self drilling plastic wall anchors

A wafer head screw, as the name suggests, has a flat, thin, and circular head, resembling a wafer. The head is usually larger than the screw's body, providing a broad bearing surface that distributes the load evenly and reduces the chances of damage to the material being fastened. The self-tapping attribute refers to the screw's ability to cut its way through the material it is inserted into, forming threads as it goes, hence the term self-tapping.

...

In composite construction, where steel and concrete work together, shear studs act as connectors, ensuring that the two materials move as one unit under load. This composite action significantly enhances the overall performance of the structure, improving its strength, stiffness, and durability This composite action significantly enhances the overall performance of the structure, improving its strength, stiffness, and durability This composite action significantly enhances the overall performance of the structure, improving its strength, stiffness, and durability This composite action significantly enhances the overall performance of the structure, improving its strength, stiffness, and durabilitysteel shear studs. The use of shear studs also reduces the need for heavy concrete sections, thereby optimizing material usage and reducing construction costs.

...