Abstract: A self-tapping screw (10, 30) comprising a drive (12) and a shank (14) bearing a thread comprising a main thread (16, 32), wherein the main thread (16, 32) has a maximum main thread external diameter (DAF) and a cutting area (F) and a supporting area (T) following in the direction of the drive (12), wherein the shank (14) has a threaded end (18) at an end opposite the drive (12), with the screw end (18) having a diameter (DE) of at least 20% of the maximum main thread external diameter (DAF), The shank further has, in the region of the screw end (18), a tap flute (20), wherein the tap flute (20) comprises at least two tapping thread turns (20a, 20b, 20c) which attain, in their external diameter (DAA), no more than 90% of the maximum main thread external diameter (DAF) and form a tap region in which the tapping thread turns (20a, 20b, 20c) have the same diameter development, and in addition in that the diameter of the main thread (16, 32) in the tap flute region (AB) is less than or equal to the diameter (DAA)

Abstract: The invention relates to a screw (IO) in order to cut a mating thread in a plastic article, comprising a lower threaded part (F) and an upper threaded part (T), the lower threaded part having a larger diameter and its tip covering a larger surface than the upper threaded part.

Abstract: Fastening system (1) for fastening an attachment (18) to a substrate (13) with an insulation layer (16), the fastening system (1) comprising an anchor bolt (2), with a first area (3) for anchoring in the substrate (13), a second area (4) to which the attachment (18) can be fastened, and a stop (5), a mounting tool (6) to form an opening in the insulation layer (16), and a sealing element (7) adapted to be disposed at the stop (5) after the mounting tool (6) has been removed and to seal the opening in the insulation layer (16) as well as a corresponding method.

Abstract: A self-tapping screw (10, 30) comprising a drive (12) and a shank (14) bearing a thread comprising a main thread (16, 32), wherein the main thread (16, 32) has a maximum main thread external diameter (DAF) and a cutting area (F) and a supporting area (T) following in the direction of the drive (12), wherein the shank (14) has a threaded end (18) at an end opposite the drive (12), with the screw end (18) having a diameter (DE) of at least 20% of the maximum main thread external diameter (DAF), The shank further has, in the region of the screw end (18), a tap flute (20), wherein the tap flute (20) comprises at least two tapping thread turns (20a, 20b, 20c) which attain, in their external diameter (DAA), no more than 90% of the maximum main thread external diameter (DAF) and form a tap region in which the tapping thread turns (20a, 20b, 20c) have the same diameter development, and in addition in that the diameter of the main thread (16, 32) in the tap flute region (AB) is less than or equal to the diameter (DAA)

Abstract: Fastening system (1) for fastening an attachment (18) to a substrate (13) with an insulation layer (16), the fastening system (1) comprising an anchor bolt (2), with a first area (3) for anchoring in the substrate (13), a second area (4) to which the attachment (18) can be fastened, and a stop (5), a mounting tool (6) to form an opening in the insulation layer (16), and a sealing element (7) adapted to be disposed at the stop (5) after the mounting tool (6) has been removed and to seal the opening in the insulation layer (16) as well as a corresponding method.