black self drilling metal screws

Brackets and connectors are specialized chipboard fixings that are designed to join chipboard sheets at right angles or to secure them to other materials such as concrete or steel. Brackets are typically made from metal and come in various sizes and shapes to accommodate different chipboard thicknesses and load requirements. Connectors, on the other hand, are mechanical fasteners that provide a strong and secure connection between chipboard sheets without the need for adhesives.


...

Another important aspect of bolt structure is the threading. The threading of a bolt refers to the grooves that wrap around the shank of the bolt. The threads on a bolt are what allow it to be screwed into a nut or a threaded hole in a material. The pitch, or distance between each thread, can vary depending on the application of the bolt. Coarse threads are better suited for applications where quick assembly is required, while fine threads are used for applications that require higher strength and precision
bolt
bolt structure.

...