hexagonal head bolts

Lag screws, typically used for heavy-duty applications like securing wooden beams or attaching metal to wood, have traditionally required a separate drilling step before the screwing process. However, with the advent of self-drilling versions, this dual-step process is consolidated into one swift action. The self-drilling tip, often featuring a sharp point and flutes, cuts through material effortlessly, whether it's wood, metal, or even concrete, making them highly versatile.

...

The term headed shear stud refers to a type of anchor bolt with a head, usually made from high-strength steel, that is embedded into the concrete during its placement. The stud's head, which is larger than its shank, serves as a mechanical anchor, distributing the load over a wider area and preventing pull-out failure. The term headed shear stud in URL format signifies the importance of this subject in online discussions and resources related to construction and engineering.

...