The basic tapping screws are classified as thread forming and thread cutting. Thread-forming tapping screws displace the material adjacent to the pilot hole so it flows around the screw threads.

It seems like there are a million ways to attach stuff to your car. You can use adhesives, rivet nuts, bolts or if you're some type of savage, there are zip-ties. Self-tapping screws also get used a ...

These screws are used to cut or form a mating thread when driven into preformed holes. They permit rapid installation, since nuts are not used and access is required from only one side of the joint.