Abstract: A bonding stud for a data center cabinet comprises a body adapted to geometrically conform to a cage nut hole within the cabinet. The body may comprise opposing threaded studs and an annular shoulder that extends outward from the body to provide contact and bonding with ground strips used in connection with the data center cabinet. Projections formed between the shoulder and the sides of the body may penetrate the surface of the frame rails of the data center cabinet to provide a bond to the base metal of the frame rails.

Abstract: An object such as an electromagnetic valve is resiliently mounted (or in a floating manner) on a mounting base such as an intake manifold of an internal combustion engine. A valve port of the electromagnetic valve is connected to a connecting hole of the intake manifold via an O-ring, and a stay connected to the electromagnetic valve is coupled to a bolt via a resilient member such as a grommet. The bolt is rotated to be fastened to the intake manifold by screwing. A rod portion of the bolt is inserted into a hole of the grommet. Projections and depressions such as grooves extending along the rotational direction of the rod portion are formed on the inner surface of the grommet hole to reduce a contacting area and abrasion force between the grommet and the rod portion. In this manner, deformation of the grommet caused by rotation of the rod portion is suppressed.

Abstract: A fastener assembly includes a retainer clip having a base, a deck spaced from the base and an opening in the base aligned with the deck. A threaded fastener has a head received through the opening in the base and non-rotatably secured to the deck, and an externally threaded body that extends through the opening in the base.

Abstract: A fastener having a plurality of flexibly firm bristles. The fastener includes a substantially linear primary attachment member, such as a bolt, for example, and a plurality of flexibly firm bristles connected to the substantially linear member. When the fastener is inserted into a hole, friction between the plurality of flexibly firm bristles and the inner circumference of the hole secures the fastener within the hole. Since the plurality of flexibly firm bristles are flexible, they are insertable into any one of a plurality of holes which collectively have a wide range of inner circumferences. The fastener is especially useful for securing heavy objects, such as a large sign, to a stationary support member, such as a side of a building. The fastener is also useful for securing objects to a stationary support member that does not allow, or does not easily allow, holes to be drill entirely therethrough, such as a brick wall, for example.

Abstract: A portable spa including an audio system designed to use the spa shell as the sound generating device. Transducer devices are mounted within an enclosure which is bonded to the spa shell so as couple the sound vibration energy to the shell so that sound can be heard when using the spa.

Abstract: An anchor bolt comprising a main body (4), a bolt head (5), at least one supporting blade (6), an internal thread (2); and an external thread (3); wherein the external thread (3) is disposed along the external surface of the main body (4); the internal thread (2) is disposed along the internal surface of the main body (4) and/or the bolt head (5); and the supporting blade is attached to the main body and the bolt head (5).

Abstract: An object of the present invention is to install an anchor bolt with sufficient strength without lowering strength even when a reinforcing member exists. According to the present invention, in a method of installing an anchor bolt in a fixing surface, first, a first fixing hole for fixing the anchor bolt is drilled in the fixing surface. Then, a second fixing hole is drilled from a distal end portion of the first fixing hole in an inclined state. Afterward, an anchor bolt bent at a middle portion thereof is fixed to the first fixing hole and the second fixing hole.

Abstract: A fastener that includes a head part having an internally threaded hole extending from one side of the head part to another side of the head part, an externally threaded shank in threaded engagement with the internally threaded hole of the head part, the shank being externally threaded for threaded engagement with a nut, and an externally threaded locking part in threaded engagement with the internally threaded hole of the head part, wherein the shank and the locking part are in contact with each other inside the threaded hole, such that the locking part resists against travel of the shank through the threaded hole.

Abstract: A torque resistant self-attaching fastener having a tubular barrel portion and a radial flange portion including a plurality of circumferentially spaced radial projections each having opposed planar generally radial side faces with the outer surface of the radial flange between the radial projections having a greater circumferential width than a circumferential width of the radial projections and a radial length less than the circumferential width. The side faces may be aligned with a radius, the side faces may be parallel or the side faces of adjacent radial projections may be parallel.

Abstract: A fastening structure including a first housing, a substrate, a second housing, and a fastening component is provided. The first housing has a first boss with a first opening, and a sidewall of the first opening is made of metal. The substrate has a second opening. The second housing has a second boss with a third opening. One end of the fastening component passes through the third opening and is fastened in the first opening, and the other end of the fastening component is restricted in one end of the third opening to fasten the substrate between the first housing and the second housing. Both the metal sidewall and the sidewall of the fastening component therein do not contact the substrate.

Abstract: A retaining structure and fastener assembly for securing a resin panel to a vehicle body. The panel has an inner surface and a retaining structure extending outwardly from the inner surface. The retaining structure has a retaining wall with a slot for receiving a shoulder of a bolt therethrough, so that a head of the bolt is retained between the inner surface and a washer for securing the panel to the body of the vehicle. The slot is oversized relative to the shoulder of the bolt so as to define a predetermined gap therebetween to accommodate thermal expansion and contraction of the panel, thereby preventing building of the panel relative to the vehicle.

Abstract: A self-attaching fastener and panel assembly wherein the free open end of the tubular barrel portion is coined, collapsed axially, flattened and deformed radially inwardly and outwardly and axially against a panel surrounding the panel opening. The method of installation includes driving the free end of the tubular barrel portion against a substantially planar die surface, deforming an end portion radially, then collapsing an intermediate portion over the radially deformed end portion, flattening the end portion, substantially thickening the tubular barrel portion and forming an annular surface engaging and supporting the panel surrounding the opening. The die member includes an annular moat surrounding a central die post and a planar die surface extending generally perpendicular to the axis of the die button.

Abstract: The invention relates to a function element (10) comprising a head part (14) with an annular bearing surface (12) and tubular rivet segment (16) that is provided on the side of the bearing surface of the head part and that extends away from said head part. The invention is characterized in that a tubular guide segment (18) is concentrically disposed relative to the tubular rivet segment and radially inside said rivet segment, wherein an annular gap is provided between the guide segment and the rivet segment and the guide segment projects beyond the free end of the rivet segment.

Abstract: A fastener assembly for securing a heat dissipation device to a CPU mounted on a printed circuit board, includes a sleeve, a bolt, and a coil spring. The sleeve includes a hollow body, a top head and a pair of lower resilient flat extensions. The resilient flat extension has a barb projecting outwards therefrom and is deformable radially. The bolt includes a shaft, a joining part at an end thereof and a threaded part formed at an opposite end thereof. The shaft is received in the hollow body of the sleeve with the joining part fastened to the hollow body, whilst the threaded part projects out of the hollow body. The coil spring surrounds the sleeve and is held between the head of the sleeve and the barbs of the sleeve; the coil spring is deformable axially along a length of the sleeve.

Abstract: A functional element (10), for fixing to a piece of sheet metal (40), such as for example, a nut element or a bolt element with a body section or head section, comprising an annular flange (14) which transforms into a cylindrical rivet section, is characterised in that the transformation from annular flange into the rivet section is formed by an at least essentially conical surface, forming a contact surface for a corresponding conical region of a piece of sheet metal, which, on fixing the functional element to a piece of sheet metal, is clamped between the side of the annular flange facing the rivet section and an annular bead (50) formed from the rivet section. An assembled component and a method for the fixing of a functional element are also disclosed.

Abstract: A screw anchor includes a roughly cylindrical body (1) with a drilling portion (3) provided, at its free end, with drilling teeth (14-16), at the other end of the body, a bearing flange (5) and an external screw thread (7). The drilling portion (3) is configured as a portion of a drill bit.

Abstract: A male fastener formed of heat treated carbon steel for high performance applications, including a shank portion, radial flange and tubular barrel, wherein the barrel has an axial length of 60% or less than the outside diameter and a fastener and panel assembly, wherein the distal open end of the barrel is deformed into an L-shape and the panel is deformed by the radial flange into an L-shape having an inwardly projecting portion deformed between the radial flange and the outwardly deformed distal end of the barrel.

Abstract: A captive screw for use in electronic assemblies includes a screw with a shaft having a pair of spaced grooves and a cover captivating the screw and for attaching the captive screw. A knob for rotating the screw can be moved along the shaft between an extended position and a lowered position corresponding to the grooves on the shaft, and releasably locked to the shaft in either position. A lock wafer is used to secure the knob to the shaft. A release button with a large head actuates the lock wafer.

Abstract: A method of assembling a captive panel fastener to a printed circuit board comprises the steps of placing an axially-extending shank of a captive fastener retainer through a mounting hole in a printed circuit board, soldering the retainer to the printed circuit board, cooling the retainer, and then affixing a retractable screw assembly including a plastic screw cap to the retainer by snap attachment of the screw cap to an outside surface of the retainer.

Abstract: A telescopic captive fastener has a knob, a ferrule, a spring, and at least one sleeve. The sleeve extends telescopically between the ferrule and the knob.

Abstract: A fastening element capable of being attached to a panel by deforming the panel is disclosed. A barrel portion is tubular with an open free end and has an axis defining a circumference. A radial flange portion is integral with the tubular barrel portion opposite the free end and defines a circumferential surface. The radial flange portion includes a plurality of projections spaced apart and extending outwardly from the circumferential surface. Each of the projections defines at least one wall generally perpendicular to the circumference about the axis of the barrel portion.

Abstract: A fastening structure capable of preventing deterioration in the flatness of a surface of a flange portion (2) when a serration (7) of a bolt (5) is press-fit into the flange portion (2). In this fastening structure, one portion in an axial direction of an outer peripheral surface (6) of the bolt (5) is provided with the serration (7). The bolt (5) is press-fit into a bolthole (3) formed through the flange portion (2) of a mounting member (1). The serration (7) is located apart from respective end surfaces (2A) and (2B) of the flange portion (2) by first and second distances (D, C), and the first and second distances (D, C) each exceed 13% of the thickness (A) of the flange portion (2). With this arrangement, the serration (7) presses a bolthole inner peripheral surface (13) only in the region located far apart from both of the end surfaces (2A and 2B) of the flange portion (2).

Abstract: A locator stud including a shank and a flange portion integral and coaxially aligned with the shank and a bearing surface between the shank and the flange portion, a method of installation in a panel, including forming an opening in the panel, inserting the flange portion into the panel opening and driving a plunger having an opening receiving the shank, a first annular die surface deforming the bearing surface radially outwardly and a second projecting annular die surface deforming the panel radially inwardly into a concave outer surface of the flange portion and wherein the panel of the locator stud and panel assembly includes a V-shaped depression surrounding the locator stud.

Abstract: A blind rivet (1) includes a rivet body (3) having a rivet body flange (2) integrally formed therewith, and a mandrel (5) passing through the rivet body and protrudes from the rivet body flange. The mandrel (5) has a large diameter head (6) at the end of the rivet body on the opposite side of the rivet body flange. An external thread portion (13) is provided in a region of the mandrel adjacent to the rivet body flange (2). A sleeve (14) is formed separately from the mandrel (5) and the rivet body (3), and is disposed adjacent to the rivet body flange (2). The sleeve (14) includes a sleeve flange (15) for sandwiching a second attachment member (22) between the sleeve flange and a first attachment member (21), and a deformable swageable portion (17) to be deformed radially in a region of the external thread portion, so as to form an internal thread portion (33) in the inner surface thereof. The rivet body (3) and the mandrel (5) are retained as attached to the first attachment member.

Abstract: A fastener is configured for use in the manufacture of molded plastic components that will be subsequently attached to other components by the fastener. The low profile head portion of the fastener has a rounded contoured and convoluted top surface to facilitate the flow of plastic material around the head portion during the molding process. The underside of the head portion is formed with a square face surrounded circumferentially by circumferential land surfaces that provides a high pull-out force resistance for the fastener. The square face on the underside and convoluted top surface of the head portion provides a high spin-out torque resistance without sacrificing the pull-out force resistance. The rounded edges of the head portion are compatible with molding processes to allow the flow of plastic material to fully encapsulate the head portion within the molded plastic component.

Abstract: A fastener assembly including a stud and plate combination is disclosed for fastening a first member to a second member. The assembly comprises a stud which includes a shank having a first and a second end. A head extends from the first end of the shank, the head defining a surface which is disposed adjacent to the first end of the shank. A plate has a first and a second face, the plate defining a slot for the reception therein of the head of the stud. The arrangement is such that when the head is inserted through the slot and is rotated relative to the plate, the first face of the plate slidably cooperates with the surface of the head. The head and the plate are configured and adapted in such a manner that when the head is rotated to the plate, the stud is securely fastened to the plate, thereby allowing the first member to be attached to the second member.

Abstract: The invention concerns a functional element, in particular a bolt, consisting of a shank portion (14) and a head portion (16) designed to be assembled riveted with a plate element, in particular a sheet metal part. The invention is characterised in that the head portion (16) is hollow and has practically the same external diameter as the shank portion. When mounted, the hollow head portion (16) of the functional element (10) forms a riveting edge (37) on one side of the sheet metal part and an annular groove (52) on the other side of the sheet metal part, the annular groove (52) acting as a flange. The invention further concerns a method for fixing the functional element in a sheet metal part and the resulting assembling element (16), as well as a matrix and a swaging assembly.

Abstract: A fastener, for use with a sheet-shaped member, comprises a tubular shank, a plurality of holding pieces extending outward from a first end of the shank, a flange extending outward from a second end of the shank, and a plurality of stud-engagement pawls extending into the interior of the shank. The shank has a length less than that of a stem of a stud fixed to a mounting member with which the fastener is to be engaged. When the stud is fully inserted into the tubular shank, the sheet-shaped member is fastened to the stud and the stud stem protrudes from a surface of the sheet-shaped member. The protruding portion of the stem allows an auxiliary member to be mounted thereto.

Abstract: A pop-up fastener including a tubular retainer for one-way passage into a socket. A fastening member slidably extends through the retainer. The fastening member has helical threads at its top and a protrusion at its bottom. A compressed spring is positioned atop the retainer for urging the protrusion into engagement with the bottom of the retainer and for urging the helical threads from the top of the retainer.

Abstract: An air bag sensor module fastening device for a vehicle is provided includes a vehicle mounting structure having an internally threaded member. A sensor is secured to a base for sensing vibrations caused by a crash of the vehicle. The base has an aperture extending therethrough that is aligned with the internally threaded member. The aperture includes a retaining portion. A fastener for securing the base to the vehicle mounting structure has a shaft with a head and a threaded portion opposite the head. The threaded portion is temporarily retained within the retaining portion in a shipping position. The threaded portion has a minor diameter and the shaft portion has a shaft diameter less than the minor diameter. As a result, the shaft will not be in an interference fit relationship with the retaining portion so that the compressive load of the fastener alone secures the base to the vehicle mounting structure.

Abstract: A method and apparatus for holding a screw captive to a printed circuit board (PCB), with a channel formed through the apparatus and a mounting hole formed through the PCB being in alignment to allow a screw to pass therethrough.

Abstract: A fastening structure capable of preventing deterioration in the flatness of a surface of a flange portion (2) when a serration (7) of a bolt (5) is press-fit into the flange portion (2). In this fastening structure, one portion in an axial direction of an outer peripheral surface (6) of the bolt (5) is provided with the serration (7). The bolt (5) is press-fit into a bolthole (3) formed through the flange portion (2) of a mounting member (1). The serration (7) is located apart from respective end surfaces (2A) and (2B) of the flange portion (2) by first and second distances (D, C), and the first and second distances (D, C) each exceed 13% of the thickness (A) of the flange portion (2). With this arrangement, the serration (7) presses a bolthole inner peripheral surface (13) only in the region located far apart from both of the end surfaces (2A and 2B) of the flange portion (2).

Abstract: An alignment pin or fastener includes a radially eccentric part such that when the fastener is tightened, the eccentric part shifts radially to simultaneously align the holes of two plates in a radial direction and clamp the two plates together in an axial direction. The bi-directional fastener includes two heads at opposite ends of a shaft, wherein the two plates become sandwiched and clamped between the two heads. The shaft and the two heads remain fixed relative to each other, so turning one head turns the other. This allows the fastener to be tightened even when only one of the heads is accessible.

Abstract: A fixing element comprising a fixing section and a tubular stamped or riveted section in which the stamped or riveted section enable the fixing element to be placed on a metal part and the fixing section enables an object to be placed on the metal part. A bearing surface on a transition region between the fixing section and the stamped or riveted section extends in a radial or conical manner and optionally has torsional fixing features. The tubular stamped or riveted section free front end has a conical cutting surface which is divergent on the radially inner side in the direction of the free front end area and a rounded impact and traction surface on the radially outer side. The cutting, impact and traction surfaces meet at an annular edge on the free front end of the stamped or riveted section and are shaped to prevent shavings from occurring.

Abstract: The invention relates to a fixing element (10) for double pane insulating glass (42, 44), which is anchored by expansion of an expansible ring (16) in a drilled hole having a conical undercut in an outer glass pane (42) of the insulating glass (42, 44). The invention provides for the fixing element (10) to be sealed with two sealing rings (30, 40) on both sides of an inner glass pane (44) of the insulating glass (42, 44) and additionally for an injection opening (41) to be provided, through which a sealing compound, for example, silicone, can be introduced into a gap at the point at which the fixing element (10) passes through the inner glass pane (44) in order to provide an extra seal at the passage point. The fixing element (10) ensures a permanent seal of the passage point.

Abstract: The invention relates to a fixing element (10) for anchoring in a drilled hole (30, 32) having an undercut (28) in a laminated body (24, 26), for example, laminated glass. The fixing element (10) has an expander cone (14), onto which an expansion ring (16) can be pushed. To be able to compensate for misalignment between the layers (24, 26) of the laminated body (24, 26), the drilled hole (30) in an outer layer (24) is drilled with a larger diameter than in a further layer (26) of the laminated body (24, 26). The invention proposes constructing a washer (18) of the fixing element (10) with an injection opening (22), through which the gap between a threaded shank (12) of the fixing element (10) and the wall of the drilled hole (30) in the outer layer (24) of the laminated body (24, 26) can be filled with a sealing compound (26)2. (FIG. 2).

Abstract: An anchoring screw with triple threads of different depths of thread especially useful for coupling with a construction hole on a cement wall (or other construction boards and panels) includes a first bolt section, a tool driven section and a second bolt section. The second bolt section has a first screw thread, a second screw thread and a third screw thread of different depths of thread formed on the outer surface that are spaced from one another at 120 degrees. Thus, the screw threads can gather extruded cement debris when the screw is fastened into the construction hole to produce a stronger fastening effect. As there is no expansion incurred, the wall or board does not crack. Therefore, the interval between the construction holes may be shortened, and the number of construction holes may be increased in a given unit area. The anchoring screw of the invention also may be removed easily and conveniently to facilitate construction.

Abstract: The invention comprises a tolerance compensating mounting device comprising a bushing having an internal and external thread. The bushing is threaded into a part to be mounted to a surface. A bolt is then threaded into a bushing bore using the internal threads. The internal threads cause an interference fit between the bolt shank and the threads, temporarily preventing further insertion of the bolt. The bolt is then turned further, thereby turning the bushing and causing the bushing to unscrew from the part toward the mounting surface until the bushing seats on the mounting surface, thereby completely compensating for a tolerance gap. As the bolt is turned further, at a relatively low torque the sacrificial internal threads are stripped allowing the bolt to be fully torqued into the mounting surface hole, thereby simultaneously connecting the components with a properly torqued connection while compensating for a tolerance gap.

Abstract: An arrangement for attaching an assembly component with variable spacing to an understructure with the aid of a fastening element is provided. The fastening element comprises a fixing bolt, a spacer element with a cylindrical outside surface and an elastomeric sleeve. The fixing bolt is embraced by the cylindrical outside surface of the spacer element and is provided on one end with a radially overhanging head with a larger outside diameter than the spacer element and on the other end with a fixing section that interacts with a counter element. The elastomeric sleeve encloses the spacer element, is positioned inside a bore of the assembly component and is longer than the spacer element, wherein the elastomeric sleeve can be displaced axially relative to the bore in the assembly component as well as relative to the spacer element.

Abstract: A fastener (10) being pressable into a metal sheet in a way safe against rotation and pressing out having a head (12), the side of which after insertion facing the metal sheet is having radially positioned ridges (22), which, when setting the fastener (10), are pressed into the metal sheet, wherein a cylindrical thread-carrier (14) is positioned in the centre of said ridges (22) projecting through the metal sheet beyond the other side of the metal sheet and which in the vicinity of the side of the head (12) facing the metal sheet in the set state is having a surrounding annular recess (20) into which the material of the metal sheet displaced during the setting can be pressed.

Abstract: A two-piece panel fastener includes a barrel-shaped metal retainer which holds a screw. The screw includes a threaded shaft and a plastic cap which has longitudinally-extending resilient fingers which engage the outer surface of the retainer to captivate the screw. The retainer has a chamfered top flange along its top edge, a circumferential bulge area around its outer surface approximately in the middle of its length, and a base at the bottom. Two circumferential valley regions of reduced diameter are located along the outer surface of the retainer. The first valley region is located between the chamfered top flange and the bulge area and the second is located between the bulge area and the base. When the fingers occupy either of the valley regions, the screw is captively held at either of two stable positions of retraction or extension. The retainer is preferably rigidly affixed to a circuit board by soldering a base flange at the bottom of the retainer to the top surface of the board.

Abstract: An air bag sensor module fastening device for a vehicle is provided includes a vehicle mounting structure having an internally threaded member. A sensor is secured to a base for sensing vibrations caused by a crash of the vehicle. The base has an aperture extending therethrough that is aligned with the internally threaded member. The aperture includes a retaining portion. A fastener for securing the base to the vehicle mounting structure has a shaft with a head and a threaded portion opposite the head. The threaded portion is temporarily retained within the retaining portion in a shipping position. The threaded portion has a minor diameter and the shaft portion has a shaft diameter less than the minor diameter. As a result, the shaft will not be in an interference fit relationship with the retaining portion so that the compressive load of the fastener alone secures the base to the vehicle mounting structure.

Abstract: A retention structure includes a retainer housing for retaining an object, such as a fastener, commonly used to secure trim panel to an inner vehicle panel. The retainer housing is defined by a first sidewall, a second sidewall, a back wall, and a base. The first sidewall, the second sidewall and the back wall extend from a substrate to the base. The base includes an insertion slot and a retention portion for retaining the fastener. The retention portion includes at least one cutout for increasing the flexibility of the base. The retainer housing also includes a holding arm integral to the retainer housing. The holding arm acts provides a biasing force on the fastener once the fastener is inserted into the retaining portion and restrains lateral movement of the fastener. This abstract submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A captive screw including a screw and a ferrule is disclosed. One end of the ferrule is adapted for engagement to a hole in a panel to be secured by the captive screw. The screw has an annular flange that is captured within the bore of the ferrule. The screw has a shaft with a threaded portion. The threaded portion of the screw shaft can be made to extend from the ferrule to varying amounts as the screw is moved relative to the ferrule between extended and retracted positions. An optional spring may be provided in the ferrule to bias the screw toward the retracted position.

Abstract: A cage for a cage fastener includes a base and sides, with a flap integral with one side bendable to be disposed in spaced relation to the base and overlying the base. A distal edge of the flap and a distal edge of one of the sides define a cooperating locking structure whereby the position of the flap relative to the side can be secured, with a fastener positioned between the flap and the base.

Abstract: An air bag sensor module fastening device for a vehicle is provided includes a vehicle mounting structure having an internally threaded member. A sensor is secured to a base for sensing vibrations caused by a crash of the vehicle. The base has an aperture extending therethrough that is aligned with the internally threaded member. The aperture includes a retaining portion. A fastener for securing the base to the vehicle mounting structure has a shaft with a head and a threaded portion opposite the head. The threaded portion is temporarily retained within the retaining portion in a shipping position. The threaded portion has a minor diameter and the shaft portion has a shaft diameter less than the minor diameter. As a result, the shaft will not be in an interference fit relationship with the retaining portion so that the compressive load of the fastener alone secures the base to the vehicle mounting structure.

Abstract: A front mounted retaining mechanism including a retention device and a captivatable device. The retention device has a head and a hollow shank. The head or the shank may include inwardly directed threads. The shank may include outwardly directed threads to facilitate mounting within a structure. The captivatable device includes a head and a shank, with the shank including a portion having a greater diameter than the remainder of the shank. That portion may be threads or a retainer ring. The captivatable device is threaded into the retention device in such a way as to allow its captivation therein. Then the first structure is aligned with a second structure into which the captivatable device is mounted.

Abstract: A fastener assembly has a two part fastener and a pin. The two part fastener interlocks with each other for mounting on a vehicle and sandwiching at least two panels therebetween. The two part fastener has an aperture extending therethrough. The pin interlocks with the two part fastener for mounting a sandwiching at least one other panel to the first two panels.

Abstract: A bolt retention assembly comprises a first component defining a hole. The hole has a threaded bore defining a bore diameter and a counter-bore defining a counter-bore diameter greater than the bore diameter. The threaded bore and counter-bore define a relief therebetween. A bolt having a shank portion and a threaded portion extends through the first component wherein the threaded portion is threadingly engageable with the threaded bore and abuttable with the relief to prevent the bolt from being removed from the hole after the threaded portion is rotatably threaded past the threaded bore.

Abstract: A tubular-frame structure for supporting surfaces comprising a supporting surface (12, 12′), a flat frame (13) and legs (14), in which said frame (13) is composed of tubular profiles (15) which can be combined in various ways, characterised in that all the elements are joined through connection means which provide a firm and dismountable connection, constituted by devices (16) for coupling tubular profiles (15) and devices (17) for coupling tubular profiles (15) with a leg (14).