What is the strongest bolt?

Excuse me, could you elaborate on what you mean by 'the strongest bolt'? Are you referring to the material it's made of, the size, or perhaps the application it's intended for? In the world of fasteners, there are many factors that can determine the strength of a bolt, such as the grade of steel used, the thread pattern, and even the coating applied to prevent corrosion. Could you please clarify your question so I can provide a more accurate answer?