Red Loctite is your friend. Use brake cleaner or carb cleaner to get the threads in the hub and the bolts squeaky clean, and put a drop or two of Loctite on them as you assemble things. The red color is designed for "permanent" installations, so it might be necessary to heat the bolt heads to about 300 degrees with a torch the next time you want to remove the axles.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!