A SCREW, IN PARTICULAR FOR THE FASTENING OF PLASTER BOARDS

摘要

A special screw for the fastening of plaster boards is configured with a block-shaped screw head which on the under side has an annular cavity around the screw shank. When use is made of such a screw, the plaster mass which is displaced by the screw will be compressed inside the said cavity, and since the under side of the screw head in itself does not give rise to any radial pressing-out of the mass, a bulging-out of the plaster which would otherwise typically arise around the fully screwed-in screw head is completely avoided. The subsequent sanding work which would otherwise be necessary can hereby be reduced to a minimum or be totally eliminated.