Abstract: The invention relates to a screw (1) having a threaded shank (2) and a screw tip (6). The threaded shank (2) is composed of a shank core (10) and a thread which extends helically over the shank core (10). Two flanks (15, 16) which converge in an outer thread edge (14) has a height (H) measured radially from the shank core (10) to the thread edge (14). The thread (12) has a specific apex angle (?) formed between the adjacent flanks (15, 16). Preferably the outer thread edge (14) extends in a wave form in the radial direction with an amplitude (U) between wave crests (20) forming indentations (24) which interrupt the surface of the flank (15/16). At least one of the two flanks (15, 16) of the thread (12) is formed concavely in the region between the shank core (10) and the thread edge (14), seen in radial profile, in such a way that the apex angle (?) is less than a flank angle (?F). With preference, the thread (12) respectively has in the regions that are not interrupted by indentations (24).

Abstract: The invention relates to a countersunk head screw having a head (1), a shank (2) and a thread (3) extending at least partly over the shank (2). The head (1) has a bearing surface (4), narrowing in the direction of the shank (2), and a basic contour (5) which converges at a first angle (?) in a first head section (5a) remote from the shank (2) and at a second, smaller angle (?) in a second head section (5b) facing the shank (2).

Abstract: The invention relates to a screw fastener comprising a threaded shank having a force application means for torque transmission and a screw fastener point. The threaded shank consists of a shank core and a self-tapping thread, and the thread is designed as a prominence which runs helically over the shank core, is defined by two flanks meeting in an outer thread edge and has a radial height (H). The outer thread edge, at least in a section of the thread, runs in a wavelike manner in the radial direction with an amplitude between wave crests having the height (H) and wave troughs having a height (h) reduced by the amplitude.

Abstract: The present invention relates to a self-drilling and thread-forming connecting element, in particular a screw. The screw comprises a threaded shank including a cylindrical core and a thread formed as a protuberance on the core. The screw also includes an end drilling tip for drilling a core hole for the thread.

Abstract: A countersunk head screw is provided. The countersunk head screw includes a head attached to or integrally formed with the shank. A thread extends over a partial region of the shank and a portion of the head includes a bearing surface that tapers conically towards the shank. At least one cutting rib is arranged in a lower region of the bearing surface facing or adjacent the shank. Additionally, at least one restraint rib is arranged in a top region of the bearing surface turned away or spaced apart from the shank.

Abstract: A self perforating (punching) and thread forming connecting element such as a screw having a screw shaft 2 and screw tip 6 which tapers to a pointed end 4 as well as a single or multiple thread 8 which extends at least partially along the screw shaft 2 and along the screw tip 6 to the pointed end 4. This screw tip 6 has an essentially polygonal cross section along at least a partial region of its axial length and the thread 8 is constructed as a radially raised portion which has a helical shape with an outer thread edge 8a which, when viewed in an axial projection, forms a spiral in the region of the screw tip 6 as the radius of the thread becomes smaller and in the region of the screw shaft 2, the outer thread edge 8a proceeds with a constant radius in the form of a circle.

Abstract: The present invention pertains to a thread-forming joining element, in particular, a screw, which comprises a single or multiple thread that extends over at least part of the screw shaft (1), a screw tip (3) and a screw head (2). The thread extends to the point of the screw tip (3), with at least one friction edge region (11) extending over at least part of the length of the screw tip (3) in the longitudinal direction of the screw, namely on the circumferential surface in the region of the screw head (3).