Abstract: A convertible anchor (H) for friable walls (W) comprises a fixture (12) for holding an article to a wall (W, M) and an anchoring mechanism (10) extending from the fixture (12). The anchoring mechanism (10) is adapted when rotated to engagingly extend into a friable wall (W) for securing the fixture (12) to the wail (W). The fixture (12) is selectively separable via frangible connection elements (14, 24) from the anchoring mechanism (10) for allowing the fixture (12) to be used alone with an appropriate fastener (S) suitable for installing the fixture (12) to a rigid structure (M), such as wooden components. The anchoring mechanism (10) can take different forms as long as it is can be mounted to a friable wall (W). Typically, a space (26) is defined between the fixture (12) and a proximal end (34) of the anchoring mechanism (10) with this space (26) being bridged by the frangible connection elements (14, 24).

Abstract: A bolt device includes a bolt and a jacket. The bolt includes in sequence a threaded section, an enveloped section, a neck portion, and a tool-coupling end section. The tool-coupling end section includes an end face for coupling with a tool to screw the threaded section into a first piece of lumber. The jacket is mounted around the enveloped section, the neck portion, and the tool-coupling section. The jacket includes a first hook in an area in alignment with the neck portion of the bolt. The jacket and the enveloped section, the neck portion, and the tool-coupling section of the bolt are adapted to be driven into a second piece of lumber, with the first hook in frictional contact with the second piece of lumber.

Abstract: An accident sensor having a fastening arrangement is provided, the fastening arrangement allowing an affixation of the accident sensor on a wall in a vehicle. The accident sensor has at least one bore hole, which has a stud in an elastic sleeve as a fastening arrangement. The stud with the sleeve is configured so that the accident sensor having the stud with the sleeve is affixed in the wall by a clamp.

Abstract: The present invention discloses a self-piercing element, that can be fastened to a structural component by means of piercing and beading. Additionally, the present invention discloses an apparatus for seating the self-piercing element and a corresponding method. The self-piercing element comprises a functional head, a seat geometry and a cutting geometry, while the cutting geometry has a radially outwards arranged, centering exterior bevel, a radially inward arranged interior bevel and a cutting edge arranged in between.

Abstract: A cable thread insert, the insert integrated into a multiwire cable to provide a threaded portion of the cable. The threaded cable is capable of being used as part of a tensionable cable bolt apparatus and system.

Abstract: An alignment assembly comprises an outer bushing received in an aperture of a work piece, and an eccentric bushing received in a passage of the inner bushing and rotated to align a passage of the eccentric bushing with passages of other work pieces and/or alignment assemblies. An alignment assembly comprises an outer bushing received in an aperture of a work piece, inner bushing received in a passage of the outer bushing, and an eccentric bushing received in a passage of the inner bushing and rotated to align a passage of the eccentric bushing with passages of other work pieces and/or alignment assemblies mounted in other work pieces. Flanges and/or ends may be machined to accommodate off-center passages. The bushings may be secured via cold work expansion.

Abstract: Objects of the present invention provide a multi-use anchor and system for setting the same. One embodiment of the present invention is directed to a multi-use anchor including a bolt, an elastomeric sleeve fitting over a threaded portion of the bolt, and a receiver arranged to couple to the bolt, where tightening the receiver on the bolt compresses the elastomeric sleeve such that the sleeve radially expands to engage a hole in rigid substrate material.

Abstract: The invention provides a “change of direction” device for use by a law enforcement technician. The device can be readily and easily attached to a building element and will allow the technician to pass a rope, wire or cable therethrough so that the rope, wire or cable can be pulled by the technician after one end has been attached to a hazardous item of concern. The change of direction device (CODD) would be positioned within the building at strategic locations where it is clear that the item of concern will have to change directions as it is being pulled from the location at which it was found. The invention provides several embodiments of the CODD for attachment to a wall, to a door hinge, or under the bottom edge of a door. Each CODD is simple in construction and is of such a nature that it can be positioned at the desired location without any preparation having to be done. In the case of the door and hinge CODD's they can be removed at a later point in time for re-use if necessary.

Abstract: An expansion bolt. A first chock has first and second outer ramping surfaces. A second chock has an inner ramping surface complementarily corresponding to the first outer ramping surface. A spring member biases the second chock radially inwardly against the first outer ramping surface of the first chock.

Abstract: The invention relates to an anchoring arrangement (1) having an anchor rod (2) which is anchored with mortar (3) in a bore (4) in an anchoring substrate (5) (concrete). The anchoring arrangement (1) is crack-resistant when the following conditions are fulfilled: bore ? ? diameter diameter ? ? of ? ? anchor ? ? rod * bond ? ? stress ? 14 ? N mm 2 ? ? and ( I ) 0.4 ? diameter ? ? of ? ? anchor ? ? rod bore ? ? diameter ? 0.85 .

Abstract: A method of installing a self drilling anchor for use in a friable material mounted on a member comprising an elongated body having an axis, an axial bore adapted to receive an elongated fastener, a flared end having torque transmitting surfaces therein, a proximal portion, an intermediate portion, a distal portion, and a drilling tip generally opposite the flared end, wherein the proximal portion has a threaded exterior having a root, a crest diameter, and a thread height, the intermediate portion has a threaded exterior having a root, a crest diameter substantially smaller than the crest diameter of the proximal portion, and a thread height substantially smaller than the thread height of the proximal portion, and the distal portion has a threaded exterior with a root that tapers toward the drilling tip, a crest diameter substantially smaller than the crest diameter of the proximal portion, and a thread height substantially smaller than the thread height of the proximal portion.

Abstract: A rivetless nut plate has a nut, a holding bracket, a member and a nut retainer. The nut is provided with an aperture therethrough and is secured within a bracket portion of the holding bracket by the retainer but also is permitted limited movement within the bracket portion. The holding bracket further includes a tubular portion having inner and outer walls. The inner wall is tapered such that the member is positioned against the inner wall. Upon an axial force being applied to the member through the aperture of the nut, the member is pushed through the tubular portion from the first end to the second end in order to expand the inner wall and force the outer wall into engagement with the wall of the workpiece. A tool is provided to push the member through the tubular member and can be incorporated into either a manual or automatic process.

Abstract: The invention provides an installation tool for use with a battery operated drill or a corded electric drill for repetitive installation of caulk-in anchors. The installation tool utilizes the mechanical advantage of a threaded shaft to improve consistency of the holding reliability of the caulk-in anchor and controls the anchor setting process to insure proper installation while reducing installation time. The installation tool does not rely on bottom setting or a hammer strike to set the anchor, but can be set at a depth independent of hole depth. In one embodiment, the tool can be used with a through hole in the substrate and uses a combination of a threaded shaft and a controlled sensing spring to insure a more uniform installation of the anchor within the substrate across the entire length of the sleeve portion of the anchor, along with a visual check of proper setting of the anchor.

Abstract: An expansion bolt includes a sleeve in which a central bore is defined, comprising a rear inner-threaded section and a front tapering section. Radial slits are defined in a front end portion of the sleeve and partially in communication with the tapering bore to form a plurality of deformable pawls. At least one spherical member is received in the tapering bore and has a diameter greater than a smallest diameter of the tapering bore whereby the spherical member is effectively retained in the tapering bore. A driving member having external threading is threadingly received in the threaded bore for axially engaging the spherical member. By screwing the driving member, the spherical member is forced toward the front end of the sleeve and due to the tapering configuration of the tapering bore, the movement of the spherical member toward the front end of the sleeve forces the pawls to deform outward in a radial direction thereby securing the expansion bolt in a hole defined in for example a wall.

Abstract: A dowel bolt is formed of a bolt (1) and has at the trailing end an outer thread (2) and on the leading end an expansion head (3) expanding in the setting direction (S) and an expansion sleeve (4) that can be expanded by the expansion head (3). At the trailing end face (15) directed away from the setting direction of the bolt, the bolt has at least one peripheral recess (16) with a depth (t1) providing a setting control and that can be economically manufactured.

Abstract: A method of securing a screw-receiving plug in an over-sized hole preformed in a fixture comprises the steps of: (a) providing at least one piece of a loosely-woven fabric carrying consolidated thereon a quick-setting filler material, which fabric piece is sized to envelop at least circumferentially the plug intended to be used; (b) enveloping the plug circumferentially in the fabric piece; (c) activating the filler material; and (d) inserting the enveloped plug in the hole in a manner such as to ensure filling of the hole by the enveloped plug. On setting, the activated filler material and fabric restrain the plug against rotation when a screw is being driven into the plug thereby to secure the screw in the fixture. The preferred filler material is plaster of Paris.

Abstract: The invention relates to a fastening device for holding together a stack of at least two panels, comprising a female piece in the form of a clasp, and a male piece having a part in the form of a head, and a part in the form of shaft with a cross section in the form of a cam which can be axially inserted into the clasp. The device includes a component for immobilization of the male piece in the female piece which is connected with clasp and is produced in the form of finger which can be moved by deliberate action between a position of engagement in a notch of the head of the male piece, and a position of disengagement from said notch.

Abstract: An expansion bolt. In a preferred embodiment, the expansion bolt includes a center chock having either a convex or a concave outer ramping surface and two outer chocks disposed about the center chock having complementarily concave or convex outer ramping surfaces.

Abstract: A locating and/or retaining device comprised of a locking pin 1 a flexible flanged dowel pin 2, a spring 3 and a feature and/or washer 4 for use in a wide array of applications where locating and/or retaining/clamping are required.

Abstract: An anchor assembly includes an anchor bolt equipped with an anchor socket pressed into a concrete hole and screwed into the coil spring from an opening at one end of the anchor socket, thereby facilitating the anchor assembly's operation. The anchor socket includes a coil spring for fixing and fastening the anchor bolt. The anchor socket is provided with a slope portion having an inner wall, the diameter of which is gradually contracted toward the end portion thereof. The end portion has a plurality of slits formed through the socket in the longitudinal direction.

Abstract: A fitting for connecting two structural components, particularly plates, includes a clamping device mounted in the first structural component and an expanding sleeve which can be secured to the second structural component. A bolt is arranged in the expanding sleeve so as to be longitudinally movable by the clamping device for expanding the expanding sleeve using a conical portion of the bolt. The conical portion of the bolt is an approximately cone-shaped projection whose longitudinal axis is laterally offset relative to the longitudinal axis of the bolt.

Abstract: An obturator (1) for an opening has a collar (2) having a peripheral lip (3) adapted to come into abutment on a face of the opening. The obturator also has teeth (6) pivotally mounted on the collar (2) and a central portion forming a pusher (8) adapted to pivotally move the teeth (6) between an unlocked position and a locked position of the obturator (1), so that the teeth (6) come into an abutment on an opposite face of the opening in the locked position of the obturator (1).

Abstract: An expansion assembly configured to be attached to a mine roof bolt, wherein the expansion assembly may include a plug defining an interior cavity and an outer surface and an expansion shell having a plurality of spaced-apart prongs, preferably three prongs, and defining a plurality of shell grooves, wherein each of the spaced-apart prongs is oriented diametrically opposed to a corresponding shell groove.

Abstract: A connection device including an expander sleeve (1) which has slots (10) extending axially over a partial region, and an expander cone (3) which is introduced in the region of the slots (10) into the expander sleeve (1), is designed so that the expander cone (3) is connected by a form-fit or friction-fit connection to the expander sleeve (1) before the connection device is mounted.

Abstract: An expansion anchor to be set in a bore of a constructional component and including an anchor member (1) having, at its end facing in a setting direction, an expansion region (5), a guide region (6) remote from the setting direction end of the anchor member (1), and a transition region (8) located between the expansion (5) and guide (6) regions and having at least one opening (10) and at least one salient tab (12) provided in a region of the opening; and a cone (3) for expanding the expansion region (5) of the anchor member (1)

Abstract: A rigid bar of material is fastened to a circuit board to increase its stiffness. The bar is preferably a high modulus plastic such as liquid crystal polymer. Flexible fingers which surround a central opening are formed integrally with the bar and pop into throughbores in the circuit board. Each finger has at least one arcuate protrusion and, preferably several, which can engage the bottom of the circuit board. A rigid pin which may be made of steel is slid into the central opening and has an interference fit therewith to hold it in place to prevent flexible fingers from moving inwardly so the stiffener is held fast to the circuit board.

Abstract: An arrangement for fixing a tubular element, such as a shaft, that is provided with a bore and a flange in position with respect to plate element involves the use of a ball that pressed into the bore in the tubular element. To achieve a simple fixation that is secure in both axial directions, the plate element is fixed on one side by the flange of the tubular element and on the other side by the bulge that is created through insertion of the ball into the bore in the tubular element. The ball has a greater diameter than that of the bore in the tubular element so that insertion of the ball into the bore causes the tubular element to become enlarged, thus forming the bulge.

Abstract: A system for reinforcing a sandwich panel, the panel having a first exterior skin, an intermediate skin and a second exterior skin, the skins being separated by first and second cores and having a hole bored therethrough of diameter A, the holes in the first and second exterior skins being enlarged to a diameter B, the system including a first tubular sleeve that is insertable into the hole in the first exterior skin and being of a length substantially equal to the spacing between the first exterior skin and the intermediate skin, a second tubular sleeve that is insertable into the hole in the second exterior skin and being a length substantially equal to the spacing between the second exterior skin and the intermediate skin, the first and second sleeves each having a diameter greater than A and slightly less than B, a bolt insertable through the tubular sleeves, the bolt having a head that contacts the exterior surface of the first exterior skin, first and second flare washers positioned on the bolt, one eng

Abstract: An anchoring sleeve for receiving a screw in a concrete building element, consists of a tubular body (1) made of synthetic material and surrounded by a metal shell (8) which only partially covers the synthetic body (1) so that at least the lower end thereof is exposed and can be destroyed by dissolving or perforating it so that water can flow through.

Abstract: A stone facing section anchor mounting system has a special hole configuration, in facing stone, that will not rotate while being installed, and because of its installed angularity and pressure points will not tend to rupture or pull out of the stone. The anchor system holds beyond the lateral strength of the stone itself when the stone is at the cracking point. The superior holding power of the present anchor and its minimum edge distance eliminates the kerf and aluminum "J" structure and silicone used with other anchors, and while having the advantage of being hidden it also has the holding power of a through bolt. Fan nut anchor holes in facing material are made with ease to tolerances required. The anchors do not rotate during installation and use a lock nut that does not work loose in transit and the anchor is such, with accurate hole predetermined angularity that installation can be made without over tightening occurring.

Abstract: In an expansible fixing plug having an internal bore passing right through the plug body into which an expansion bolt in the form of a nail or screw is to be driven, the internal bore is arranged helically wound around the center line and at least for a part of its length has a diameter that is the same as or slightly smaller than the outer diameter of the expansion bolt.

Abstract: A friction clutch having tangential leaf springs which are fastened by means of blind hole rivets, on one hand to the pressure plate, and on the other hand to the clutch housing, whereby the blind hole in the pressure plate is conical.

Abstract: A clip includes a female member having a cylindrical body having a hole with an expanded engaging portion around an inner surface at an upper end opening of the hole, spreadable legs formed by dividing a lower end portion of the body, and a flange extending outward from a peripheral surface at an upper end portion of the body, and a male member that is inserted into the female member, the male member comprising a head portion, a shaft vertically descending from an underside of the head portion, and an engaging recess formed around a periphery of a lower end of the shaft that can receive the expanded engaging portion of the female member to maintain the male and female members in a provisionally assembled state.

Abstract: A dagger-like anchor drivable into a hollow wall and adapted to receive a fastener screw to hold an object adjacent the wall. The anchor is fabricated from a sheet metal blank, shaped, folded and hardened to define a head having a hole to threadably receive the screw, and a pair of normally juxtaposed flat blades aligned with the hole and extending from the head, the blades terminating in triangular sections coming to a point to penetrate the wall. The blades are each provided at offset intermediate positions with a tab that projects through a complementary slot in the other blade. When the anchor is driven into the wall so that its head lies against the outer surface of the wall, and the fastener screw is then inserted in the hole and turned to advance between the blades, the screw acts to spread the blades and their tabs apart.

Abstract: A multi-part fastener assembly for attaching a first apertured member such as a valve cover to a second member such as a cylinder head, comprising an elongated threaded fastener, a tubular sleeve encircling the threaded fastener, and a rubber grommet encircling the sleeve. The grommet's outer surface is cylindrical for facilitating its insertion through the valve cover's aperture. However, a bead formation created on the grommet's inner surface is engaged upon insertion of the sleeve member through the grommet to cause the lower edge portion of the grommet to be biased radially outward in a manner which secures the sleeve and grommet in the aperture. In addition, the sleeve's upper end portion has a surface extending obliquely to the axis of the sleeve so that when pressed against the grommet by tightening of the fastener the rubber grommet material is distorted outwardly.

Abstract: This invention is directed to a new and simplified method of installing a vehicle window glass in the glass carrier or regulator of a vehicle. By this method the glass can be mounted more securely and in considerably less time than has heretofore been required. A flat washer shaped member, preferably formed of nylon, and having a central aperture and a plurality of circumferentially spaced axially extending angular projections partially overlying the central aperture and having humps at about the mid-section of the axially extending surfaces have become known as "window things", because they do so many good things so well. The inner ends of the axially extending members are of slightly less diameter than are the precut internal diameter of the holes in the replacement window. These members, being formed of nylon, will deflect inwardly sufficiently to permit the slightly enlarged humps of the "window things" to be snapped through the precut holes in the replacement windows.

Abstract: The expansible plug has an expander body at one end of a plug shank and an expansible sleeve which slids over the expander plug in operation. A sliding ring is often provided between the expander body and the expansible sleeve to improve the sliding properties of the expansible sleeve over the expander plug. To prevent slippage of the sliding ring off the expander plug, the sliding ring can be provided with an interlocking inner profile which engages in an outer thread or a plurality of annular steps on the outer surface of the expander body. The expansible plug can be used to attach objects to a masonry wall by inserting the expansible plug into a drilled blind hole with the expander body at the base of the hole and a fixing means which may include a threaded portion on the shank protruding from the hole.

Abstract: The invention relates to component connecting fastener especially flange connecting fasteners for the propeller shaft in a motor vehicle. The two flanges 4, 5 contain bores 8, 9 which align with each other. Axially slotted tensioning sleeve 10 is introduced into each bore 8, 9. The tensioning sleeve 10 is axially elongated and radially expanded by tensioning pin 22 driven into bore 12. After completion of the assembly operation, contact face 17 provided at collar 16 is supported on contact face 18 of flange 4, with supporting face 20 being supported on abutment face 21 of further flange 5. In this way it is possible to automate the assembly procedure while requiring less space and achieving a higher compression between flanges 4, 5.

Abstract: An anchoring assembly for use in a hole bored inwardly from the surface of a receiving material. The anchoring assembly includes, in general, an anchoring component or swedge anchor having a plurality of fingers, a spreading component or spreader having a tapered portion which points toward the anchoring fingers, a bolt or threaded shaft onto which the spreader and swedge anchor are positioned, and structure for interlocking the anchor and spreader together during the procedure for setting the assembly into a receiving material.

Abstract: Detachable device for joining together objects having holes intended to come into alignment, comprising:a tubular member made of an elastically deformable material and capable of passing through the holes when it is in the expanded state and of widening in order to be locked in the holes,an expansion rod sliding inside the tubular member and having a widened head,a body fastened to the tubular member and having a bore which extends the bore of the tubular member, and a support surface substantially at right angles to said bore,a locking member which can be immobilized at any point on the rod,an elastic member capable of exerting a determined force tending to move the body away from the locking member.The tubular member, the body and the elastic member preferably form a single piece.

Abstract: A fastening system is provided which includes an elongate grommet affixable into a correspondingly shaped aperture in a first object to be retained therein, and a clip passed through an aperture in a second object to be fastened to the first object. The two objects, one with the grommet affixed therein and the other with the clip projecting therethrough are brought together and, in a first orientation of the clip with respect to the grommet the clip is forcibly pressed into the grommet, whereupon a pair of claws formed onto the shank of the clip engage in an interference fit with recesses formed for such engagement into opposite walls of the grommet. The clip has a maximum transverse dimension smaller than an inside dimension of the elongate grommet, so that a predetermined amount of relative motion between the fastened objects is permitted by sliding motion of the clip while in interference engagement with the grommet.

Abstract: An expansible plug for anchoring in conical inwardly expanding drilled holes comprises multi-slotted expansion anchor having an inner opening with a cylindrical part, and an expander body having a bearing slope and a pin engaging in the inner opening of the expansion anchor, the inner opening of the expansion anchor having a front end provided with a funnel, a conically expanding first portion adjoining the funnel and a second portion having a length corresponding to the length of the first portion and reducing to a diameter of the inner opening. The bearing slope of the expander body rests in the funnel of the inner opening of the expansion anchor and is held by a peg clampingly engaging in the cylindrical part of the inner opening.

Abstract: A pin and grommet assembly includes a push-pin and a grommet of unique construction which is capable of absorbing variations in the relative positions of a supporting panel and a mating panel to be attached caused by thermal expansion and contraction. A pair of diametrically opposed semicylindrical-shaped portions are disposed on the push-pin and cylindrical-shaped mating grooves are formed in the interior of the grommet for retaining freely floating the semicylindrical-shaped portions in the grommet so as to permit lateral sliding engagement between the opposed outer wall surfaces on the shorter sides of the main body portion of the grommet.

Abstract: A replacement fastener for use with a female snap member to provide a snap fastener. The male snap member is formed of an acetal resin which is tough and resilient and has its own self-lubricating properties. The male fastner has a flange with a button on one side adapted to engage in the socket of the female snap and has an anchor portion adapted to be firmly anchored in a boat structure in the precise location where the conventional male fastener was located.

Abstract: The disclosure relates to a grommet for relatively soft panels comprising male and female elements that mechanically interlock with one another. The male and female elements having complementary truncated conical surfaces that pinch and deflect a flanged portion of the skin of the panel into a complementary annular rib and groove thereby to fasten and minimize creep of the skin relative to the grommet. The male and female elements of the grommet are positively locked to one another by a relatively simple assembly operation.

Abstract: An apparatus comprising a sleeve insertable into a borehole, the borehole having a first diameter. A roof pin is inserted into the sleeve, the roof pin having a second outer diameter which is less than the first diameter. The outer surface has a peripheral dimension prior to insertion of the sleeve into the borehole. The inner or the outer surface contains at least one longitudinally extending yieldable channel portion which is of a lesser sleeve thickness than the remainder of the sleeve, permitting circumferential expansion of the sleeve. Expansion of the sleeve establishes a restraint between the roof pin and the borehole. When the sleeve is expanded within the borehole, continuous peripheral contact is made between the outer surface and the borehole.

Abstract: An anchor assembly capable of being inserted in a hole in a substrate. The assembly includes a sleeve and a screw. The sleeve includes a top end, a body portion, and a bottom end. The sleeve includes at least one feeler prong adjacent the top end, and preferably a tip portion adjacent the bottom end. The anchor assembly may be inserted into a hole in the substrate. The feeler prong(s) enable the installer to known whether the sleeve has been inserted properly into the hole, and the tip serves to push dust away from the bottom of a hole to insure optimum penetration of the sleeve into the hole, as well as insuring full penetration of the screw into the sleeve.

Abstract: An improved expansion assembly for a mine roof bolt adapted for use in a 11/2" diameter bore hole with a 1" roof bolt. The expansion assembly has a plug with tapered surfaces, an expansion shell with leaves extending axially upwardly from a support ring into contact with the tapered surfaces of the plug and a support washer. The inner surface of the expansion leaves are spaced inwardly from the surface of the support ring. The expansion leaves have serrations on their outer surfaces such that the serrations are formed by the intersection of a planar surface perpendicular to the axis of the mine bolt and a frusto-conical surface. The end of the leaves on the expansion shell have vertical serrations parallel to the longitudinal axis of the leaf. The tapered plug has channels running longitudinally between the surfaces on the plug for facilitating use of the expansion assembly with resin. The improved expansion assembly may be utilized with or without resin bonding.

Abstract: The fixing element for anchoring in a hole drilled in a concrete part includes a threaded bolt, an expansible body with an expander cone and an expansible sleeve having an internal bore. The expansible sleeve has longitudinal slots extending from its front end and the expansible body is joined to the threaded bolt for expansion in the drilled hole. To ensure that the fixing element can continue to at least partially hold after experiencing a sever excessive stress such as occurs during an earthquake, the internal bore (14) of the expansible sleeve (11) has a first cylindrical portion (14a) in its front end, which has a length corresponding approximately to the length of the expander cone (5) and the diameter of the first cylindrical portion (14a) corresponds to the smallest expander cone diameter.

Abstract: A fastening element is set in a receiving material, such as concrete, stone and the like, by driving it through the base of a blind borehole previously formed in the receiving material. When the fastening element is driven initially, it moves through a sleeve and expands and secures the sleeve in the blind borehole. Accordingly, the fastening element is fixed in the receiving material and is also secured by the sleeve in the range of the borehole in the receiving material. A fastening element assembly made up of a fastening element and a sleeve can be used.