A T-bolt is a type of fastener shaped like the letter “T” at its head. It’s designed to fit into a slot or groove so it won’t rotate while being tightened. In the context of clamps (like a T-bolt hose clamp): The T-bolt acts as the tightening mechanism. It passes through a bridge or trunnion on the clamp band, and when tightened with a nut, it applies even, high-strength pressure around the hose. These are commonly used in heavy-duty applications such as trucks, industrial machinery, and high-pressure hoses because they give more clamping force and durability than regular worm-drive clamps.