Abstract: A self-punching fastener (10), which in a way safe against rotation and pressing out can be pressed into a metal sheet member (40) having an annular body, the side of which facing the metal sheet is having radially disposed projections (15, 25), which, during the pressing-in, are pressed into the metal sheet member (40) and thereby are securing the fastener (10) against rotation, wherein in the centre an interior thread (11) is positioned and, wherein on the side facing the metal sheet member (40) in the set state there is provided an annular depression (12) into which the material displaced during the setting is pressed.

Abstract: A self-locking fastening device which includes a screw or nut for fastening at least one first part to a second part and a shim (10) which is provided with a central borehole (11). The two surfaces of the shim (10) include rib profiles (12,14) which are fixed within or to the surfaces of the first part and the screw or nut no later than the time that the fastening device is tightened such that self-actuated unscrewing is prevented. The shim (10) is configured in a resilient manner such that the shim (10) can be compressed counter to the resilience thereof during tightening of the fastening device.

Abstract: A self-punching fastener (10), which in a way is safe against rotation and pressing out and which can be pressed into a metal sheet member (40) having an annular body, the side of which facing the metal sheet has radially disposed projections (15, 25), which, during the pressing-in, are pressed into the metal sheet member (40) and thereby secure the fastener (10) against rotation, wherein in the center an interior thread (11) is positioned and, wherein on the side facing the metal sheet member (40) in the set state there is provided an annular depression (12) into which the material displaced during the setting is pressed.