Abstract: A threaded installation is provided. The threaded installation includes a nut, a bolt, and a housing. The housing includes a threaded hole. A first threaded connection is formed where the bolt is threadably coupled with the nut, and a second threaded connection is formed where the bolt is threadably coupled with the threaded hole. The first threaded connection is characterized by a first flank angle, ?2A, of threads of the bolt or threads of the nut. The second threaded connection is characterized by a second flank angle, ?3B, of threads of the bolt or threads of the housing. The flank angles, ?2A and ?3B, satisfy the following equation: k 2 = cos ? ( ? 2 ? A ) cos ? ( ? 3 ? B ) > 1 . 0 ? 0 .

Abstract: A coupling bolt or pin, in particular a ball pin, with a coupling head, such as a ball head, and a thread shaft. The thread shaft comprises a thread in a longitudinal portion of the thread shaft, which extends parallel to a central longitudinal axis of the thread shaft. Within the longitudinal portion of the thread a thread inhibition is provided by means of which a frictional connection between the thread and a counter thread engaging therein and being present at a radial inner wall of a thread opening is increasable. A disc-shaped support structure is provided between the coupling pin and the thread, a radial extension of which is adaptable to a diameter of the thread opening so that the coupling pin is supportable against a lateral load with respect to the axis of the coupling pin within the thread opening.

Abstract: A multifunction drill bit includes an outer shank including an outer lock head, an outer shank body, and an axial hole wherein spiral grooves are on the outer shank body; from a joining portion of the outer shank body and the outer lock head to the outer lock head, a threaded section, a deformable section, and a guide section are provided; each of the threaded and deformable sections include first external threads; the deformable section has outer curved grooves; a deformable concave surface is on an inner surface of the deformable section; and first internal threads are on the guide section; and an inner shank in the axial hole and including a top socket, an inner lock head, and an inner shank body. Second external threads are on an inner surface of the guide section corresponding to the first internal threads. A tip of the drill bit is replaceable.

Abstract: An assembly includes a threaded hole, a threaded fastener, and a locking compound. The threaded fastener is positioned in the threaded hole with a portion of fastener threads mated with a corresponding portion of hole threads. The locking compound is between the mated fastener threads and hole threads. The locking compound includes an aluminum pigmented compound suspended in a water-based inorganic binder.

Abstract: A drill bit assembly has a bit head and a pin body. The bit head comprises a cutting end, an opposite connecting end with an engagement section, and a feature facing the connecting end. The pin body comprises a tubular body with an axial bore therethrough, a connecting end with an engagement section and a feature facing the connecting end. The drill bit assembly is manufactured by positioning the pin body connecting end with the bit head connecting end such that the pin body and bit head engagement sections overlap with a gap therebetween, and the pin body and bit head features are aligned; injecting a thermoplastic or other connecting material in liquid form between the bit head and pin body engagement sections and into the gap; and solidifying the thermoplastic or other connecting material such that the bit head and pin body are mechanically coupled together at their connecting ends and their features are securely aligned.

Abstract: An apparatus and method for fastening cementitious components together or for fastening a cementitious component to a non-cementitious component to form a structure. In a preferred embodiment, the apparatus is a screw having a hollow shaft from which threads protrude and a tip comprising a plurality of drilling teeth or a plurality of thread members that surround said central space, each of said thread members forming a two-dimensional spiral. In use, the invention is operated by screwing it into the cementitious components and then injecting an adhesive into the void created by the screwing step.

Abstract: A connection insert includes a central adhesive supply channel and outlets which are perpendicular to the channel. The connection insert consists of a plurality of parts, and comprises an inner part provided with the adhesive supply channel and an outer sleeve that can be at least partially inserted into a borehole of a component.

Abstract: A dry-to-the-touch moisture curing composition useful as a sealant and adhesive which includes a reactive modified methylene diisocyanate polymer component having isocyanate functionality of about 8% to about 18% by weight of the polymer.

Abstract: A threaded anchor for concrete metal deck floors includes a hollow plastic sleeve having an internally threaded top portion, a flared top end forming several outwardly-extending fingers, and a bottom end. A threaded bolt has a head end and a shaft with external threads mating with the threads of the hollow plastic sleeve. The shaft of the bolt includes internal threads having at least two different diameters. A nut is threaded to mate with the external threads on the bolt. In use, the assembled insert is punched in place through a hole formed in a metal deck layer. The fingers of the plastic sleeve collapse as the assembly is passed through the hole and expand below the deck. The nut is then tightened against the top of the deck to hold the insert in place.

Abstract: A fastener may include a shaft and a head. The shaft may have first and second opposing ends and a first surface having a first diameter. The head may be attached to the first opposing end of the shaft. The head may have a second surface comprising a second diameter which is larger than the first diameter. The head may have a third surface extending between the second surface and the first surface. The third surface may be defined by a relief slot extending from the second surface to at least one of near and to the first surface. The relief slot may be for providing a relief path to reduce pressure during installation, using a viscous compound, of the fastener to a member.

Abstract: A connection insert includes a central adhesive supply channel and outlets which are perpendicular to the channel. The connection insert consists of a plurality of parts, and comprises an inner part provided with the adhesive supply channel and an outer sleeve that can be at least partially inserted into a borehole of a component.

Abstract: A post anchor for anchoring a member to a post is disclosed. The post anchor comprises two segments: a drill end and a second end. The drill end is adapted to drill a hole in a post. A member is anchored to the post by attaching the member to the second end of the post anchor. The drill end is adapted to drill a hole in a post so that the post anchor is arranged in the hole without any axial play. An adhesive may be added to the hole to fill the spaces between the post and the drill end.

Abstract: The invention relates to a rack-and-pinion gear mechanism (1), for example for use in a steering mechanism of a motor vehicle, and to a method for the production of the rack-and-pinion gear mechanism (1). The mechanism comprises a housing (101), in which a pinion shaft (102) is mounted so as to be rotatable about an axis (103). The pinion shaft (102) is connected to a rack (110) which is mounted in the housing (101) in such a way as to be longitudinally displaceable. A counter-pressure device (102, 123) compensates for reaction forces between the pinion shaft (102) and the rack (110), having a thrust piece (102) and an adjusting/closing nut (25), between which a spring (123) is supported. The adjusting/closing nut (25) is composed of a material which has a softening/melting point such that the adjusting/closing nut (25) can be softened and/or melted locally while installed in the housing (101) without damaging the housing (101).

Abstract: A composition for use as a self-locking agent is provided which comprises an aqueous dispersion of the following ingredients dissolved and dispersed in water: (a) a polyamide powder insoluble or slightly soluble in water, (b) an isocyanate compound, (c) a surfactant and (d) a water-soluble polyamide. The composition permits a polyamide resin layer of a smooth surface to be formed on a screw surface of a to-be-coated member. With use of the composition, it is possible to prevent slippage and sagging of the resin layer coated on the screw surface and improve the precision in resin coating processing.

Abstract: The present invention provides a screw comprising a head and a threaded shank, wherein the shank is covered with a coating at least 60% of the length thereof from the end, the coating includes microcapsules that contain a viscous fluid with an appropriate level of viscosity. Shavings, including powdered shavings due to friction and exfoliations that may be generated during the screwing process, will be held, so that they will not fall, at the surface of the shank by the viscous fluid coming out of the microcapsules.

Abstract: A fastener adapted for anchoring into a masonry structure, such as a concrete block, employs an epoxy resin system so that the fastener is both mechanically engaged and bonded to the structure. In one preferred configuration, the bead is composed of a hardener, a resin and a nylon powder and has a cardioid-shaped configuration which subtends substantially 360° around the shank at an intermediate position of a threaded portion of the fastener. Various configurations are disclosed, including a fastener wherein adhesive in microencapsulated form is also applied to a lower intermediate portion. In addition, wings may extend from the shank.

Abstract: An adhesive is applied to a male-threaded portion of a tapping screw. The male-threaded portion with the adhesive is threadably engaged with a non-threaded through hole of the full-closed stopper with female-threads being formed on the surface of the though hole. In this case, the adhesive functions as lubricant between the inner surface of the through hole and the male-threaded portion. Accordingly, the male-threaded portion can be screwed into the through hole with a low torque and without applying high load to the full-close stopper. Therefore, the full-close stopper is prevented from being projected around the inlet and the outlet of the through hole, and the full-close stopper is prevented from being cracked.

Abstract: A blind rivet system including a number of parts to be joined that have aligned holes. A tubular rivet body is disposed in the aligned holes and includes a rivet head portion and a sleeve portion. The head portion and sleeve portion include a longitudinal bore. A mandrel having a head portion greater in diameter than the bore and a shaft portion is disposed within the longitudinal bore. An adhesive is disposed in an annular space defined by the interior surface of the bore and an exterior surface of the shaft portion. An installation tool having a seal intersects with the rivet head portion such that when the head portion is drawn within the bore during installation, the adhesive is maintained within the tubular rivet body and extruded from the annular space to a region between faying surfaces of the parts to be joined.

Abstract: A fastening device, which will facilitate the assembly of associated parts or manufactured articles, and electromagnetic energy absorptive component for absorbing electromagnetic waves and converting wave energy to heat; an expansive component, which expands upon exposure to heat emanating from the target material; matrix material, which will become adhesively active and effect the adherence of the associated parts upon exposure to heat emanating from the target material, and a stiffening component.

Abstract: This invention provides a design of an adhesive encapsulated blind rivet for joining an assembly of overlying parts having an accessible side and an inaccessible side. The rivet comprises a rivet head and tubular rivet body. A mandrel is inserted through the open end of the tubular rivet body and through a mandrel hole in the rivet head. A mandrel head engages the end of the tubular body. The tubular body is filled with a mass of latent adhesive around the mandrel. The rivet body is longer than the thickness of the parts to be joined to accommodate a substantial amount of adhesive for expulsion through holes in the rivet body located within the thickness of the assembled parts. The portion of the rivet body extending beyond the blind side of the assembled parts is weakened in a pattern of corrugations or other bands for folding of the end of the tubular body in setting the blind side of the rivet and expelling the larger quantity of adhesive against and between the riveted parts.

Abstract: A fastening device on a support panel, having at least one structural element, is to be designed in such a way that under predefined tightening of the fastening device on the support panel no lasting damage occurs. To achieve this, a holding part of the fastening device has a step at a point of connection with the support panel, and a spacer of the fastening device has a double bushing having an outer sleeve and an inner sleeve. The two sleeves are positioned with respect to each other in such a way that when the fastening device is tightened the inner bushing comes into contact with the step and the indentation of the support panel into the spacer is limited. The fastening device is preferably intended for use in the automobile industry.

Abstract: A method and fastener for distributing an anchoring material and securing abutting honeycombed panels in a generally perpendicular alignment. The fastener is provided with a pointed tip to penetrate into undrilled portion of the inner cellular structure of one of the panels. The hollow fastener allows for the injection and distribution of an anchoring material into the ruptured cell core and into predrilled bores in the first panel.

Abstract: A connection, and a method of forming a connection, that adhesively fixes and bonds a fastening element or anchor in bore hole, particularly in a soft substrate or substrate with an interior cavity or void where the anchor is to be set in vertical wall or set upwardly into a ceiling. To make the connection, an accessory is used that has the form of a sleeve having a closed or partially blocked insertion end and an open anchor receiving end and apertures running along its length. The accessory helps to ensure that the anchor is surrounded with mortar or adhesive, and the mortar or adhesive contacts the wall of the bore. The cylindrical wall of the sleeve has apertures along its length. The sleeve can be formed with larger apertures formed near the anchor receiving end of the sleeve and smaller apertures formed near the insertion end of the sleeve. The sleeve is formed by inserting an open-ended cylindrical mesh tube into a frame that holds the tube along its length at a select location.

Abstract: Two-piece fastener assembly for securing thermoplastic roof membranes to an underlying roof deck having: a batten bar coated with a thermoplastic coating on its top surface; a plurality of openings in the batten bar; and fasteners positioned in the plurality of openings for securing the batten bar and one thermoplastic roof membrane to the underlying roof deck.

Abstract: An object of the present invention is to provide an excellent weld nut wherein the weld nut and an iron plate are closely fixed together by inserting extra metal materials upon welding into a groove around a weld projection. The present invention relates to weld nuts each having such a groove in the vicinity of such a weld projection.

Abstract: A front section 10 of a cabinet is provided with a main channel 13a which takes a shortcut in front of display-supporting bosses 12 in boss-erected corner portions of a front plate and into which high-pressure gas is injected, subchannels 13c which pass under the display-supporting bosses 12, and choke channels 13b between the main channel 13a and the subchannels 13c to reduce the gas pressure. Therefore, screw holes 12a of the bosses 12 are not deformed by the high pressure of gas flowing through the subchannels 13c. Besides, recesses are made on both sides of a channel-forming zone in the boss-erected corner portions “C” of the front plate; therefore, the high-pressure gas is prevented from straying from the channel-forming zone.

Abstract: A friction stir rivet is rotated and driven through a first fusible workpiece into an engaged second fusible workpiece, causing local portions of the first and second workpieces to plasticize. A slideable cap contacts the exposed surface of the first workpiece shortly after the process begins. The cap acts as a retaining element limiting plasticized material from escaping during the process. As the rivet is further driven into the members the cap slides up the rivet and actuates an angled stirring member to increase the stir radius around the body of the rivet. Once the rivet is driven into the first and second workpieces, rotation is stopped and the plasticized material cools and hardens around the rivet, creating a weld joining the workpieces and encompassing the rivet, which provides additional mechanical strength.

Abstract: A substantially cylindrical washer having two arch-shaped channels 7, on a face on the bore hole side of the washer, wherein said channels connect an opening 2 with a through passage 3. The opening 2 is configured for the passage of an anchor rod and the through passage 3 is configured for filling a mortar mass into the bore hole. The channels 7 open relative to the bore hole and include a substantially semi-circular cross-section to assure the high tensile strength of the washer.

Abstract: A fastening device, which will facilitate the assembly of associated parts or manufactured articles, and electromagnetically absorptive component for absorbing electromagnetic waves and converting wave energy to heat; an expansive component, which expands upon exposure to heat emanating from the target material; matrix material, which will become adhesively active and effect the adherence of the associated parts upon exposure to heat emanating from the target material, and a stiffening component.

Abstract: A method and apparatus for restricting rotation of a threaded fastener, the apparatus including a bracket member having a securing segment and an extending segment that are integrally linked wherein the securing segment forms a recess and the extending segment forms at least one restraining surface wherein a bonding material that solidifies and remains flexible upon curing is provided within the recess and, with the threaded fastener received within an aperture, the bracket member is positionable such that one end of the threaded member is receivable within the recess and within the bonding material prior to curing and the restraining surface contacts a surface of a receiving member to restrict motion of the bracket member about the aperture.

Abstract: A concrete anchor bolt formed of an axially extending fixing member (1) having a first axially extending section (5) fixable in a tapped blind borehole (3) in a first solid body (4) secured by a temporarily fluid fixing agent (2) and an axially protruding second axially extending section (7) embeddable in a subsequently settable second solid body (6), wherein a conically shaped section sleeve (8) is present on the second section (7).

Abstract: A fastener system for adhesively coupling non-threaded components comprises, in combination a rigid bolt. The bolt has a head externally. The bolt has a shaft internally. The head has a generally hemispherical exterior end with a cental axis. The head also has a generally planar interior end. The head further has a top and a bottom. The shaft is in a generally cylindrical shape with a central axis. The fastener system also comprises a nut. The nut has a generally hemispherical exterior end. The nut has a generally planar interior end. The nut further having a top and a bottom. The exterior end of the nut has a radially circular flat region. A recess is provided in the circular flat region of the exterior end. The recess is adapted to receive the shaft. An adhesive provides a secure coupling between the nut and bolt.

Abstract: A compressible structure for temporarily protecting a glass pane of a window structure includes a shaping member for removable securement on the window structure and defining a cavity over the glass pane and a layer of solidified compressible material in said cavity providing protection for the glass pane. A window protection system includes a shaping member and a supply system for supplying a compressible material in fluidic form to a cavity of the shaping member, wherein the fluidic compressible material sets to form a layer of solidified compressible material. A protected window structure comprises a window structure and a panel of solidified compressible foam material disposed over at least a portion of one or more glass panes of the window structure.

Abstract: A tubular anchor includes a tubular member (1, 21) with a drilling head (2, 22) at one of its end, a load application element (3) extending along a portion of the tubular member opposite the one end, opening (5, 23) provided in a region of the drilling head. The tubular anchor also includes at least one, substantially cylindrical, hollow element (7, 24, 25) for receiving a mortar mass (4, 37, 38) and closed, at its opposite ends, with two displaceable pistons (8, 9; 31, 32, 33, 39), respectively, with one of the pistons being received in a piston-receiving region of the at least one mortar-mass receiving element and facing in a setting direction (S), (6, 35) and at least one through-opening (11, 34) spaced from a free end of the piston-receiving region (6, 35) by a distance (a, b) corresponding at least to a length (l) of the piston (8, 32) received therein.

Abstract: An electrically insulated anchor device is described, comprising a rigid elongated metal sleeve including an external surface that leads from an open top end to a bottom end. A longitudinal internal bore is formed within the sleeve with a bore wall spaced from the external surface by a sleeve wall thickness dimension. An electrically insulative polymer insert with an external surface engages the bore wall within the sleeve. The insert further includes a fastener receiving bore defined by a fastener receiving wall spaced from the external insert surface by an insert wall thickness dimension. The sleeve wall thickness dimension is substantially greater than the insert wall thickness dimension.

Abstract: A break-away lug nut positioner for holding lug nuts on a race car wheel to facilitate more rapid tire changes during pit stops. The break-away lug nut positioner includes a spacer that supports a lug nut at a proper distance over a mounting hole of a race car wheel. That is, the spacer holds the lug nut so that it is adjacent to a threaded mounting stud when the wheel is held flush against the race car hub. During installation, the lug nut is driven into the spacer cavity, forcing the spacer to break into pieces. The adhesive bond between the lug nut and the spacer is weaker than the individual pieces of the spacer, which causes the spacer to separate cleanly from the lug nut, allowing the lug nut to seat properly against the wheel mounting plate. That is, the adhesive and the material and configuration of the spacer are selected so that the spacer breaks cleanly away from the lug nut, and no spacer material remains between the lug nut and the mounting plate.

Abstract: An adhesive fastener for securement to a substrate which has a reservoir comprising a reservoir cup and a piston located therein blocking entry of atmospheric water vapor and preventing unintentional leakage of adhesive from the reservoir and a wall portion of the reservoir may be displaced to prevent hydraulic lock as the piston is pushed into the reservoir during assembly of the fastener and also when the fastener is being deployed against the substrate. Apparatus and a method of filling the reservoir cups and inserting pistons therein while excluding atmospheric water vapor is disclosed.

Abstract: A fastening device, which will facilitate the assembly of associated parts or manufactured articles, features a conductive target material for absorbing electromagnetic waves and converting wave energy to heat; an assembly element, contiguous with the target material, which expands upon exposure to heat emanating from the target material; and a solid adhesive material, contiguous with the conductive target material, which will become adhesively active and effect the adherence of the associated parts upon exposure to heat emanating from the target material.

Abstract: The present invention relates to a lockbolt and a method for installing a lockbolt that removes a coating, such as a sealant that has inadvertently flowed into a hole into which the lockbolt is to be installed. The lockbolt and method prevent a coupling surface of the lockbolt from being contaminated by the coating.

Abstract: A chemical anchor bolt and cap assembly installable in a hole drilled in masonry for fastening an object thereto The threaded shank of the bolt and the hollow cap extending from its end are inserted into the hole, causing an uncured bonding agent deposited in the hole, such as an epoxy, to surround the cap and the shank. When the epoxy hardens the cap is then embedded in the epoxy to create a void below the end of the shank. Cast in the epoxy surrounding the shank is a female thread that complements the shank thread. To permit the bolt to turn and cause the end of the shank to advance into the void and thereby tighten the fastening, the threaded shank has coated thereon a releasable barrier layer that acts to masks surface irregularities in the shank thread and to slightly space the shank thread from the female thread. As a consequence, the female thread cast in the epoxy is functionally free of irregularities and is loosely intermeshed with the shank thread whereby the bolt can then be easily turned.

Abstract: A centering sleeve and overflow member assembly adapted to facilitate installation of a bolt having a head and a shank extending therefrom in a hole drilled in masonry having a diameter greater than that of the shank to fasten a fixture to the masonry. The fixture has a mounting hole in alignment with the masonry hole in which is deposited a charge of a flowable uncured bonding agent. The overflow member which rests on the fixture has an opening therein in registration with the mounting hole and the sleeve which fits in the mounting hole telescopes into the upper end of the masonry hole. The sleeve is provided with centering means which when the shank is inserted through the sleeve into the masonry hole and the bolt head then lies adjacent the fixture, then acts to maintain the shank coaxial with the sleeve and with the bank of the masonry hole below the sleeve to define an inner passage between the shank and the sleeve and an annular space between the shank and the bank.

Abstract: An electrical connector for establishing an electrical connection to an electrical conductor. The connector includes a connector body with a cylindrical hull or recess for receiving the electrical conductor with an insulating layer. A contact screw is positioned in the connector body and the contact screw includes an end portion for displacing or piercing the insulating layer of the insulated conductor.

Abstract: A method for securely joining together at least first and second structural elements without disrupting the contour or continuity of the surfaces of the structure or the structural elements is disclosed. The first structural element has a first hole having a counterbored section. The counterbored section has a recessed cavity therein, which is open to the counterbored section and has an upper wall that extends generally radially outwardly from the longitudinal axis of the first hole. The second structural element has a second hole in coaxial alignment with the first hole. A fastener, such as a bolt or stud and nut combination, is inserted into the coaxially aligned holes so that the structural elements are thereby joined and the head of the bolt or nut is recessed in the counterbored section of the first hole. A suitable castable material, e.g. aluminum, is then applied to the first hole so as to fill any remaining space in the hole, including the counterbored section and the recessed cavity.

Abstract: A fastener is formed from carbon steel wire so as to have an elongate shank defining an axis, an enlarged head formed at one end of the shank, and a generally pointed tip formed at the other end of the shank. The shank has a ringed portion formed with annular grooves defining annular rings and with helical grooves intersecting the annular grooves and defining helical ribs. The fastener is heat-treated, zinc-plated, and chromate-coated. Substantially all of the shank or of the fastener, as a whole, is further coated with a polymeric material to resist corrosion, to improve ease of driving the fastener, and to increase holding power of the fastener when driven through a wood, plywood, or plasterboard workpiece and then through a steel framing member. Substantially all of the shank or of the fastener, as a whole, may be thus coated with the polymeric material. The polymeric material softens and flows upon penetration and rehardens.

Abstract: An adhesive insert anchor including an anchor body and a screw member for insertion into a drilled hole in a substrate containing an adhesive. The anchor body further including an integral friction segment and an adhesion segment. The friction segment includes an internally threaded cavity in which to receive the screw member and a knurled portion. The adhesion segment includes a cylindrical section and a plurality of saucer-shaped buttons positioned along its length ending with a terminal button. The buttons on the adhesion segment provide greater surface area for contact between the adhesive and the anchor. The friction segment has an external diameter substantially the same as the diameter of the hole drilled in the substrate, thereby providing a friction fit between the anchor body and the walls of the substrate hole.

Abstract: An anchor bolt for anchoring with a compound mass in a hole drilled in a building component comprises a bolt element having a leading end and a rear end, elements for fixing an article at the rear end, and a mixing attachment arranged at the leading end of the bolt element and having a point. The mixing attachment has an outer surface provided with a plurality of radially projecting lugs which are arranged circumferentially and axially spaced from one another.

Abstract: A push-on cap for covering the pointed, threaded end of a metal screw. The cap is filled with a polymer inert to the metal, and a curing catalyst, whereby the polymer and curing catalyst are separated until the cap is placed on the screw. The push-on cap is also readily removable from the screw.

Abstract: A bolt and nut formed from a plastic material are provided with the bolt having proximate and distal ends and the nut having an interior surface defining a bore. Raised projection members are formed integrally extending from the nut interior surface into the bore and together define a diameter slightly smaller than the shank diameter. In this manner, an interference fit is provided between the shank and projection members. With the bolt shank inserted through aligned holes in parts to be fastened, the nut can be mounted on the distal end of the bolt shank, as by a force fit, and slid thereon by exerting an axial force on the nut until the parts are clamped between the bolt head and nut.

Abstract: A construction anchor for mounting an object on a structure of masonry, concrete, wood, metal or the like includes an anchoring portion and a cap. The anchor is adapted to be inserted, anchoring portion first into a pre-drilled adhesive-filled hole. The anchoring portion has a threaded bore, which includes an unthreaded close-fit-counterbore portion outward of a threaded portion. The cap prevents dust, dirt and adhesive from entering the threaded bore, and has an upper surface with a removable central area. When the adhesive has set, holding the construction anchor within the hole, the central area is removed, and a screw or bolt is inserted through the hole left by the removal and engaged with the threaded portion of the threaded bore. The unthreaded close-fit-counterbore portion of the threaded bore provides a stretch zone for the screw or bolt.

Abstract: A construction anchor for mounting an object on a structure of masonry, concrete, metal or the like includes a metal anchoring portion and a plastic cap. The anchor is adapted to be inserted, metal end first, into a pre-drilled adhesive-filled hole. The cap has a flange that is larger than the hole diameter, so that the anchor may be inserted and seated in the hole at a consistent depth. When the adhesive has set, a screw or bolt is inserted through the plastic cap to engage the threads in an internal bore in the anchoring portion. The plastic cap serves not only to determine the depth of the anchor in the hole, but also to prevent adhesive and other material from entering the threaded interior of the anchor prior to use.