If I were you, I'd invest $0.89 in a tube of blue Loc-Tite (a.k.a. Loc-Tite 242 or 243). You put a dab on each bolt or nut, then screw them together. The Loc-Tite will keep the nut from loosening. Seems to work well enough on my race bike, which regularly sees 14,500rpm and 150mph at the local racetrack...