Abstract: A self-drilling blind tension rivet has a sleeve with a stop flange and a rivet shank and having at one end a drilling unit and at the other end a flattened section for engagement with a rotation and tension applying tool for drilling in and setting the blind tension rivet. The flattened section which extends over the major part of the length of the shank has roughened surfaces formed by transverse ribs and is limited by two elongated portions protruding radially beyond the outer diameter of a cylindrical part of the shank.

Abstract: The invention pertains to a fastening element consisting of a screw (5) and a metallic washer (6) to attach insulation sheeting, and possibly additional waterproof sheeting onto a solid substructure, whereby the screw is provided with a drill tip (7), a shaft (9) with threads (8), and a screw head (10). The washer is provided with a central aperture (12), whereby this aperture (12) is smaller than the outer diameter of the thread, but at least equally as large as the core diameter of the threaded area of the shaft (9). The washer (6) is at a distance from the screw head (10) preassembled in such a way that it is secured against axial movement in the threaded area of the shaft (9) (FIG. 3).

Abstract: A device for screwing-in and setting self-drilling blind rivets in a structure, has a clamping unit with two clamping jaws for holding a spindle of a rivet inserted therebetween. The jaws are guided in complementary grooves provided in a retaining unit which is installed in a tubular housing. A cover cap is inserted in the housing for limiting a displacement path of the retaining unit and the clamping jaws in a direction of a central axis of the retaining unit. A shaft to be connected to a driving unit for driving the screwing-in and setting device is inserted in the retaining unit. The shaft acts on a spring-loaded support having radially protruding bolts slidable in longitudinal slits provided in the housing. A displacement path of the retaining unit in the direction towards a free end of the housing is longer than that of the clamping laws.

Abstract: A rivet fastener has a rivet housing and a shaft threaded into the rivet housing. The shaft has a head formed at a distal end thereof and being of a greater diameter than the threaded portion of the shaft. The head of the shaft supports a drilling element. The rivet housing is formed of two sections along the axis thereof, of which one section is of a greater diameter than the other one. The section of the greater diameter forms a borehole diameter of the drilling element.

Abstract: Fastening element for mounting insulating strips or plates on a solid structure includes a large-surface washer, a tubular extension and a locking member which is mounted to an end portion of the fastener and protrudes into the extension so that the fastener and the tubular extension form two telescopic elements movable relative to each other. The two telescopic elements can be adjusted and locked relative to each other in a desired position due to the provision of interengaging ribs, grooves or corrugations formed on the telescopic elements.

Abstract: A self-drilling connecting unit includes a shaft and a platelet-like cutting tool attachable to the shaft in a form- and/or force-fitted manner. The platelet-like cutting tool has a platelet-like protrusion lying in the plane of the cutting tool in its end region facing the shaft. The end region of the shaft, which bears the cutting tool, has a central opening. The protrusion of the cutting tool is insertable into the opening of the shaft and is braced by a pressure seat in the opening against two diametrically opposed boundaries of the inner wall of the opening whereby a sufficient mount and an exactly axis-parallel alignment of the cutting tool against the shaft are provided.

Abstract: A rivet fastener includes a threaded spindle having at a free end thereof a drill bit and an external casing having a stop flange and a sleeve portion with an internal thread corresponding to that of the spindle and receiving the spindle. The casing has a plurality of set-breaking grooves extending parallel to the axis of the casing. The threads and the drill bit are formed such that the threads run in a direction opposite to that of a drilling rotation.

Abstract: A fastening assembly for securing insulating sheetings or boards to a solid base has a tubular extension secured to a large surface washer at the top end thereof, a nut securely held against rotation in the interior of the tubular extension and an elongated fastener inserted at its top end in to the tubular extension and locked by the nut and which is engaged at its lower end which has a bulge, in the solid base.