Originally Posted by tabetha

It's nothing to do with bolts "biting", it is to do with ductility, bendiness in normal language.
SS is a far stronger material than mild steel, but it is also much much more brittle so would break instead of bend.
You will be perfectly safe with all the underbody bolts, I would just steer clear of things subject to loads of high frequency vibration like brakes.
tabetha