A fastener may include an elongated shank, a head at a distal end of the shank, and a drill point at a terminal end of the shank, which is opposite to the distal end. The fastener may include a primary thread starting at the drill point and extending along the shank towards the head. The fastener may include a secondary thread starting at the drill point, extending along the shank towards the head, and stopping in an axial direction before the primary thread ends. The secondary thread may be radially located 180 degrees from the primary thread. The drill point may include a plurality of radially extending cutting edges and one or more relieved flute portion extending along the surface of the drill point.

A self-drilling screw, particularly for use in a security screen employing leveraged clamping. The self-drilling screw comprises a head and a shank. A drill bit is formed at one end of the shank away from the head with a thread extending along the full length of the shank, including the drill bit. The thread on the drill bit increases holding strength.

A method produces a composite component from a first joining element and a second joining element by use of an adhesive and a flow drill screw. Before attaching the second joining element to the first joining element, a recess is made around the at least one screw position in which the respective flow drill screw penetrates the second joining element, in a joining surface of the second joining element.

The invention relates to a cooking oven comprising at least two entities made of sheet metal (2, 3), each sheet metal entity (2, 3) comprising at least one surface carrying an enamel layer, specifically a vitreous enamel layer, said enamelled sheet metal entities (2, 3) overlapping each other and a screw connection for grounding and coupling said enamelled sheet metal entities (2, 3), wherein a ground element is at least indirectly coupled with one of said enamelled sheet metal entities (2, 3) for grounding said stack of enamelled sheet metal entities (2, 3), wherein at least one screw (5) with a screw shaft (5.1) is provided through said enamelled sheet metal entities (2, 3), wherein the screw (5) is at least indirectly electrically coupled with the ground element and said screw shaft (5.1) comprises a thread for providing an electric coupling between the enamelled sheet metal entities (2, 3).

Electrically assisted flow drill screwdriving processes (EAFDS) and devices are described. The methods can augment traditional FDS and allow for softening of metals of a stack-up, which can enable FDS joining of thicker and stronger materials such as boron steel. EAFDS methods can reduce cycle time and can be used to join thicker cross-sections with reduced installation torque. Also disclosed are fixtures for attachment to existing devices that can provide for the electrical augmentation of existing FDS processes.

A faceted lobular threaded component and methods for making and/or installing the same. A faceted lobular threaded component may include a head, and a shank extending along a longitudinal axis away from the head. The component may also include an external faceted lobular thread in the shank extending around the longitudinal axis. The external faceted lobular thread may include at least four facets per thread revolution, and at least four lobes per thread revolution circumferentially interspersed between the at least four facets and established by the at least four facets.

The present invention relates to attachment mean (1) for connecting plane components in dry construction, in particular for fixing two-dimensional construction material to a metallic substructure, having a shaft (2) on one end region of which a point (3) and on the other end region of which a head (4) are formed, a fine thread (5) being formed on the shaft (2) in order to increase extraction values of the attachment means (1), at least in regions, a number of grooves (6) being provided on the shaft (2) which extend substantially parallel to the central axis (X) of the shaft (2).

A self-drilling, self-countersinking fastener is provided that includes a shaft, a countersunk head located at a first end of the shaft, and a tapered point located at an opposite end of the shaft. A thread integrally extends from the shaft and extends along at least a portion of a length thereof. The countersunk head includes a frustoconical region having a first, smaller diameter in a shaft connection region and a second, larger diameter at a second end defining an edge area of the head. A plurality of radially extending ribs are located on the frustoconical region and extend from an area of the first, smaller diameter to a respective radially outer rib end spaced radially inwardly by a distance X from the edge area of the head. A respective cutting edge is located on each of the ribs.

A flange to be assembled to an end portion of a duct member includes a plurality of pre-fabricated fastener entry areas disposed in an inner wall member, and a plurality of first fastener indicators disposed on an outer wall member, wherein the pre-fabricated fastener entry areas are substantially aligned with the first fastener indicators, each of the plurality of first fastener indicators being sized to guide and each corresponding fastener entry areas being sized to receive a self-tapping screw fastener there through to fasten the wall members to the end portion of the duct member. The fastener entry areas and correspondingly aligned fastener indicators, respectively, may be spaced apart such that the fasteners can be inserted at regular intervals along the length of the flange and the length of the end of the duct member.

A self-tapping screw includes a shank having a rear end provided with a drilling tip and an external thread. The external thread has a top formed with a stop flange. The stop flange has a diameter greater than that of the external thread. Thus, the shank is integrally formed with the stop flange by two threading dies, to stop a further movement of the external thread, and to prevent the external thread from being fed and locked excessively, thereby preventing the shank from being worn out or broken during operation.