In preparation for a bit of a road trip this weekend, I repacked my wheel bearings. When bolting on the outer hub flange (with the freewheel hub selector on it) I managed to break off the heads of 2 bolts. I'll be driving 3.5-4 hours each way. While there the plan is to do some light wheeling, nothing hardcore (read: open diffs). Does anyone know the bolt size and thread for these? Am I looking for disaster if I leave without getting this fixed, or should I shrug it off till I get back?