Abstract: A self-drilling and tapping screw for directly screwing together components includes a head and a shank integrally formed with the head. The shank has a self-tapping thread section and, in front thereof, a punch-forming section for flow punch forming. The shank further has at least one cutting edge with a chip removal function, which is essentially located in front of the self-tapping thread section, wherein on the one hand this cutting edge makes it possible to generate a clearance hole into at least one of the components by turning the screw, while on the other hand not impairing a flow punch forming in another component. A component assembly may be joined together by use of at least one such self-drilling and tapping screw.