Wall fastener and method of fabrication

A quenched, thin, sheet metal anchor for a fastening member for a hollow wall, the fastening member comprising in addition to the anchor a fastener for insertion in the anchor, the anchor comprising a substantially flat head portion and a hold therethrough, said hole having an axis perpendicular to the head, a substantially flat neck in a plane perpendicular to the head containing the axis, the neck having an opening therethrough, the opening extending in the plane of the neck the full length of the neck along the axis and, first and second, thin flat sheet metal spreadable anchoring blades extending from said neck in the direction of the axis, the blades being coplanar with the neck, each of the blades having an inner and an outer surface, the inner surface of the first blade being adjacent the inner surface of the second blade, at least one of said blades terminating in a point, the first blade, having a bent portion extending obliquely from the first blade toward the second blade, the bent portion comprising an end and two lateral sides and forming a first part of a complementary engaging means, the second part of the complementary engaging means being on the second blade, the bent portion extending at least partially into the engaging means in the second blade, at least one of the two lateral sides of the bent portion frictionally engaging at least a part of the engaging means in the second blade.