your tool kit is only good enough to fix a pair of sunglasses, you might think you're a tad bit hosed.
Never fear! Here's a quick and dirty solution.
Step 1: Get a Bolt and 2 Nuts
The trick is to either buy, or dig through your piles of bits and pieces, and get a bolt whose head is either the same size as your Allen bolt, or slightly larger, and 2 corresponding nuts.
* If you're dealing with a car or motorcycle, there's a pretty good chance you'll find one of these suckers holding useless things together, like shocks or fuel pumps.
Now that you have your bolt, make sure it fits. If you've got an oversized one, just file or grind it down to fit.