A sealing plug has an elastic sleeve of thimble-like basic shape. A wound-up band of the sealing plug is inserted in the sleeve. The number of windings or turns of the band can be reduced by rotating the inner end of the band, wherein the outside diameter of the band, and hence the outside diameter of the elastic sleeve, widens. The band can be inserted in pretensioned state into the sleeve and can slacken after insertion into an anchor hole. The band can be expanded in the anchor hole beyond the slackened state of the band. The sealing plug further has a latching mechanism, which prevents back-rotation of the expanded sleeve. The sealing plug enables a radial expansion, and hence a sealing of anchor holes of different diameter, without shortening of the axial sealing surface of the sleeve.

A one-sided fastener assembly for use in coupling an assembly stack-up includes a sleeve comprising an outer cylindrical surface and an inner tapered surface oriented at a first angle with respect to the outer surface. The inner tapered defines an opening extending through the sleeve. The fastener assembly also includes a core extending along an axis and configured for insertion into the opening. The core includes an outer tapered surface oriented at a second angle with respect to the axis configured for engagement with the sleeve inner tapered surface such that insertion of the core into the sleeve causes radial expansion of the sleeve creating an interference fit with the assembly stack-up to complete installation of the one-sided fastener assembly.

A wire harness grommet includes a grommet body including a first flared portion, a second flared portion and a narrow portion between the first flared portion and the second flared portion. The first flared portion has a wire receiving opening extending therethrough for receiving one or more wires. A pull handle has a first end located at a first side of the first flared portion and a second end located at an opposite, second side of the first flared portion forming a closed loop.

A box nut retainer system includes a panel configured to receive a fastener. The box nut retainer system includes a plurality of retainer legs extending from the panel. The box nut retainer system includes planar bends positioned at distal ends of the plurality of retainer legs. Straight beams extend from the planar bends. The straight beams have engagement angles relative to the plurality of retainer legs.

A box nut retainer system includes a panel configured to receive a fastener. The box nut retainer system includes a plurality of retainer legs extending from the panel. The box nut retainer system includes planar bends positioned at distal ends of the plurality of retainer legs. Straight beams extend from the planar bends. The straight beams have engagement angles relative to the plurality of retainer legs.

A screw includes a shank where a thread helix receiving groove winds around the shank and is disposed in the shank. A thread helix is disposed in the thread helix receiving groove where the thread helix has an expandable helix section. The shank has, at the thread helix receiving groove, a wedge flank for radially expanding the expandable helix section as the shank is moved relative to the expandable helix section. The expandable helix section has a helical back and a plurality of expansion fingers projecting axially from the helical back towards the wedge flank. The wedge flank of the thread helix receiving groove is configured for radially displacing the plurality of expansion fingers outwardly as the shank is moved relative to the plurality of expansion fingers.

A screw includes a shank where a thread helix receiving groove winds around the shank and is disposed in the shank. A thread helix is disposed in the thread helix receiving groove where the thread helix has an expandable helix section. The shank has, at the thread helix receiving groove, a wedge flank for radially expanding the expandable helix section as the shank is moved relative to the expandable helix section. The expandable helix section has a helical back and a plurality of expansion fingers projecting axially from the helical back towards the wedge flank. The wedge flank of the thread helix receiving groove is configured for radially displacing the plurality of expansion fingers outwardly as the shank is moved relative to the plurality of expansion fingers.

A fixing device for attaching a fastener to a wall, the device comprising a body having a fastener receiving aperture defined therein; and at least two arms pivotably mounted to the body between: a retracted position in which the device is insertable into an opening in a wall from a first side of the wall; and, an extended position in which the arms bear against a second side of the wall to inhibit removal of the device from the opening; in which the arms are configured to be retained in the extended position by a fastener inserted in the fastener-receiving aperture.

A fastener includes an anchor bolt and a nut. The nut has a nut hole and an internal thread. The anchor bolt has an anchor portion and a threaded rod that has an external thread and that is connected to the anchor portion. The nut is arranged on the threaded rod and the internal thread of the nut threadedly engages the external thread of the threaded rod. The nut has a rearward nut section, a forward nut section, and an outside shoulder for load transfer into the nut which is located between the forward nut section and the rearward nut section and which faces the anchor portion of the anchor bolt. The internal thread of the nut extends at least in the forward nut section and threadedly engages the external thread of the threaded rod at least in the forward nut section.

An undercut anchor having an at least partially threaded rod portion having an outer thread diameter D.sub.ROD. The anchor having an expansion feature coupled to the rod portion and an expansion sleeve having an outer diameter D.sub.OUTER SLEEVE, an inner diameter D.sub.INNER SLEEVE and a wall thickness T.sub.SLEEVE. Furthermore, the expansion sleeve has a plurality of circumferentially distributed fingers which are configured to flex outwards when a ramp portion of length L.sub.RAMP of each of the respective fingers is forced against the expansion feature during installation of the undercut anchor. The fingers each having a length L.sub.FINGER and a distance therebetween of W.sub.SLOT.