Piercing element Vormontagebauteil, component assembly and method

The present invention relates, inter alia, a piercing member with a hollow head part of larger transverse dimension, with a hollow shaft portion of smaller transverse dimension, which protrudes away from a side of the head portion, wherein an annular sheet metal contact surface is formed on said side of the head part and surrounds the shaft part, with a plurality ribs on the outer periphery of the stem portion extending in the axial direction along the shaft portion of the sheet metal contact surface to close to the free end of the shaft part. There are also claims a Vormontagebauteil, a component assembly and a method.