Hex head tap bolts, also known simply as hex bolts or hexagon bolts, are a type of fastener with a hexagonal head designed to be tightened or loosened with a wrench or socket. These bolts typically have a threaded shaft and are used to fasten together two or more parts.

The hexagonal head provides a larger contact area for the tool, such as a wrench or a socket, making it easier to apply torque and tighten the bolt securely. This design also allows for a more precise application of force compared to other types of bolt heads.

Tap bolts specifically refer to fully threaded hex bolts. Unlike standard hex bolts that may have a portion of the shaft without threads, tap bolts have threads along the entire length of the shaft. This characteristic makes tap bolts useful in applications where the entire length of the bolt needs to be engaged in the threads of a tapped hole or secured with a nut.

Hex head tap bolts are commonly used in construction, machinery, automotive, and various other industries where a strong and secure fastening solution is required. They come in various materials and finishes, such as stainless steel, carbon steel, and zinc-plated steel, to suit different environmental conditions and requirements.