zinc plated self tapping screws

The M20 Chemset anchor is a chemical anchor that is used to fasten bolts, rods, and other fixtures into concrete, brick, or masonry. It is designed to provide a superior bond strength compared to traditional mechanical anchors. The anchor consists of a resin cartridge and a steel rod or bolt. The resin is injected into the hole drilled into the substrate, where it cures and forms a strong bond with the surrounding material. This creates a secure connection that is capable of withstanding high loads and forces.

...

One of the primary reasons for the popularity of stainless steel structural bolts is their durability. These bolts are made from high-quality steel that has been treated to resist corrosion and rust. This means that they can withstand harsh environmental conditions, including exposure to saltwater, chemicals, and extreme temperatures. As a result, stainless steel structural bolts have a longer lifespan than other types of bolts, reducing the need for frequent replacements and maintenance.

...