Abstract: A spiral member for improving the grip of screws in wooden or other receptive substrates is disclosed. The spiral member has a central axial drive pin by which it can be driven into a thread in the receptive substrate, and it has an improved cross section providing wings or protuberances extending out past the side surfaces of the cross section. The spiral member also has an outwardly facing triangular apex which bites into the old thread while the wings bear upon the flanks of the screw thread of the screw that inserted into the spiral member, thereby improving the grip.

Abstract: This invention presents to the art a novel, improved plastic nozzle cap for a compressible tube having a sealed outlet opening. The novel, improved nozzle cap comprises an outlet bore and means for securing the cap to the tube. The outlet bore is positioned in a predetermined relationship with the outlet opening of the tube to which the cap is to be secured so that when the cap is secured to the tube, a device can be inserted into the outlet bore to pierce the sealed outlet opening of the tube. The device used to pierce the sealed outlet is an integral part of the cap but can be readily broken from the cap. The broken off device has a portion dimensioned and shaped so that the device has the capability for piercing the sealed outlet opening of the tube and for closing the outlet bore.