20mm chipboard screws

Double ended threaded studs are commonly used in industries such as automotive, construction, and manufacturing
double
double ended threaded studs metric. In the automotive industry, they are used to secure engines, transmissions, and other critical components. In construction, these studs are used to fasten structural beams, columns, and other load-bearing structures. In manufacturing, they are used to secure machinery, equipment, and other industrial components.

...

The M12 in the term refers to the metric screw thread size, which measures 12 millimeters in diameter. This size is commonly used for medium to heavy-duty applications where robust anchoring is crucial. Chemical anchors, unlike mechanical anchors, rely on a chemical adhesive to create a strong bond between the anchor and the substrate. They offer advantages like high load-bearing capacity, resistance to dynamic loads, and minimal impact on the surrounding material.

...