An anchor assembly for receiving a fixing member. The assembly may include a shell with a substrate engagement surface. The shell defines a passage configured to receive the fixing member. The passage extends from a trailing edge end of the shell towards a leading edge end of the shell along an alignment axis. There is also provided an engagement member and a resilient member located in the passage. The resilient member is mounted in the passage such that it is fixed relative to the passage and such that an end of the resilient member is moveable with the engagement member along the passage.

A self-drilling expanding anchor bolt, including a drill bit for drilling, an anchor rod connected to the drill bit, and an expanding sleeve surrounding the anchor rod, the anchor rod having an expansion cone at a first end adjoining the drill bit, having a neck region behind and contiguous with the expansion cone, and having a threaded segment at a second end of the neck region remote from the drill bit, wherein the expansion cone expands the expanding sleeve in a radial direction when the expansion cone is pulled into the expanding sleeve; a transition part is provided between the drill bit and the expansion cone of the anchor rod, the maximum diameter of the transition part being smaller than the hole diameter of a drilled hole formed by the drill bit.

In implementations of a pressure lock retention fastener, the fastener assembly includes an insert sized for insertion into a fastener hole in a first panel. The fastener assembly has a threaded collet sized to slide in the insert and has expandable flanges that extend below the insert. The expandable flanges are sized for insertion into an aligned hole in a second panel. The fastener assembly also includes a screw installable through the insert to engage the threaded collet. The screw exerts a force that pushes the expandable flanges outward as screw rotation drives the screw into the threaded collet, and ridge locks of the expandable flanges seat up against the second panel effective to fasten the panels together. In implementations, a plate is installable between the panels with slotted holes having anti-rotation tabs that prevent a fastener assembly from spinning in the panel holes.

A fastener system shifting shear stresses away from a collet body and provides clamping action to targeted structures. The fastener system includes feet in the collet body that mate with openings in a sleeve at least partially surrounding the collet body. The sleeve or the collet body includes interior threads that engage with a stud that is configured to extend through the collet body and bend the feet such that they project outward from the sleeve openings in an engaged configuration.

An adjustable fastener system generally includes an anchor component, a drive component, and a finish head component. The finish head component is threaded onto the anchor component to form the completed fastener that may be adjusted to different heights. The drive component is used to drive the anchor component into position prior to adjusting the finish head component. In some embodiments, the drive component may be used before the finish head component is installed, and in other embodiments, the drive component may be used with the finish head component installed. The adjustable fastener system saves time and effort at a construction site, eliminates the amount of prep work, and eliminates the need to have multiple different fasteners on site. The adjustable fastener system may be used for installing insulation panels over concrete in a roofing system as well as other applications.

An adjustable fastener system generally includes an anchor component, a drive component, and a finish head component. The finish head component is threaded onto the anchor component to form the completed fastener that may be adjusted to different heights. The drive component is used to drive the anchor component into position prior to adjusting the finish head component. In some embodiments, the drive component may be used before the finish head component is installed, and in other embodiments, the drive component may be used with the finish head component installed. The adjustable fastener system saves time and effort at a construction site, eliminates the amount of prep work, and eliminates the need to have multiple different fasteners on site. The adjustable fastener system may be used for installing insulation panels over concrete in a roofing system as well as other applications.

An anchoring device for insertion in a hole provided in a structure such as a wall (hollow or solid) comprises proximal and distal sections. The proximal section includes a head defining an aperture for receiving a fastener, and the distal section includes a pair of expandable wings displaceable between collapsed and expanded positions. Each wing is biased towards its expanded position such that the wings can engage the structural material delimiting the hole or a distal surface of the structure. The distal section comprises, proximally of the wings, a variable-length flexible portion for allowing the wings to engage the distal surface of the structure for various structure thicknesses. The distal section comprises, distally of the wings, a tip section adapted to spread outwardly when engaged by the fastener. The proximal section comprises a pair of legs each having a toothed rack for engaging the structural material.

A fastener is provided. The fastener includes a housing with a housing opening and a collet body at least partially enclosed within the housing, the collet body includes a crown having a crown opening with a threaded section and a leg that extends from the crown and including a foot. The fastener further includes a screw with a head positioned in the housing opening, an upper threaded section, and a lower unthreaded section, where the housing opening and the crown include a set of splined protrusions and a set of splined recesses mated with one another, where the sets of splined protrusions and recesses include ramps and are designed to permit the collet body and the screw to transition into a free-spin configuration, and where a spring is designed to exert a return force on the collet body or the screw when the fastener is in the free-spin configuration.

A fastener is provided. The fastener includes a housing with a housing opening and a collet body at least partially enclosed within the housing, the collet body includes a crown having a crown opening with a threaded section and a leg that extends from the crown and including a foot. The fastener further includes a screw with a head positioned in the housing opening, an upper threaded section, and a lower unthreaded section, where the housing opening and the crown include a set of splined protrusions and a set of splined recesses mated with one another, where the sets of splined protrusions and recesses include ramps and are designed to permit the collet body and the screw to transition into a free-spin configuration, and where a spring is designed to exert a return force on the collet body or the screw when the fastener is in the free-spin configuration.

An expansion anchor is provided, which is fixable in a borehole, including an expansion sleeve for anchoring on a wall of the borehole and including an anchor bolt which is guided through the expansion sleeve and which has an expansion area for expanding the expansion sleeve, the expansion sleeve having a first annular groove on its outside, which extends up to the front end face of the expansion sleeve facing the expansion area. According to the invention, it is provided that the expansion sleeve has a second annular groove on its outside, and that an annular connection piece is situated between the first annular groove and the second annual groove.