Originally Posted by
SquidPuppet
I didn't think it was possible because I didn't think any company would use a hollow bolt to secure a wedge. Especially hollow at the top where the wrench is trying to twist the head off.
I was wrong.
It's really not an issue. Torque is highest at the perimeter, and is steadily reduced inwards, coming to zero at the center. Drilling out the core doesn't remove much torque strength.
Besides, it's not like they're reworking a standard screw. It's easy enough to add a bit of material during design to make it cope with the loads.