Phosphated plasterboard screws / drywall screws with coarse thread are used in the wall and ceiling area and for the attachment of plasterboard, as well as for anchoring hangers and ceiling coverings on wooden substructures. They are screwed directly without pre-drilling. The self-tapping coarse thread ensures easy screwing into the plasterboard and ensures an optimal hold in the substructure. The trumpet head ensures optimal countersinking of the screw head on the plasterboard.