Abstract: A fastener with a flange having two pairs of parallel sides and arcuate corners. Extending upwardly from the top surface of the flange is an elongated shaft having one region adjacent the flange having relatively thicker threaded walls and another distal from the flange having thinner unthreaded walls. Two prongs are formed by making cuts in opposing straight sides adjacent to the diagonally opposing arcuate corners, and then bending peripheral portions of the flange including the arcuate corners adjacent to the cuts in a direction upwardly by substantially 90°. The depth of the cuts is such that when bends are made, the perpendicular distance between front surfaces of the two prongs is less than an outer diameter of the shaft. When the fastener is inserted in a piece of material, the prongs dig into the surface of the material to prevent the fastener from rotating when a threaded fastener is screwed into the shaft.

Abstract: A fastener with a flange having two pairs of parallel sides and arcuate corners. Extending upwardly from the top surface of the flange is an elongated shaft having one region adjacent the flange having relatively thicker threaded walls and another distal from the flange having thinner unthreaded walls. Two prongs are formed by making cuts in opposing straight sides adjacent to the diagonally opposing arcuate corners, and then bending peripheral portions of the flange including the arcuate corners adjacent to the cuts in a direction upwardly by substantially 90°. The depth of the cuts is such that when bends are made, the perpendicular distance between front surfaces of the two prongs is less than an outer diameter of the shaft. When the fastener is inserted in a piece of material, the prongs dig into the surface of the material to prevent the fastener from rotating when a threaded fastener is screwed into the shaft.

Abstract: A fastener strip with a grip portion, and flanges formed around the grip portion, and a membrane or membranes formed of flexible material, adhesive bonding a membrane to first sides of the flanges, with the fastener in sequential relation along the membrane and portions of a membrane bonded to second sides of the flanges, so that the membrane portions grip the flanges on both first and second side surfaces simultaneously.

Abstract: A Tee-nut strip having Tee-nuts with generally cylindrical internally threaded sleeves, and flanges formed around one end of the sleeves, and a membrane or membranes formed of flexible material, adhesive bonding a membrane to first sides of the flanges, with the Tee-nuts in sequential closely spaced relation along the membrane and, portions of a membrane bonded to second sides of the flanges, so that the membranes portions grip the flanges on both first and second side surfaces simultaneously, and a method of forming a Tee-nut strip with upper and under membranes gripping the flanges on both sides.

Abstract: A tee-nut holder strip of breakable material, and a plurality of tee-nuts having threaded sleeves and flanges, and spikes formed from portions of the flanges and having a strip defining a plurality of precisely spaced apart holes formed axially along the central axis of the strip for receiving the sleeves of the tee-nuts, the holes being undersized relative to the sleeves and displacement of material by the sleeves causing a wedging grip on the sleeves and, strip material located around the holes and the tee-nuts having their spikes penetrating through the material around the holes, thereby holding the tee-nuts in a predetermined precisely spaced apart relationship in the strip of material, the material being breakable between the tee-nuts, to permit punching in of individual tee-nuts one at a time, into a workpiece.