Abstract: An autograft forming bone anchor is provided including an elongated anchor core having a tip at a distal end and coupled to a head at a proximal end, and a segmented helical thread defining one or more gaps therein, each gap defining at least a trailing wall, the trailing wall having a cutting surface including at least one cutting edge. A plane of the cutting surface that extends through a point of contact of the cutting surface with the anchor core and the cutting edge, is angled at an angle (?) with respect to a radius (r) of the bone anchor, and the bone cutting surface and the cutting edge are configured to cut bone and guide bone fragments radially inwards. Other embodiments are also described.

Abstract: An external screw member includes a parallel screw portion and a tapered screw portion provided on a side further toward a tip end than the parallel screw portion, and a plurality of sets of step portion and a transition screw thread portion are provided on at least one of the parallel screw portion and the tapered screw portion, the step portion having a reduced thread height in a radial direction and the transition screw thread portion gradually increasing in diameter from the step portion in an anti-driving rotation direction so as to reach a thread height of a normal screw thread portion. A top portion of the transition screw thread portion is positioned at an offset toward a pressure side relative to a position of a regular screw pitch in a minimum diameter portion of the step portion, and transitions to the regular screw pitch in the anti-driving rotation direction.

Abstract: Systems and methods are provided for fabricating composite parts. One embodiment is a method for fabricating a composite part, the method comprising: reducing a bulk factor of chips of chopped fiber while forming the chips into a pre-consolidated charge; shaping portions of the pre-consolidated charge into shaped volumetric charges that fit within a die; and compression molding the shaped volumetric charges within the die.

Abstract: A self-tapping screw includes a head portion, a lower side thereof configured with a screw rod, a front end thereof configured with a drill tail, a first thread segment formed on a front end of the screw rod above the drill tail, a second thread segment with at least two threads formed on a rear end of the screw rod immediately below the head portion, a crest angle of any one of the threads of the second screw segment being 1.15 to 1.2 times of a crest angle of any thread of the first thread segment, and a thread root diameter of the second thread segment increasing proportionally with the crest angle of the second thread segment. Whereby, the present invention provides a self-tapping screw capable of tight locking without idling.

Abstract: According to an aspect of some embodiments there is provided a bone anchor including an elongated core having a tip at a distal end and coupled to a head at a proximal end, and a segmented helical thread defining one or more gaps therein, each gap defining at least a trailing wall, the trailing wall having a cutting surface including at least one cutting edge. The bone cutting surface and the cutting edge configured to cut bone and guide bone fragments radially inwards. According to an aspect of some embodiments there is further provided a bone anchor kit and a method for implanting the bone anchor in bone.

Abstract: A screw and anchor assembly include a male fastener and a female anchor. The male fastener only has threads or half-circular fins on half of the surface area. The other half is just like a regular cylinder. The female anchor only has threads or half-circular fins on half of the inner surface area. The other half is just like the inner wall of a regular cylinder. The user may push the male fastener into the female anchor, so the half-circular fins on the male fastener engages with the half-circular fins inside the female anchor and locks the male fastener to the female anchor. When the user needs to remove the male fastener, simply turns the male fastener 180 degrees and disengages the half-circular fins on the male fastener from the half-circular fins on the female anchor, then pull the male fastener from the female anchor.

Abstract: An apparatus for releasably coupling a lock assembly to a structure. An inner housing and an outer housing are positioned on opposite sides of the structure. An elongate rod extends throughout the inner housing and into the outer housing. The elongate rod is configured to slide axially within an internal bore of the outer housing until a handle engages the inner housing. The elongate rod is configured to couple the inner and outer housing to the structure when the lever is rotated approximately one quarter of a full turn (90 degrees).

Abstract: The present invention provides a threaded connecting member and a threaded connecting structure with a radiating function. Since a radiating passage which extends along a length direction of the threaded connecting member is provided on the threaded connecting member and the radiating passage runs through one end of the threaded connecting member to the other end of the threaded connecting member, when the threaded connecting member with the radiating function provided by the present invention is used, the threaded connecting member is provided in a connecting hole in a connector in a penetrating manner, the radiating passage communicates spaces on two sides of the connector, gas in the spaces on the two sides of the connector can perform heat exchange through the radiating passage and thereby the heat diffusion capability of a connected device is improved.

Abstract: A fixation assembly for affixing a first object to and variably spaced from a second object. The assembly comprises a male fastener and a female fastener. The male fastener comprises a bolt-shaped part having a circumferential outer surface. The surface includes alternately on a circumferential path, in a cross-sectional plane of the part, at least one ridged section and at least one plain section. The female fastener comprises a tubular part having a circumferential inner surface. The inner surface includes alternately on a circumferential path, in a cross-sectional plane of the part, at least one ridged section and at least one plain section. The male fastener can be inserted into the female fastener such that its ridged section coincides with the female fastener plain section. Either the male or female fastener is configured to be rotated relative to the other, thereby engaging respective ridges of the two fasteners.

Abstract: An exemplary bone screw includes a proximal section including a first outer thread, a center section including a second outer thread, an unthreaded distal section on an opposite side of the center section from the proximal section, a channel extending from the proximal section to a distal opening of the unthreaded distal section, and at least one side opening extending from the channel to an outer surface of the unthreaded distal section. In some embodiments, the at least one side opening includes a cutting edge configured to cut a material as the bone screw is rotated in a direction for removing the bone screw. In other embodiments, the side opening is formed in at least one of the center section and the unthreaded distal section and includes a diameter that increases in a direction from the channel toward an outer surface of the center section or the unthread distal section. The exemplary bone screws may be used to treat bone fractures with or without a bone plate.

Abstract: A composite filament-wound shaft with an end fitting mounted on an interface region on at least one end of said shaft, wherein in said interface region filaments of the filament-wound shaft are angled with respect to the shaft axis such that they follow a path with a radial component and have been cut so as to expose the ends of said filaments in said interface region; and wherein said end fitting comprises a helical thread engaging with said interface region. The helical threaded engagement provides excellent load transmission of axial forces and is therefore well suited to tension and compression elements. The joint provides a low cost and low weight interface.

Abstract: A trapezoidal thread form includes a thread having a trapezoidal cross-sectional shape, the thread including an apex surface, two side surfaces, and a valley; and a thread wear indicator formed in one of the apex surface and one of the side surfaces. The thread wear indicator may include a v-shaped channel formed in one of the apex surface and one of the side surfaces or the thread wear indicator may include a series of material layers, each layer having a physical characteristic that is different from an adjacent material layer. The thread wear indicator indicates excessive or unsafe thread wear when the v-shaped channel is indistinguishable from the apex surface or the side surface, or when a first layer wears sufficiently to show a second layer.

Abstract: A bone screw and a method for manufacturing the same includes a screw thread configuration having one or more grooves cut into a leading face of the thread, a trailing face of the thread, and/or the shaft between the threads. Other implementations include the incorporation of facets into the one or more grooves. The implementation of the one or more grooves increases the surface are of the orthopedic screw and functions to increase in anchoring the bone screw within the bone once inserted therein, and thereby reduce the possibility for the screw backing out after insertion.

Abstract: A locking mechanism selectively suitable for security locks with different design includes a first locking component, a second locking component and a pivoting component. The first locking component includes a first body, a first stretching portion and a second stretching portion. A first locking hole is formed on the first body. A first piercing hole, a first constraining hole and a second constraining hole are formed on the first stretching portion. A second piercing hole and a slide slot are formed on the second stretching portion. The second locking component includes a second body whereon a second locking hole, a third piercing hole and a third constraining hole are formed. The pivoting component includes a shaft, a first block and a second block. The shaft pieces through the foresaid piercing holes. The first block and the second block are movably switched between the foresaid constraining holes and the slide slot.

Abstract: A bone screw is provided that includes a tubular body having a first end and a closed second end. The tubular body has a tubular wall defining a cavity wherein the thickness of the wall in a radial direction is smaller than an inner radius of the cavity and wherein a plurality of recesses is provided extending entirely through the tubular wall into the cavity. The tubular body further includes an exterior bone thread on an exterior tubular surface portion of the tubular wall, a head at the first end configured to engage with a driver to advance the bone screw in the bone, and a tip at the second end. The tubular body, the head and the tip are formed as a single piece.

Abstract: Data may be collected regarding the configuration and operation of computing resources in a customer network. The collected data may be utilized to identify computing resources available from a computing resource service provider that duplicate functionality provided by the computing resources operating in the customer network. Pricing data may then be utilized to compute an estimated price for operating the identified computing resources available from the service provider.

Abstract: This threaded fastening element (2) comprising a threading (14) extending along a central axis (A), the threading (14) having at least one screw thread having an apical angle decreasing gradually, continuously and monotonously, between a first apical angle (?1) and a second apical angle (?2) strictly smaller than the first apical angle. The threaded fastening element is a screw or a nut.

Abstract: The invention relates to bone implants, namely screw-type implants and, more particularly, to a self tapping dental implant having at least two helical grooves running in opposite directions around the implant.

Abstract: A fastening bolt includes a shaft defining a central axis, a head, a drilling portion, and first threads alternating with second threads. The first threads and the second threads have different outer diameters. Each first thread has a trailing surface facing the head and inclined to a line perpendicular to the central axis by a trailing angle and a leading surface facing the drilling portion and inclined to the line by a leading angle. The trailing angle is smaller than the leading angle to build an asymmetrical form. Some threads near the drilling portion form respective cutting grooves and recesses thereon. Each cutting groove is formed by walls with different lengths and opened at an angle which does not exceed 90 degrees. The bolt breaks the workpiece quickly by the cutting grooves and recesses. The asymmetrical first threads help enter the workpiece quickly and attain a firm engagement therewith.

Abstract: A wooden screw may include a shank, a threaded segment, a screw head, a tapered portion and a stem portion. The shank diameter is smaller than the horizontal distance defined as a distance between two opposite ends of the tapered edges, while the width defined as a distance between two symmetric rear portions of blades is between the shank diameter and the horizontal distance, so a drill hole on the wooden material is not contacted with the shank during the screwing process, and the wooden screw also can reduce the friction and provide a complete mechanism for wood chips in accommodation and expulsion. Also, because the diameter of the drill hole is smaller than the horizontal distance, the tapered edges on the threaded segment are much easier to be screwed into wooden material. Therefore, the bonding strength between the wooden screw and the wooden material is increased.

Abstract: A method for the attachment of a bolt element to a component is described. The bolt element has a head part having a contact surface and a shaft part extending away from the head part, the shaft part having a tip provided at its end remote from the head part, the tip merging into a thread cylinder, optionally via a cylindrical region. The bolt element is pressed with the tip to the fore against the component and the tip is pressed through the component until the side of the component adjacent the head part of the bolt element enters to contact the thread cylinder and the tip thereby generates a hole in the component. The bolt element is subsequently turned so that the thread of the thread cylinder forms an internal thread in the wall of the hole. A bolt element is also claimed.

Abstract: In a mobile terminal having a security function, both convenience and security protection are realized so as to prevent a user from feeling bothersome. A mobile phone has an operation control unit which sets the operation of various functions of the mobile terminal to be unusable at any timing. When a used state determination unit determines that the mobile phone is not in an abnormal state and not left, the operation control unit controls operation of the various functions to maintain usable states.

Abstract: The present invention pertains to a bimate screw providing with a first section alternating with a second threaded section; wherein, the second threaded section has a smaller outer diameter than the first threaded section, and further a plurality of concavities are disposed on each thread of the second threaded section for defining two flanks therein. In this manner, both the first and the second threaded sections facilitate to sever and shatter cuttings so as to reduce the screwing resistance and prevent the object from being damaged under the accumulation of cuttings; simultaneously, the bimate screw effectively attains to a good resistance of extraction from the object by the concavities receiving the remaining cuttings which are not guided out of the object.

Abstract: A bolt (10) for securing timber to any other material, comprises: a bolt head (101) with a series of spiked teeth (102) on its underside; a cylindrical bolt rod (103) extending from the bolt head (101) is threaded and split into two rods (105a,b) at its free end, so as to define a slot (106) therebetween. In use a user drills a hole through pieces of timber to be secured together, and hammers the bolt through the hole. The spiked teeth on the bolt head lock into the timber, securing the bolt at one end. At the free, split end of the bolt rod, a washer and nut are tightened onto the bolt. A cold chisel is hammered into the slot between the split ends of the rod, bending the ends outwards and thus preventing the nut from loosening.

Abstract: A lock system having a bolt wherein a plurality of locking tabs are along a length of the bolt spaced a distance apart, a first track is along a portion of the length of the bolt, an inner nut having an inner channel, wherein threading is on an outer surface of the inner nut and a first mating tab is in the inner channel, the first mating tab slides along the first track as the inner nut slides over the bolt and the first mating tab can slide between a pair of locking tabs on the bolt when the inner nut is rotated in a first or second direction to secure the inner nut in a position along the length of the bolt, and an outer nut having an inner channel with threading and is adapted to removably thread onto the inner nut.

Abstract: A hydraulic disc brake caliper that includes a housing that has first and second side portions and first and second end portions that cooperate to define a braking opening. The housing also includes first and second piston receiving openings and first and second fluid openings. The caliper also includes a bolt received in the second fluid opening that includes a shaft having a portion of a fluid path defined in the outer surface thereof that includes at least one channel and at least one reduced diameter portion. The fluid path extends from the first fluid opening to the second fluid opening. The at least one channel and the at least one reduced diameter portion are part of the fluid path and are in fluid communication between the first and second piston receiving openings.

Abstract: A screw with double notches includes a head portion, a shank portion extended outward from the head portion, a threaded section spirally surrounded on the shank portion. Wherein, a raw section on the shank portion is provided with a cambered surface formed integral with the shank portion in cross-section, and a notched section relative to the raw section has two cutting notches separately depressed into the shank portion and disposed near an end of the shank portion, thereby forming a protrudent part between the two cutting notches. By means of the cooperation of the cutting notches and the raw section, the cutting capability and the removal of debris are increased so that a fastened object is prevented from split. Thereby, the drilling speed is promoted, and the effort to rotate the screw is lessened. While the supporting strength of the screw is improved, the screw does not break easily while screwing.

Abstract: A self-tapping fastener, which has been especially constructed for use in connection with the insertion and installation thereof into stucco, gypsum, wallboard, or other hard board substrates, wherein the forward end portion of the shank portion of the self-tapping fastener is provided with a pair of diametrically opposed flat sections which effectively form at least one pair of diametrically opposed tapping threads so as to effectively perform the thread tapping process despite exhibiting some abrasion of the forwardmost threads. In addition, the flat sections also effectively define recessed pockets for accommodating any dust, particles, debris, or the like, which will be generated during the thread tapping process.

Abstract: A bolt (10) for securing timber to any other material, comprises: a bolt head (101) with a series of spiked teeth (102) on its underside; a cylindrical bolt rod (103) extending from the bolt head (101) is threaded and split into two rods (105a,b) at its free end, so as to define a slot (106) therebetween. In use a user drills a hole through pieces of timber to be secured together, and hammers the bolt through the hole. The spiked teeth on the bolt head lock into the timber, securing the bolt at one end. At the free, split end of the bolt rod, a washer and nut are tightened onto the bolt. A cold chisel is hammered into the slot between the split ends of the rod, bending the ends outwards and thus preventing the nut from loosening.

Abstract: A bolt for use with a hydraulic disc brake caliper. The bolt includes a head and a shaft extending outwardly from the head. The shaft includes a threaded portion having a diameter, at least one channel defined at least partially in the outer surface of the threaded portion, and a reduced diameter portion defined at least partially circumferentially around the shaft and located between the head and the threaded portion. When the bolt is threaded into an opening, the at least one channel and the reduced diameter portion are in fluid communication.

Abstract: A screw has a screw head and a shank. The screw head has a square cavity, a hexagonal cavity or a hexagonal boss to be wedged by a screw driver for wrenching. The shank has a first asymmetrical thread at the taper to facilitate drilling holes, asymmetrical saw-type threads behind the first asymmetrical thread, and a second asymmetrical thread behind the asymmetrical saw-type threads. The shank further has a carved V-shaped tail between the first asymmetrical thread and the asymmetrical saw-type threads to facilitate cutting and debris dispelling. The screw thus formed can rapidly perform thread tapping and debris dispelling, and reduce friction and expand drilling holes and achieve fast fastening.

Abstract: A threaded rod comprises a single coarse thread having flattenings on opposite sides forming thread sections on opposite sides. At least one of the thread sections on one side of the threaded rod is omitted.

Abstract: A connection mechanism is provided with a shaft member formed with an outer-screw portion which is formed with an outer screw, a plate member formed with a connection hole in which the shaft member is fitted, a nut member formed with an inner-screw to engage with the outer-screw of the shaft member, the nut member engaged with the shaft member being urged toward the plate member fitted on the shaft member to fixedly secure the plate member onto the shaft member, and a fixing mechanism that fixes the plate member and the nut member with each other to retain a status where the plate member and the nut member are urged oppositely in a rotational direction about a central axis of the shaft member.

Abstract: A captive structural fastener including an integral hold-out feature is provided. The fastener includes a stud assembly including a stud, a retaining ring including two oppositely disposed tabs protruding toward the center of the retaining ring, a first sleeve that is matingly engageable with a second sleeve, the second sleeve including an inwardly disposed channel for receiving the retaining ring; and a receptacle assembly, the receptacle assembly including a bracket constructed and arranged to be secured to a panel, an internally threaded nut, a retaining clamp for securing the nut in the bracket, and a grommet assembly including means defining a bore for receiving the stud therethrough.

Abstract: A threaded element (1) is provided having at least two slots (3), notches, grooves or the like that intersect the thread (2). The slots (3), notches, grooves or the like are configured in relation to the thread (2) so that they intersect the thread (2) to form a sharp cutting edge on the thread flanks (4), thus preventing reverse rotation. The slots, notches or grooves have no more than 25-times the pitch and the same rotational direction as the thread.

Abstract: An alignment and locking system includes a dovetailed male portion having partial female threads formed in a surface thereof, a housing having a dovetailed notch for slidingly receiving the male portion, and a screw assembly coupled to the housing. The screw assembly includes a rotatable rod having a threaded region that partially extends into the housing's notch. The threaded region includes a partially threaded portion and a fully threaded portion. The partially threaded portion is defined by (i) a first region that cannot engage the partial female threads of the male portion as it slides in the notch, and (ii) a second region that can engage the partial female threads of the male portion as it slides in the notch. The system is further configured to impart a biased rotational movement to the rod to align the first region of the partially threaded portion with the notch when the male portion is not engaged in the notch.

Abstract: Screw connection for a fixed connection of two assemblies which are mounted to each other in a variable position, using a connecting member penetrated by a screw. The connecting member is mounted between the assemblies by means of a self-cutting screw penetrating the connecting member and one of the assemblies, which screw is grooving its thread into both parts in such a way that, starting from a stable end position of the one assembly and the connecting member, the screw is adapted to be screwed into the connecting member as well as into the one assembly by means of thread grooves such that, by means of the self-cutting thread of the screw, the connecting member and the one assembly are held in a fixed position with respect to each other, and the other assembly is fastened directly to the connecting member.

Abstract: The object of the present invention is to provide a bolt that effectively prevents gouging, seizure and racing between the bolt and nut without the aid of a guide boss and is effective when combined with the case nut. The object can be attained by providing a bolt having a threaded shank portion wherein a plural number of notched faces slanting toward the end of the threaded shank portion at an angle ranging from ±15° to ±80° toward the axis of the threaded shank portion, are formed at the beginning of the thread part of the threaded shank portion.

Abstract: A positive locking machine screw mechanism comprises a screw having a head and a body wherein the body includes male threads formed thereon wherein the threaded body has at least one longitudinal segment devoid of threads. A work piece defines a hole having female threads formed therein for receiving the screw and further defines in a portion of the hole, at least one longitudinally extending segment devoid of female threads. The longitudinal screw segment devoid of male threads and the longitudinal hole segment devoid of female threads are arranged such that the screw body is longitudinally received in the hole without engagement of the male screw threads with the female work piece threads.

Abstract: The object of the present invention is to provide a bolt that effectively prevents gouging, seizure and racing between the bolt and nut without the aid of a guide boss and is effective when combined with the case nut. The object can be attained by providing a bolt having a threaded shank portion wherein a plural number of notched faces slanting toward the end of the threaded shank portion at an angle ranging from ±15° to ±80° toward the axis of the threaded shank portion, are formed at the beginning of the thread part of the threaded shank portion.

Abstract: A retaining device for a split bolt connector which includes: a continuous wall that defines an aperture and at least one bendable tab extending upwardly from the wall or a member extending between opposing wall sections. The wall is adapted to accommodate the nut on a split bolt connector in the aperture and the at least one tab, or the member, is adapted to engage the slot in the split bolt after the nut is connected to the split bolt.

Abstract: A thread structure for an optical lens comprises a plastic lens barrel, and the thread structure is formed on an outer surface of the lens barrel. In each single circle of the thread structure there is a normal thread and a partial withdraw thread. The partial withdraw thread is located on a longitudinal parting line of the thread structure, a top diameter and a pitch circle diameter of the partial withdraw thread are smaller than those of the normal thread, the thread structure is provided with ribs that are located at the root of a first normal thread close to the front end of the lens barrel. The withdraw thread produces an interval between the thread structure and the base, thus preventing the burrs on the parting surface from contacting the inner threads of the base and causing powder.

Abstract: The present invention pertains to a bimate screw providing with a first section alternating with a second threaded section; wherein, the second threaded section has a smaller outer diameter than the first threaded section, and further a plurality of concavities are disposed on each thread of the second threaded section for defining two flanks therein. In this manner, both the first and the second threaded sections facilitate to sever and shatter cuttings so as to reduce the screwing resistance and prevent the object from being damaged under the accumulation of cuttings; simultaneously, the bimate screw effectively attains to a good resistance of extraction from the object by the concavities receiving the remaining cuttings which are not guided out of the object.

Abstract: A fastener for composite material having a dense composition employs a head which has a socket and a recessed underside and a lower rim. The shank has an upper portion with an enlarged diameter and a left hand thread while the lower portion has a tri-lobed configuration and is traversed by a right hand thread. The right hand thread may have a plurality of notches which, in one embodiment, are arranged in a spiral array.

Abstract: A frame assembly for mounting recessed fixtures that can be manually installed without the use of tools. One embodiment of the invention includes a primary mounting frame for recessed installation, the primary mounting frame defining an open interior to accommodate a fixture and including a border flange along the outer edge of the open interior. A ratcheting fastener is rotationally coupled to the primary mounting frame and can be manually secured by depressing it toward the border flange to secure the primary mounting frame between opposite surfaces of a substrate. The ratcheting fastener can be rotated to engaged or disengaged from ratcheting teeth.

Abstract: A method of attaching a functional element (10, 210), in particular a fastener element to a sheet metal part (12, 212), optionally in liquid and/or gas-tight manner, is characterized in that the functional element (10, 210, 410) is pressed against the sheet metal part (12, 210, 410) supported by a die (14, 114, 214, 414) and sheet metal material (13) is pressed by means of at least one movably mounted shaped part (16, 116, 216, 416) of the die (14, 114, 214, 414) into an undercut (18, 218, 418) of the functional element (10, 210, 410). The disclosure also claims a die, a functional element, and a component assembly comprising the functional element and a sheet metal part.

Abstract: A self tapping bolt which fastens a mounting member and a receiving member while the bolt cuts internal threads on an inner surface of a tap drill hole prepared in the receiving member. The bolt includes at least one groove formed near an end of a threaded portion of the bolt and a blade for cutting the internal threads. The bolt includes the feature of the blade being formed only on a rear end surface of the groove relative to a rotational direction of the bolt which is screwed into the tap drill hole.

Abstract: The present invention relates to a fluid connector, comprising a shaft having at least one solid shaft element and a plurality of connector surfaces, wherein the plurality of connector surfaces includes a surface with a plurality of threads and a plurality of grooves.

Abstract: A plastic push-in or drive fastener having a enlarged head and a shank is disclosed. The fastener is configured to allow the shank to be pushed through a complementary shaped aperture or opening in an article using a relatively low insertion force. A helical screw or rib formation on the fastener shank provides a retention force opposing the fastener from being axially withdrawn from the article while readily permitting withdrawal of the fastener from the article in response to rotation of the fastener about its axis. Moreover, the fastener shank is configured to prevent inadvertent separation of the fastener from the article through which it passes.

Abstract: An improved anchor device or fastening member which is particularly suited for use in the attachment of various fixtures and equipment to masonry, concrete, and other hard and/or friable substrates includes a head and a shank depending therefrom. The shank has a first threaded portion having a predetermined thread angle and a predetermined hardness, and a second threaded portion having a predetermined thread angle and a predetermined hardness. The first threaded portion is proximate to the head and the second threaded portion extends from the first threaded portion. The thread angle of the first threaded portion is different than the thread angle of the second threaded portion. In addition, the hardness of the first threaded portion is softer than the hardness of the second threaded portion. This provides for a more ductile anchorage when the fastening member is engaged with the substrate.