The self-drilling screws are mainly used for screwing on metal sheets and laminates without the need for pre-bored holes thanks to their tip which allows drilling and threading in a communication operation and a high reduction in assembly times and the labor used. The ability to drill even important thicknesses is given by the length of the tip. Correct chip discharge is a good idea that the thickness of the material is at least 1-1.5mm less than the tip size.
The large head favors a wider sealing surface as well as the covering of through holes in case of sandwich coupling between two sheets, while the low profile and without edges makes the appointment suitable for "visible" applications. This screw has wide fields of application ranging from the mechanical sector to the household appliance, from the car to the aluminum window frame.
The length of the screw is measured from the tip to the underhead.