Hub bolts can break for a number of reasons, including:
* Overtightening: When a hub bolt is overtightened, it can put too much stress on the bolt and cause it to break.
* Rust and corrosion: Rust and corrosion can weaken the hub bolt over time, making it more likely to break.
* Damaged threads: Damaged threads in the lug nut can prevent it from properly securing the hub bolt, which can cause the bolt to break.
If you think you may have a broken hub bolt, it is important to have the vehicle towed to a mechanic as soon as possible. Do not attempt to drive the vehicle with a broken hub bolt, as this can be extremely dangerous.