plastic expansion rivets

The fully threaded rod 1/4, as the name suggests, is a long, slim rod with threads running along its entire length. The diameter of the rod measures a quarter of an inch, hence the 1/4 designation. These threads are typically standardized, ensuring compatibility with a wide range of nuts and accessories. Made from durable materials such as stainless steel or brass, these rods are built to withstand significant force without yielding or breaking.

...

The design of these screws features a coarse thread that enables quick and efficient penetration into the chipboard. The sharp point at the tip ensures easy starting, minimizing the chances of splitting. Additionally, the bugle head, with its flat top and slightly larger diameter, allows for flush mounting and a clean finish. The screws are usually made from steel, often with a zinc coating for enhanced corrosion resistance, ensuring a long lifespan even in humid environments.

...

One of the key benefits of self-drilling screws is their ability to create precise and secure connections without the need for pre-drilled holes. This is particularly useful in applications where access to the back of the material is limited or where traditional drilling methods are impractical. Self-drilling screws are commonly used in the construction of steel and metal structures, as well as in the installation of roofing and cladding systems.

...