Abstract: A self-tapping screw made of synthetic material has a threaded shank defining a screw center line. The screw has proximal and distal insertion ends, the shank including first and second portions, the second proximal to the first. The pitch is the same in the first and second portions, and has a complete thread cross-section in the second portion. In the first portion, in the direction of the thread, the thread is divided into segments having an incomplete thread cross-section, the thread segments having leading end and trailing ends. The leading end of one thread segment extends further radially than the leading end of the thread segment preceding it and forms a cutting edge. In most of the thread segments the thread top in question, for substantially its full length, starting with the leading end, considered in thread direction, is situated at a constant radial distance from the center line.

Abstract: Self-tapping screw made of synthetic material having a shank on which a thread is formed, which shank defines a screw center line, —wherein the screw has a proximal end and a distal insertion end, —wherein the shank comprises a first portion and a second portion, —wherein the second portion is situated proximal relative to the first portion, in particular connects to the first portion, —wherein the thread has the same pitch in the first and second portions, —wherein the thread has a complete thread cross-section in the second portion, —wherein in the first portion, in the direction of the thread, the thread is divided into thread segments having an incomplete thread cross-section, —wherein the thread segments have a leading end and a trailing end, —wherein relative to the screw center line, the leading end of the one thread segment extends further in radial direction than the leading end of the thread segment preceding it and forms a cutting edge, characterized in that —in at least the majority of the thread

Abstract: A fastening device of locking press button type includes a first element (1) which in use is present at a substrate and a second element (9) which, to fasten an object (10) to the substrate, can be releasably fastened to the first element by way of a to a snapping part (2) of the first element snapping snapping part (11) of it and wherein the elements (1, 9) remote from their snapping part (2, 11 respectively) have a hooking part (3, 8 respectively) such that the elements (1, 9) first have to be mutually engaged making a mutual angle by the hooking parts (3, 8) and then are pivoted onto each other to subsequently be fixed snapped to each other.

Abstract: A fastening device of locking press button type includes a first element (1) which in use is present at a substrate and a second element (9) which, to fasten an object (10) to the substrate, can be releasably fastened to the first element by way of a to a snapping part (2) of the first element snapping snapping part (11) of it and wherein the elements (1, 9) remote from their snapping part (2, 11 respectively) have a hooking part (3, 8 respectively) such that the elements (1, 9) first have to be mutually engaged making a mutual angle by the hooking parts (3, 8) and then are pivoted onto each other to subsequently be fixed snapped to each other.

Abstract: The invention concerns a fastening device, comprising a first element (1) which in use is attached to a substrate (2) and a second element (5) which, for the purpose of attaching an object (7) to the substrate, can be engaged to interlock with, while remaining capable of being disengaged from, the first element by means of its projection (4; 4a, 4b) that with a gripping edge (8, 10) grips behind a catching edge (3) of the first element (1). Preferably the first and second elements are mutually engaged such that the one element initially is displaced sideways or must be tilted relative to the other element, whereafter the rigid projection can be removed from the first element.