Assembly, comprising: - a lightweight structural panel including an upper cover plate and a lower cover plate made of compact pressure-resistant material and, arranged between the cover plates (20, 38), a core made of material having a lower density than the cover plates, in particular paper honeycombs or foamed material, and - a dowel (10; 50; 60; 70) for lightweight structural panels having a head and a shaft, wherein the head has a drive arrangement accessible from a top side of the head and an outer side of the shaft has a thread, wherein a top side of the head defines a first plane, wherein a receiving channel for a fastening means extends through the head and at least in sections through the shaft, wherein an end of the shaft, located opposite to the head, has a planar abutment surface which is parallel to the first plane, characterized in that - the upper cover plate is receivable between a bottom side of the head and a thread flank of the first thread pitch of the thread facing the head such that the material of the upper cover plate can be compressed between the bottom side of the head and the thread flank of the first thread pitch facing the head, and - the planar abutment surface rests on an inner side of the lower cover plate or on a bottom surface or a shoulder surface of a bore in the lower cover plate, and in that the upper cover plate is received between the bottom side of the head and the thread surface of the first thread pitch of the thread facing the head such that the material of the upper cover plate is compressed between the bottom side of the head and the thread flank of the first thread pitch facing the head. - a lightweight structural panel including an upper cover plate and a lower cover plate made of compact pressure-resistant material and, arranged between the cover plates (20, 38), a core made of material having a lower density than the cover plates, in particular paper honeycombs or foamed material, and - a dowel (10; 50; 60; 70) for lightweight structural panels having a head and a shaft, wherein the head has a drive arrangement accessible from a top side of the head and an outer side of the shaft has a thread, wherein a top side of the head defines a first plane, wherein a receiving channel for a fastening means extends through the head and at least in sections through the shaft, wherein an end of the shaft, located opposite to the head, has a planar abutment surface which is parallel to the first plane, - the upper cover plate is receivable between a bottom side of the head and a thread flank of the first thread pitch of the thread facing the head such that the material of the upper cover plate can be compressed between the bottom side of the head and the thread flank of the first thread pitch facing the head, and - the planar abutment surface rests on an inner side of the lower cover plate or on a bottom surface or a shoulder surface of a bore in the lower cover plate, and in that the upper cover plate is received between the bottom side of the head and the thread surface of the first thread pitch of the thread facing the head such that the material of the upper cover plate is compressed between the bottom side of the head and the thread flank of the first thread pitch facing the head.