Hexagonal bolts are a commonly used type of fastener, mainly used for connecting accessories and parts. The specific application scenarios are as follows:

1. In the field of mechanical manufacturing: It is often used to connect heavy equipment and machines, such as industrial machines, agricultural machinery, etc.

2. Construction field: In construction, hexagonal bolts are typically used to fix beams and columns, connect concrete structures, etc.

3. Automotive manufacturing field: Components used to connect automobiles, such as engines, suspension systems, etc.

4. In the field of rail transit: It is often used to connect railway vehicles, such as high-speed trains and regular trains, to ensure the safety of train operation.