Abstract: A hollow wall fastener comprises a conical member composed of an elastomeric material adapted to collapse when compressed longitudinally. A threaded nut is molded and secured to an apex end of the member to form an integral part thereof and a bolt is threaded in the nut. The member and nut are suitably sized and constructed to be inserted through a hole formed through a wall whereby upon rotation of the bolt the member will be drawn into bearing contact with the blind side of the wall. Alternative embodiments include the addition of an elastomeric sleeve on the bolt, the formation of one or more radial lips internally and/or externally on the member, the addition of longitudinally extending ribs on the member and the formation of two or more conically shaped portions on the member, disposed in tandem relationship relative to each other.