Stainless screws

[Gattonero]

No, I would advise a ham-fisted user to not touch any fixture of the bike, at all

Some seat clamps with 4mm allen bolt do get rounded off, on top of squashing the clamp, distorting the frame/sleeve, and pinch a carbon seatpost (obviously there is another problem there, but the ham-fisted will just crank up the bolt).
For the same reason, this happens to stems, too.
Also some mudguard fixtures with 3mm allen, better use threadlock than trying to achieve 10Nm on a 3mm hex

[531colin]

interesting....on shop test bikes the saddle is moved every time somebody tries the bike, and stems are swapped frequently.
I have never, ever seen either stem or seatpost clamp bolts rounded out, but I have had seatpost clamp bolts fail (fatigue) where the bolt is flexed every time. (The clamp faces are no longer parallel once it is done up a few times)
On my own bikes i have made the seatpost clamp fix with a nut so that the bolt isn't flexed each time i take the seatpost out to secure the bike in the car.
with a carbon seatpost, get a torque wrench.
10nm on a mudguard bolt? astonishing for?