Abstract: An arrangement is for securing a nut on a threaded bolt comprising a bolt shaft projecting from a bolt head and being provided, in an opposite end portion, with a first threaded portion arranged to engage with an internal threaded portion of the nut. The nut and the bolt head are arranged to abut against adjacent elements. A nut-locking element is provided with a threaded portion arranged to engage with a second threaded portion of the threaded bolt. The second threaded portion is arranged externally on a stepped end portion of the threaded bolt and is concentric with and having a smaller pitch than the first threaded portion. The nut-locking element is provided with a friction portion arranged to rest supportingly against a corresponding friction portion on the nut.

Abstract: A bushing assembly comprises a bushing element having a first surface, which is adapted to come into contact with a shoulder, and a threaded hole, which defines and axis and is adapted to be engaged by a screw; and a cage element, which is fitted around the bushing element so that the bushing element is supported and is floating; the cage element is adapted to be fixed to the shoulder and is provided with at least one opening; the opening defines an end abutment of the cage element; the bushing element comprises at least one stop portion, which engages the opening with an angular clearance and is movable around the axis at least between a first angular position, in which the stop portion is spaced apart from the abutment, and a second angular position, in which the stop portion is in contact with the abutment so as to prevent the bushing element from rotating past the second angular position; the stop portion is defined by an appendage element, which is distinct from the surface and the surface is circular.

Abstract: A nut for joining conduits includes a body having a generally cylindrical shape and defining a central opening. A plurality of lugs can extend outwardly from an outer surface of the body and provide one or more strike surfaces. The central opening can include a threaded portion proximate a first end of the nut and a tapered portion extending from the threaded portion. The tapered portion defines a frustoconical surface that expands the central opening beyond the threaded portion. The tapered portion may terminate at an undercut or flange proximate the second end of the nut.

Abstract: The teachings herein are related to assemblies, such as oil pan assemblies, including a laminate bottom portion and a nut attached to the laminate bottom portion. The nut may provide a sealable opening to a cavity of the assembly. The laminate bottom portion preferably includes a polymeric layer sandwiched between two metallic layers. The nut preferably is a clinch nut.

Abstract: The invention relates to a connection system for connecting at least two plate-like elements, the connection system having a bolt, a nut that corresponds to the bolt and has a screwing channel which extends along a screwing axis and into which the bolt can be screwed, and a cage for receiving the nut, wherein the nut has a foot portion and a head portion adjoining the foot portion along the screwing axis, the foot portion projecting, at least in portions, beyond the head portion in a direction perpendicular to the screwing axis.

Abstract: A panel fastening system includes a panel having a visible side and a rear side, at least one slot which is introduced into the rear side of the panel and which extends along a longitudinal axis, and which has at least one stop face, wherein a first slot portion extends between the at least one stop face and the rear side, and wherein a second slot portion extends between the at least one stop face and the slot base, and at least one fastening element which is inserted into the slot and which has a fastening portion and a contact face, wherein the contact face of the fastening element abuts against the at least one stop face, wherein the panel fastening system further comprises at least one securing element which can be arranged in the slot to secure the fastening element.

Abstract: A nut-cage system has a nut cage having a base plate and two wings extending from the base plate on opposite sides of the base plate. The wings and base plate form a U-shape, each wing having a slot formed therein, and a fastener aperture is formed through the base plate. A snap-in threaded nut has a pair of tabs extending from a base thereof. A clip-retained threaded nut has a flange extending from a base thereof and is configured for use with a retainer clip. The slots are sized for receiving the tabs of the snap-in nut when the snap-in nut is installed in the nut cage and for receiving portions of the retainer clip when the clip-retained nut and retainer clip are installed in the nut cage, thereby retaining a selected one of the nuts within the cage.

Abstract: A floating fastener comprises a retainer and a captive nut held within a cavity of the retainer. The nut is star-shaped with four points spaced equally apart and with four valleys on the periphery of the nut between the points creating the overall star-shape of the nut. Likewise, the cavity in the retainer corresponds to the shape and contour of the nut but sized so that there is a substantial gap between them. Permissible lateral float of the nut can be maximized by employing a particular angularity of the sides of the valleys in relation to other dimensions of the fastener.

Abstract: In one embodiment, an apparatus may comprise an attachment device configured to be embedded in a structure, wherein the attachment device comprises: a body comprising a first flange and a second flange, wherein the body is configured such that the first flange and the second flange are coupled together internally within the body when the attachment device is embedded in the structure; an attachment fitting for coupling a component to the structure in which the attachment device is embedded.

Abstract: A holder is provided to be used with a fastener that includes a pivot nut. The holder includes a flange plate, and a pair of substantially U-shaped arm plates disposed on respective opposite sides of the flange plate. The arm plates hold the pivot nut so that the pivot nut is pivotable and movable relative to the flange plate. The flange plate has a threaded member insertion hole through which a threaded member is inserted. The two arm plates are arranged at different distances from the center axis of the threaded member insertion hole.

Abstract: Interchangeable inserts are disclosed for use in enclosures, such as underground enclosures. The interchangeable inserts include insert bodies that are configured to house stand-alone nuts and nuts contained within removable trays.

Abstract: A snap-together fastening device includes a holding element and an actuating element. The holding element has one or more fixing arms that are actuatable from a mounting position into a fixing position. The actuating element is pluggable into an opening of the holding element, and has a top end and a bottom end. The actuating element deflects, in its position in which it is plugged into the holding element, at least one fixing arm into a fixing position. In its position in which it is plugged into the holding element an outermost edge of the actuating element, that is in the region of the top end, contacts an inner surface of the at least one fixing arm.

Abstract: A switchable one-way clutch is able to switch between operating as a one-way clutch and a clutch that locks in both directions. The clutch includes an inner race, and an outer race that includes an inner surface with a plurality of ramped profiles. A control plate is located radially outward from the inner race and moveable in an axial direction relative to the outer race. A plurality of rollers are contactable with the outer and inner races. A roller cage is configured to position and contain the plurality of rollers. A hydraulic piston is coupled to an actuator arm, such that movement of the piston along the axis moves the actuator arm along the axis. To switch and engage the clutch such that rotation is locked in both directions, the piston and actuator arm move axially to hold the control plate and attached roller cage against rotation.

Abstract: A fitting assembly for receiving and restraining a stud includes a sleeve defining a bore extending along a longitudinal axis of the fitting assembly. The sleeve includes one or more restraining members that selectively restrain the stud within the bore such that an axial position of the stud is limited to a selected one of a plurality of positions within the bore. The one or more restraining members are moveable between a first position and a second position, wherein axial movement of the stud within the bore is inhibited when the one or more restraining members are in the first position, and wherein axial movement of the stud is permitted when the one or more restraining members are in the second position. A clamp attachable to the one or more restraining members prevents movement of the one or more restraining members from the first position to the second position.

Abstract: A nut and support element assembly structure includes: a nut having a screw hole, an end side, and a lateral side; a support element having a bottom resting portion, two end side abutting portions disposed at the end sides of the nut, respectively, and two lateral side clamping portions connected to the end side abutting portions to clamp the nut from the lateral sides. A nut and support element assembly structure includes: a nut having a screw hole, an end side, and a lateral side; a support element having a bottom resting portion, two end side abutting portions disposed at the end sides of the nut, respectively, and two lateral side clamping portions connected to the bottom resting portion to clamp the nut from the lateral sides. A screwing-fixing assembly for use with the nut and support element assembly structure is further provided.

Abstract: The invention relates to a backing plate used for an elastomeric bearing system, the backing plate comprising a plate which defines an at least partial annulus about an axis, a motion limiter and a redundant pivot which extend from the plate so as to respond to a retainer plate disbond.

Abstract: An electrically insulating cage nut (10) having a nut body (12) which is held in a cage (14), in which the nut body (12) has a cylindrical attachment (16) and a broadened holding element (18), and the cylindrical attachment (16) has an internal thread (20) and extends through an opening (22) in the cage (14) to the outside, wherein the internal diameter of the opening (22) is substantially larger than the external diameter of the cylindrical attachment (16), but is smaller than the external size of the holding element (18), and an insulator apparatus (24) is arranged between the cage (14) and cylindrical attachment (16), wherein the insulator apparatus (24) is formed integrally, and in consequence the cage nut (10) consists of only three components (12, 14, 24).

Abstract: An encapsulated retainer comprises a barrel that defines a fastener-securing void. The barrel has a flange that extends about its periphery. The encapsulated retainer further comprises an outer shell that has a top wall with a fastener-receiving aperture and a bottom wall that has a barrel-receiving aperture. The barrel extends into the barrel-receiving aperture. The encapsulated retainer further comprises first and second side walls which connect the top wall with the bottom wall. A connecter connects the outer shell with the flange.

Abstract: A ceramic fastener includes a ceramic body portion, and a containment layer disposed around the ceramic body portion. The containment layer retains pieces of the ceramic body portion when the ceramic body portion is subjected to a torque sufficient to fracture the ceramic body portion. The fastener can be a nut, and the containment layer can be disposed around one or more of the top, bottom and side surfaces of the nut. The containment layer can be a metal shroud having a thickness from 0.01 to 0.125 inches. The ceramic body portion can be alumina or zirconia. A thread insert may be disposed within a fastener bore of the ceramic body portion.

Abstract: A nut plate assembly includes a nut retainer and a bushing for expanding a tubular body of the retainer. The retainer assembly is used to cold work an opening of a workpiece in order to fix the nut retainer assembly relative to the workpiece. A nut can be snapped into the retainer. A method of installation includes passing a mandrel through the bushing to radially expand the bushing into a tubular body of the retainer. The tubular body is compressed between the workpiece and bushing as the bushing is displaced radially causing corresponding radial displacement of the tubular body. The expanded bushing applies pressure to the tubular body for a desired fit between the nut retainer and workpiece.

Abstract: In one embodiment, the present invention includes a toggle bolt suture anchor system including a toggle bolt suture anchor having at least one groove; and a toggle bolt delivery device having at least one push pin for pivotable interconnection with the groove.

Abstract: The method and device provided herein relates to the field of screwed joints for panels and, in particular, for sandwich panels used in aerospace applications. It relates to a method for attaching a headless rivet nut to a wall of such a panel. The method comprises: injecting a predetermined quantity of adhesive into a blind hole made in the wall of the panel; fitting the headless rivet nut onto a rivet nut setting tool, the rivet nut setting tool comprising a pierced anvil and a mandrel passing through the anvil, the mandrel being screwed into the rivet nut so as to press the rivet nut onto the anvil; positioning the headless rivet nut in the blind hole, the anvil coming to press against the wall of the panel; setting the rivet nut so as to squeeze the wall of the panel between the anvil and a flange formed by deformation of the rivet nut.

Abstract: The invention relates to a rivet nut (10) with a base part (12) and a cylindrical rivet section (14), the base part having a central threaded cylinder (16), an annular contact surface (18) that is coaxial to the threaded cylinder in a plane (20) perpendicular to the longitudinal axis (22) of the threaded cylinder, and that has an axially aligned annular groove (24), said groove being arranged radially inside the annular contact surface and radially outside the cylindrical rivet section and said groove blending on the radially inner side, into the outer surface of the cylindrical rivet section, and anti-rotation ribs (42) being provided in the area of the annular groove.

Abstract: A functional element having a functional portion, a generally tubular rivet portion and a ring-like sheet metal contact surface is characterised in that features of shape are provided at the rivet portion for co-movement of the sheet metal part during the formation of the rivet bead, in particular at the free end of the rivet portion and/or at the radially outer side of the rivet portion, at least in the region adjacent the free end of the rivet portion. A component assembly comprising a functional element and a sheet metal part as well as a method for the attachment of a functional element to the sheet metal part are also claimed.

Abstract: A threaded fastener includes a head, a threaded shank extending from a bottom face of the head along a longitudinal axis of the fastener, and an annular flange oriented transverse to the longitudinal axis and surrounding the bottom face of the head. A surface has a receiving hole in which the shank of the threaded fastener is disposed with the bottom face of the head contacting the surface. The surface further has a crimping recess spaced apart from the receiving hole. A portion of the annular flange overlaps and is deformed into the crimping recess. The fastener may be a screw or bolt. In the case of a bolt, a nut engages the distal end of the threaded shank. The nut also includes an annular flange that is deformed into a crimping recess on a surface proximate to the nut.

Abstract: The invention relates to a rivet nut (10) with a base part (12) and a cylindrical rivet section (14), the base part having a central threaded cylinder (16), an annular contact surface (18) that is coaxial to the threaded cylinder in a plane (20) perpendicular to the longitudinal axis (22) of the threaded cylinder, and that has an axially aligned annular groove (24), said groove being arranged radially inside the annular contact surface and radially outside the cylindrical rivet section and said groove blending, on the radially inner side, into the outer surface of the cylindrical rivet section, and antirotation ribs (42) being provided in the area of the annular groove.

Abstract: A cage nut includes a substantially rectangular base portion, two sidewalls, two stopper portions, two arm portions, two clamping portions, and a nut. The sidewalls extend from two opposite edges of the base portion. Each stopper portion extends from an end of a corresponding sidewall away from the base portion. The two stopper portions extend toward each other. Each arm portion extends outwardly from an end of a corresponding stopper portion. Each clamping portion extends from an end of a corresponding arm portion and includes a first side edge and a second side edge. The first side edge and the second side edge are arranged in an angle. The angle is equal to or less than about degrees. The clamping portions extend away from each other. The base portion, the two sidewalls and the two stopper portions define a receiving space. The nut is received in the receiving space.

Abstract: An insert for blind installation in a workpiece, and method of manufacture of an insert, the insert (2) comprising a body (4) and anchor stud (6); wherein the stud is inserted into a through bore (22) in the body, part of the stud extending beyond the end of the through bore, and a part of the stud provided with opposed areas of knurling (14, 16) such as threading, being enveloped by a reduced diameter section (24) of the body, such that crimping the stud onto the body causes material to enter the knurling, thereby firmly attaching body and stud, allowing the insert to withstand high torque.

Abstract: A stack or assembly of fluid, mechanical, and/or electrical components permits removal of some components for maintenance, without compromising the fluid integrity of the remainder of the assembly. A fastening bolt, attached to at least one fluid component, is screwed into a stacking bolt, attached to another fluid component, the bolts being screwed together inside the bore of an adapter plate. A resilient insert sits between the head of the stacking bolt and the bore. At least a portion of the bore has a continuous taper, such that the diameter of the bore decreases in the vicinity of the insert. The taper creates a reduced diameter hole on one surface of the adapter plate, thus preventing interference between fluid ports on an adjacent fluid component. The taper also prevents loss of the insert during transportation and storage, and prevents undesired extrusion of material of the insert when the components are fastened together.

Abstract: In a bi-directional overrunning clutched differential unit, a pair of coaxial hubs are relatively unrotatably fitted on respective coaxial output shafts, and are relatively rotatably inserted into a cage holding rollers. A pair of second bearings journal a clutch housing disposed around the cage is diametrically larger than a pair of first bearings journaling the respective hubs, and are disposed between the first bearings in the axial direction of the output shafts. An axial end portion of the cage and the second bearing on the same axial side are distant from the first bearing on the same axial side so as to have a space where a friction mechanism for applying a frictional rotation resistance onto the cage is disposed.

Abstract: A fastener retainer is provided capable of retaining a fastener to a part prior to and during assembly. A first portion engages a fastener flange while leaving a fastener head exposed for assembly tool access. A second portion has flanges that engage the edges of the part.

Abstract: A rivetless nut plate assembly, which is fully preassembled, which can be installed into an aperture of a hard metal material workpiece having a hardness of at least 25 Rc, such as Titanium and Steel Alloys. The rivetless nut plate assembly includes a nut, a holding bracket, a retainer, and a sleeve member. Additionally, a stem is used to install the rivetless nut plate assembly. The sleeve member is configured such that the nut plate assembly can be installed in a hard metal material workpiece. The sleeve member may be formed of a high strength, but ductile material, such as Titanium Columbium, Monel, soft Nickel alloys or soft Titanium alloys.

Abstract: A mounting system for a component to be mounted to a vehicle frame is provided utilizing keyhole features in the component, and fasteners having sacrificial spacers in the vehicle frame. The sacrificial spacers upon the fasteners prevent them from being pushed into the vehicle frame when the component having keyhole features is placed over them. Once the keyhole features have been placed over the fasteners having sacrificial spacers, the fasteners having sacrificial spacers may be fully tightened, thereby fully contributing to the integrity of the resulting joint.

Abstract: This invention provides a fastener (20) that is adapted to be mounted in a hole provided in a wall (not shown). The improved fastener comprises: an elongated tubular body (21) having a first end (23) and a second end (24), having an outwardly-extending flange (25) adjacent the first end, having an intermediate portion (27), and having a distal marginal end portion (37) adjacent the second end, the body also having an abutment surface (32) facing toward the second end; and a member (22) adapted to be inserted into the body through the second end, the member having an abutment surface (40) adapted to bear against the body abutment surface, and having an outer polygonal surface (41); and wherein the body marginal end portion (37) is adapted to be plastically deformed about the member to hold the member within the body.

Abstract: There is provided a nut having a thread portion having a female thread, a metallic plate portion having a base segment, and a hardness gradient portion provided between the thread portion and the metallic plate portion. The thread portion, metallic plate portion and the hardness gradient portion are monolithic each other, a metallographic structure of the metallic plate portion differs from a metallographic structure of the thread portion and a hardness of the hardness gradient portion is lower than a hardness of the thread portion and lowers from the thread portion toward the metallic plate portion.

Abstract: This disclosure relates to a pre-assembled fastener assembly having a retainer, a nut member, and a cold expansion mandrel that is forcibly removable after the assembly is installed into an opening of a structural workpiece. The mandrel is captured between a portion of a retainer and a portion of a nut member. The forced removal of the mandrel expands the retainer into the opening, securing the fastener assembly therein. The assembly may also include a cap coupled to the retainer to seal the opening in the structural workpiece. The nut member can be fixed or free-floating with respect to the retainer. In addition, the nut member can be threaded to receive a fastener. The mandrel is recyclable or disposable.

Abstract: A nutmount apparatus includes a sleeve, a bushing insertable into the sleeve and a nut. The nutmount apparatus may further include a nut retainer for holding an internally threaded nut. The nutmount apparatus may be used, in conjunction with a threaded screw or bolt, to secure a first structure, such as an aircraft wall or cover panel, to a second structure, such as an aircraft frame.

Abstract: A rivetless nut plate assembly, which is fully preassembled, which can be installed into an aperture of a composite material workpiece, such as a carbon fiber structure, without risking delamination of the workpiece. The rivetless nut plate assembly includes a nut, a holding bracket, a retainer, and a sleeve member. Additionally, a stem is used to install the rivetless nut plate assembly. The sleeve member is configured such that the nut plate assembly can be installed in a composite material workpiece without risking delamination. The sleeve member may be formed of 45Cb-55Ti Titanium Columbium, as Titanium Columbium is a high strength and ductile material that resists corrosion in the presence of, for example, a carbon fiber composite structure. Monel, Titanium alloys, and other soft Nickel alloys are also good material selections for the sleeve, for similar reasons.

Abstract: A load control mechanism for use with a pull type tool, wherein the mechanism includes a telescopic housing and a compressible element, such as a polyurethane compression spring, which works to limit the ultimate load which is applied by the pull type tool during operation, such as during removal of a rivetless nut plate from a hole in parent material. Also provided is a method of removing a rivetless nut plate by using a pulling head which includes a telescopic housing and a compressible element. The load control mechanism provides that a riveter can be used to remove a rivetless nut plate without breaking a mandrel, causing undue wear on components of the tool, or damaging the parent material.

Abstract: A method facilitates assembling a gas turbine engine assembly including at least a first member and a second member. The method comprises inserting a threaded fastener through an opening formed in a flange, and providing at least one shank nut including a flanged mating end, an opposite non-mating end, and a body extending therebetween. The body includes an internal surface, an external surface, and a centerline extending between the body ends. The flanged mating end includes a substantially planar exterior surface that is aligned perpendicularly to the centerline and an annular groove that extends from the exterior surface at least partially towards the non-mating end. The method also comprises securing the assembly together such that the mating end is positioned flush against the flange and such that the threaded fastener extends at least partially into a bore extending through the shank nut and defined by the shank nut internal surface.

Abstract: An attachment device for attaching a substrate to a support structure includes a housing having a space defined by facing wall portions. The space captures a rotatable push nut with flexible teeth. The housing is attached to the substrate using a flange positioned opposite one of the wall portions, the substrate being crimped between the flange and the wall portion. The device may be pushed onto a threaded stud to rapidly affix the substrate to the support structure. The push nut may be rotated within the housing to disengage it from the stud and thereby remove the substrate from the support structure.

Abstract: A cage nut assembly includes a nut having a cylindrical portion extending from a plate portion. The nut is encaged in a cage such that the cylindrical portion extends through an aperture in the cage. The cylindrical portion of the nut is collapsible such that the nut collapses and provides a plurality of flanges upon an application of force. The flanges are folded or curved/mushroomed such that the plate portion of the nut is suspended within the cage so that the nut will not, or will minimally, stick to the cage or workpiece when coated with e-coat or ELPO. Upon torqueing a fastener into place, the flanges are bent up to allow the plate portion to interface with the cage or a workpiece to provide a solid joint.

Abstract: An anchor nut device for attachment to a structure, the device defining a threaded bore for the reception therein of a corresponding member. The device includes an anchor nut which is fabricated from a first material, the nut defining the bore and a plurality of radially extending ears. A base plate is fabricated from a second material, the plate having a first and a second face, the first face cooperating with the plurality of ears. The second face of the plate defines a plurality of dimples for facilitating welding of the plate to the structure. A plurality of arms extend from the plate, such that each ear of the plurality of ears is disposed between a corresponding arm of the plurality of arms and the first face of the plate for capturing the nut relative to the plate. Also, a stop extends from the anchor nut, the stop being disposed between adjacent ears for controlling rotational movement of the anchor nut relative to the plate.

Abstract: The “Protector Sleeve For Wires And Pipes In Wood Frame Construction” is a cylindrical grommet/bushing, that looks like a short length of pipe, that fits snugly in any hole drilled through a stud or joist in wood frame construction and which has anchors on both sides to keep it in place. When the “Protector Sleeve” is in place it shields the hole that was drilled and thereby protects the wire or pipe that the hole was drilled for from being punctured by any screw or nail that might be driven through the wall and into the stud. The “Protector Sleeve” also serves to provide a smooth surface for wires to pass through as they are being pulled through several studs at a time towards their end point. The “Protector Sleeve” also reinforces the stud where it was weakened by the hole that was drilled.

Abstract: A threaded blind insert includes a shank with an axial bore therethrough having a head at one end and a threaded region of the bore at the opposite end. The wall of the shank between its outer surface and the bore includes a weakened deformable portion created by a reduced outside diameter of the shank in that area. A reinforcement collar integral with the shank is located at approximately the middle of the deformable portion of the shank thus providing a more rigid area at the collar which creates bulges in the deformable portion on either side of the collar when the insert is compressed. A flange located adjacent the underside of the head of the insert has an outer diameter greater than the shank but less than the head. When fitted into a mounting hole of a workpiece, the flange centers the insert and provides an annular gap between the shank and the mounting hole.

Abstract: A tubular stem (14) at one end of a nut mount (10) is inserted into an opening (O) in a wall (W) and is expanded to connect it to the wall (W). An annular collar or space (16) contacts the wall (W) where it immediately surrounds the opening (O). A clip-on nut (12) is clipped onto a nut receptor (18) that is endwise outwardly of the collar (16). A pushing movement on the clip-on nut (12) moves catch tabs (54, 56) past diametrically opposite edge portions (30, 32) of the nut receptor (18), placing them into positions below the edge portions (30, 32) of the nut receptor (18). When the catches (54, 56) are so positioned, they hold the clip-on nut (12) on the nut receptor (18). The clip-on nut (12) may be a sealed nut. If so, catch tabs (54, 56) are positioned so that when they engage underneath portions of the edge portions (30, 32) of the nut receptor, a seal ring at the base of the clip-on nut (12) is compressed.

Abstract: An internally threaded blind rivet nut is provided. The nut includes adjacent a clinchable region 14 thereof a resilient collar 18 or peripheral region dimensioned such that in use, when the rivet nut is clinched, it is capable of limited axial and/or radial float.

Abstract: A tee nut includes a shaft portion and a flange portion outwardly extending from a first end of the shaft portion. The shaft portion includes a step around the periphery thereof at on an intermediate position of its axial length, a forward end side cylindrical portion having a hollow cylindrical shape located between the second end of the shaft portion and the step, and a base end side enlarged cylindrical portion having inner and outer diameters larger than those of the forward end side cylindrical portion. The forward end side cylindrical portion includes a predeterminate caulked part formed over a prescribed length from the second end and a female screw forming part between the step and the predeterminate caulked part.

Abstract: A tubular stem (16) of a bolt mount (12) is coldexpanded into an opening (70) in a wall (72). A second wall (76) is placed against the first wall (72), with an opening (70) in it in alignment with the center opening (32) in the tubular stem (16). An elongated shank portion (88) of a tubular nut (86) is inserted through the opening (70) and then through a center opening (32) in the tubular stem (16), and into an annular space (58) defined by and between a tubular sidewall (48) of a bolt-element retainer (14) and a bolt-element (54). The tubular bolt (86) has internal threads (90) that mesh with and thread onto external threads (56) on the bolt-element (54). The tubular nut (86) is rotated until a head (84) on its end is in tight clamping engagement with the portion of the second wall (76) that surrounds the opening in the second wall. Tightening of the tubular nut (86) draws the bolt-element retainer (14) and the tubular nut (86) together, firmly connecting the second wall (76) to the first wall (72).

Abstract: A thread insert comprises an externally threaded housing with an internally threaded floating nut therein. Diametrically spaced ears on the nut are engaged in diametrically spaced grooves in the housing, respectively, to limit relative rotation between the nut and the housing yet permit radial movement of the nut relative to the housing. A single split ring locks the nut into the housing.