If you tighten a bolt too far or too often, it will pull part of the thread out from what you are tightening it into. The thread comes out within the thread of the bolt, and you’re left with no way of tightening the bolt. A Helicoil insert is a way of replacing that thread – and it’s really quite easy.
Read moreHow to fit a Helicoil | Step-by-step guide
