Abstract: A jet blast wall structure is provided which is adapted to withstand and deflect high temperature jet blasts from the jet engines of aircraft. The structure comprises a plurality of panels, each of which has a front panel face and edge frame members at each side of the front panel face to which the front panel face is secured. All components, including each front panel face is made substantially of fiberglass, and each edge frame member and each bolt or nut, used for production of the structure is also made from fiberglass. The structure is designed to have a predetermined shear strength, whereby in the event of impact of an aircraft with the jet blast wall structure, the bolts in the edge frame members of the impacted panel or panels will fail in shear so as to permit the impacted panel or panels to collapse and thereby so as preclude significant damage to the impacting aircraft.

Abstract: A fastener for securing an undercover panel to an underside of a vehicle is disclosed. The fastener includes a body having a bore for receiving a threaded bolt extending from the underside of the vehicle, a flange for engaging a first side of the undercover panel, a plurality of resiliently deformable engaging fingers for allowing insertion of the bolt into the bore and to resist removal of the bolt from the bore, and a plurality of resilient engaging members for enabling the engaging members to pass in a first direction through an aperture in the undercover panel, and to resist removal of the fastener from the panel. A plurality of reinforcing members extend from the body to engage a respective engaging member, as a result of forces urging said undercover panel towards the underside of the vehicle, to resist flexing of the engaging members away from the body.

Abstract: A retractable nail includes a head portion having a striking surface and a slot through the striking face. The slot is configured for receiving a removal tool. The nail includes a piercing part the head portion and the piercing part. A longitudinal main body is positioned between the longitudinal main body includes a front side, rear side and two lateral sides. The front and rear sides include respective front and rear helical thread segments formed along a longitudinal length of the main body. The threads are filled or covered with a plastic material, epoxy, glue, composite or the like to prevent damage to the helically threads when the device is hammered or bored with a pneumatically or electrically powered nail gun into a solid material.

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

Abstract: A fastener with a breakaway and methods of using the same. In one embodiment the fastener is a screw having a head and elongated stem, adapted to be easily manipulated by a user when using the screw as a fastener in a hinge or joint. A means of holding a screw by providing a breakaway tab or non-threaded portion of the elongated stem which can be used to align and insert the screw into a screw hole in the process of engaging threads in the screw hole with threads of the screw. After engaging the threads in the screw hole, such as after the screw has been essentially completely inserted into the screw hole, the breakaway tab or non-threaded portion of the elongated stem of the screw may be broken off at a breakaway and discarded.

Abstract: A tension control fastener having a cylindrical shank having a pair of adjacent breakaway sections at one end. The outermost breakaway section engages an installation tool and shears off from the fastener at a first lower predetermined amount of torque, while the inner breakaway section shears off from the fastener at a second higher predetermined amount of torque.

Abstract: Disclosed herein is a fastener nut. The fastener nut includes a first section, a second section, and a third section. The first section has a threaded inner diameter. The second section has an outer annular groove. The third section is between the first section and the second section. The first section, the second section, and the third section are integrally formed together as a one-piece member. The second section is configured to be removed from the first section at the third section.

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

Abstract: An actuatable fastener assembly is disclosed. The actuatable fastener assembly includes a fastener body and a fastener head attached to the fastener body. An initiator is embedded within the fastener body. Activation of the initiator causes the fastener head to separate from the fastener body. The actuatable fastener assembly also includes a retainer that is slidably movable along the fastener body toward the fastener head. The retainer includes a retention feature that resists movement of the retainer away from the fastener head.

Abstract: A retaining device is designed to retain a portion of an assembly device. The portion of the assembly device is released during failure of the assembly device. The retaining device includes a fixed part, a mobile part capable of sliding with respect to the fixed part, a housing, formed with both the fixed part and the mobile part, a return device, which can be compressed during a parts assembly operation. The return device can be relaxed when the assembly device fails, which causes sliding of the mobile part with respect to the fixed part, such that the portion of the assembly device is retained in the housing.

Abstract: A fastener, such as a nail, screw, etc., which possesses supplemental support and/or retention capability is provided. The fastener includes an elongated auxiliary member secured interiorly to, exteriorly to, or along the shaft of the fastener. The auxiliary member is secured to the shaft at two or more portions of the shaft. The auxiliary member provides the shaft with additional support strength and/or enables fastened materials to be retained upon breakage or shearing of the shaft as a result of, for example, heavy tensile or shearing loads. To facilitate breakage or shearing of the shaft, the shaft may be provided with a deformation, such as a notch or reduced circumference, at one or more desired locations such that the shaft breaks or shears at the deformation(s), thereby allowing the auxiliary member to function as the sole member which retains the fastened materials.

Abstract: A screw having a screw-threaded shank and a circular head, the head being provided with three radially extending screwdriver tip receiving portions defined between three first, off central integrally formed projections designed to become shaved-off the screw head by a pre-set force applied during tightening of the screw, and three second, integrally formed projections designed to withstand a shear force greater than the pre-set force applied during slackening of the screw.

Abstract: A breakaway coupling for a light pole or the like is disclosed and is utilized on each of the anchor bolts of the foundation for the pole. Each of the couplings comprises a metal coupling nut which has a plurality of radially spaced-apart and vertically disposed slits formed therein which extend thereinto to create weakened areas or zones in the coupling nut. The coupling nut is embedded in a fiber-reinforced material which provides the necessary hoop strength to the coupling nut. The base plate of the pole is positioned on the upper ends of the coupling nuts and is secured thereto by bolts extending downwardly through the base plate of the pole. If the pole is struck by a vehicle, the fiber-reinforced body members, as well as the coupling nuts, fracture to permit the pole to break away from the foundation. The fiber-reinforced body member of the coupling not only adds hoop strength to the coupling nut, but prevents the metal coupling nut from being exposed to corrosive elements such as salt or the like.

Abstract: A fastener, such as a nail, screw, etc., which possesses supplemental support and/or retention capability is provided. The fastener includes an elongated auxiliary member secured interiorly to, exteriorly to, or along the shaft of the fastener. The auxiliary member is secured to the shaft at two or more portions of the shaft. The auxiliary member provides the shaft with additional support strength and/or enables fastened materials to be retained upon breakage or shearing of the shaft as a result of, for example, heavy tensile or shearing loads. To facilitate breakage or shearing of the shaft, the shaft may be provided with a deformation, such as a notch or reduced circumference, at one or more desired locations such that the shaft breaks or shears at the deformation(s), thereby allowing the auxiliary member to function as the sole member which retains the fastened materials.

Abstract: The invention relates to a wear adjustment device for a brake, especially a motor vehicle brake. The device comprises an adjusting shaft, which is mounted in a housing and is accessible from the outside at a front end. Said adjusting shaft is equipped with a head part in the accessible area, this head part enabling the transmission of a torque. The head part is configured as a separate structural part and can be coupled to the adjusting shaft in such a way that it is resistant to torsion in the axial direction of the adjusting shaft and in relation to said adjusting shaft. The head part is also provided with a predetermined breaking point which enables separation to take place when a maximum permissible torque is exceeded. This constructionally simple configuration reliably prevents the adjusting shaft from being overburdened and therefore prevents any damage to the wear adjustment device or essential parts of the break that this could otherwise cause.

Abstract: Shear coupling is provided for connecting a downhole pump with the terminal member of a sucker rod string. The coupling is threadably connected to the sucker rod and the pump during normal operations, but can relatively easily be parted, if the pump becomes stuck, by pulling up on the still free sucker rod string. One end of the coupling has a pin incorporating an externally threaded head and the other end has an internally threaded cavity. A cylindrical, hollow body joining both ends is weakened by the groove, providing a stress concentration point, where the coupling will part, when exposed to predetermined desired load. The weakened part of the shear coupling is protected with a special coating, preventing corrosion and abrasion.

Abstract: A toggle bolt for securing a threaded member relative to a mold wall, including a head portion having a central portion, a rounded end extending from one end of the central portion and at least one wing flexibly extending laterally with respect to a longitudinal axis of the central portion; and a thread protector portion including a threaded member having a slotted head, the thread protector being releaseably connected to the central portion.

Abstract: A tamper-indicating fastener has a cylindrical body with threads extending from one end along a portion of the body, and a tamper indicating having a transducer for converting physical properties of the body into electronic data; electronics for recording the electronic data; and means for communicating the recorded information to a remote location from said fastener. The electronics includes a capacitor that varies as a function of force applied by the fastener, and non-volatile memory for recording instances when the capacitance varies, providing an indication of unauthorized access.

Abstract: The invention relates to a holding device for fixing a car body element to the structure of a motor vehicle. The inventive device is of the type that comprises a panel (10) formed by a sheet (11) which defines a support face that is adapted to co-operate with the car body clement and,which comprises means (14, 15) for locking to the car body clement and frangible means (16) for releasing the car body element. Said device also comprises an element (30) for quarter-turn fixing in an opening in the structure which is used to hold the assembly formed by the panel (10) and the car body element.

Abstract: A sealing assembly designed to co-operate with a screw provided with a tightening slot by being mounted therein in such a manner that once said assembly is sealed the tightening slot is hidden in a manner that is not reversible except by destroying the seal, and further comprising a breakable drive suitable when the sealing assembly is subjected to a tightening action, for driving the screw in a tightening direction inside a receptacle provided for this purpose and for breaking once the screw becomes blocked, so as to prevent any loosening action being applied via the breakable drive.

Abstract: A concrete embedding anchor includes. An anchor including an anchor body having a head at one end of the shank and a stopper at the other end, a fitment concentrically mounted to said head and having an external thread and easy breaking portion formed on the round bar portion thereof, and a hemispherical shell-shaped former fitted with the middle portion of said anchor shank. A retainer is secured to the concrete form in advance, said anchor fitment is inserted into and screwed up to said retainer, said anchor is combined with the concrete form, then concrete is poured, and said concrete form is taken away after the concrete has hardened.

Abstract: A nut construction (10) is described comprising an outer tightening part (20) and an inner part (30), where the inner tightening part comprises an outer adapted surface (34), which lies against a corresponding inner opening (26) in the axial direction of the outer tightening part (20). Furthermore, a screw/bolt construction (10a) is also described comprising an outer screw/bolt part (20f) and an inner tightening part (30f), where the inner tightening part comprises an outer adapted surface which lies against a corresponding inner opening in the axial direction of the outer screw/bolt part. The invention is characterised in that the inner and outer surfaces (26, 34), respectively, of the outer tightening part (20-20f) and the inner part (30-30f), are mutually joined as a unit, with the parts (20-20f, 30-30f) being arranged to disengage from each other when the one part is subjected to a torque moment above a given limit, relative to the other part.

Abstract: A tension control bolt includes a shank, the shank including a threaded section and a breakaway section, and a bolt head, the bolt head constructed with a wrenching section and a flange section intermediate the wrenching section and the shank, the flange section having a generally circular bearing section, the diameter of the bearing section exceeding the distance between opposed flat wrenching surfaces of the wrenching section.

Abstract: There is provided a torque specifying nut which is suitable for being applied to a wind-fastening strap metal piece, capable of clamping only up to a specified clamping torque and capable of confirming whether clamping has been finished or not at a glance.

Abstract: A tissue fastener comprises a shaft having a member disposed thereon for lodging the shaft within the tissue, the shaft having a region that is relatively flexible to render a tissue engaging head disposed at a proximal end of the shaft movable with respect to the shaft. In one embodiment, the region comprises substantially an entire length of the shaft and is made from flexible material, such as a mesh, onto which the member and the head are molded. In another embodiment, the shaft comprises generally rigid material, and the region comprises a flexible joint between the shaft and the head. The flexible joint comprises a breakable (e.g., frangible) section of the shaft, and a flexible member (e.g., a plurality of filaments or a flexible tube) extends between the shaft and the head past the breakable section.

Abstract: An internally threaded (23) collet nut (22) is placed onto the first cable (12) and a first cable (12) is inserted into a collapsible collet (20) on a connector body (18). The collet nut (22) and a breakaway nut (30) are engaged with simple wrenches to establish a reactive torque between the collet nut (22) and the breakaway nut (34) to break away the breakaway nut (34) from the connector body. An enlarged end (16) of the second cable (14) is placed into the interior of a retainer nut (30), which is threaded onto the threaded section (19) of the connector body (18) to abut the collet nut (22), thereby connecting the two cables (12 and 14).

Abstract: The invention is a wiper arm (20) for securement to a drive shaft (10,12). The wiper arm (20) has a securing part (18), which on one end has a bearing point (16) by way of which the wiper arm can be connected, in a manner fixed against relative rotation, to the drive shaft (10, 12) via a nut (14). The nut can be screwed onto the drive shaft (10,12). The nut is formed by a component integrally cast onto the securing part (18) and is connected to the securing part (18) via a binding (26) that can be released upon installation of the wiper arm (20).

Abstract: A double pitch screw having a head at one and a drive point at the other end thereof, with a clear unthreaded shank between a set of low pitch threads adjacent to the drive point and a set of high pitch threads adjacent to the head and the break point.

Abstract: A robust rigid block forming a fastener and tamper evident seal attaches a cover to a tote bin. The seal is formed partially into a C-shaped locking device for insertion into aligned bores in the tote bin cover and bin. The C-shaped device is inserted to an insertion position and then displaced to a locking position with the legs of the device overlying the cover and bin members at the bores fastening the cover to the bin and capable of withstanding high shock loads. A locking element connected to the device by a frangible web has a camming surface that engages an edge of the cover for camming the device during insertion of the element in the bores to the insertion position at which time the web is fractured. The element has a flange plate attached to the element body by a weak web for selective removal of the plate. A resilient tang is attached to the element for engaging a mating locking recess in the body for locking the element to the device and to the bin and cover in the insertion position.

Abstract: A bearing support for a rotor of an aircraft turbine engine includes a frangible linkage designed to enable the engine to safely shut down despite the introduction of an excessive unbalance to the fan stage.

Abstract: A coupling assembly for use in connecting fluid lines having a unitary female body and a male coupling portion. The female body includes at least two passageways having frangible diaphragms. The male coupling portion includes at least two male coupling halves having frangible diaphragms. Cutting devices are positioned in the passageways of the female body. As the male coupling portion is moved toward the female body by a bracket and fastening device, the diaphragms are ruptured to allow fluid flow between the lines.

Abstract: A pipe fitting comprises a fitting body with a longitudinal axis, having a pipe connection member for the sealed connection of a pipe and a thread for threadedly joining the fitting body to a connection unit, and a member on the fitting body to be driven by a tool, to which a tool for turning the fitting body about its longitudinal axis may be applied for threadedly joining the same to the connection unit. This fitting is provided with means between the tool engaging portion and the fitting body that limit the torque acting on the fitting body when the tool engaging portion is turned.

Abstract: A tamper-proof seat screw (30), such as an idle set screw for a throttle lever of a throttle body, comprises a tool-engageable head (31) at one end, a foot (34) at an opposite end, and a threaded shaft (32) between the head and the foot with the threaded shaft having an adhesive coating (36) thereon that forms an adhesive joint between the threaded shaft and a threaded throttle body bore (10a). An anti-tampering slip collar (42) is provided on an anti-tampering break-away shaft (40) between the threaded shaft and the foot to hinder post-factory tampering of the screw.

Abstract: A device for securing a pinch roller support arm to a chassis of a magnetic tape apparatus. In the device, the chassis includes a round hole which is formed such that it extends through the chassis, and a securing part is outsert molded in the chassis in such a manner that the securing part extends through the round hole. After the pinch roller support arm is fitted with a support shaft provided on and projected from the chassis and a projection provided on the pinch roller support arm is fitted into a fitting hole formed in the chassis, by rotating the securing part around the round hole, the securing part is engaged with the projection.

Abstract: A biocompatible fastener that may be used for attachment of a fixation plate to bone is described herein, where the fastener has features that facilitate its deployment in a surgical environment. The fastener is composed of a screw, having a threaded shaft and slotted head, and a detachable body that is used for deploying the screw and is then broken away and discarded. The slot in the head of the screw has stress concentrating notch features that direct the fracture lines into the screw head upon detachment of the secondary body, thus ensuring that the screw head surface remains smooth after deployment. A suitable driver for applying the fastener is also described.

Abstract: A fastener, method of fastening, a fastener and drive tool system, and a drive tool for driving a fastener in which the fastener has a leading portion or drill tip portion which is frangible and detachable from the threaded portion. The fastener includes a shank having a head formed at one end, the leading portion or drill tip at an opposite end thereof, and the threaded portion positioned intermediate the head and drill portion. A weakened or frangible portion is provided on the shank between the drill tip and the threaded portion for dividing the fastener into the threaded portion which is retained in engagement with the workpieces and the drill tip which is detached from the fastener. The method includes driving the fastener into a workpiece and detaching or fracturing the drill tip from the threaded portion generally at a predetermined location.

Abstract: An electroconductive composite material composed of a three-dimensional continuum of a porous metal with the pores filled with graphite and a resin, having a good heat resistance, wear resistance, strength and thermal conductivity, having a light weight, and particularly useful as electric armature brushes and other electric sliding elements.A process of producing the composite material comprises the steps of: filling pores of a three-dimensional continuum of a porous metal with a pasty mixture composed of graphite, a binder, and a solvent; treating the continuum for volatilization of the solvent; and then, forming and heating the continuum.

Abstract: A repair method which is used to restore planarity to concave damage in a wall of gypsum board construction, wherein the device is inserted through a small hole drilled in the damaged area, or inserted from the rear through a hole drilled in the back wall. Features of the device engage the opposing interior surfaces of the two wall boards. Tears and cracks in the wall are cemented. The device is manually powered in the manner of a jack to push out the damaged board pieces, which are still hingedly attached by the cardboard facing. Thus united, the cracks are bonded while the inexpensive device is left in the wall, acting as a permanent prop. Remnants of the device remaining outside of the wall are broken off and the hole is filled.

Abstract: To secure containers on the floor of the cargo area of an aircraft, latches are known that comprise a frame and at least one latch hook, which is mounted on the frame so that it can pivot about an axle from a retracted resting position into an upright operating position. If due to inattentiveness of the service personnel the latch hook is left in its operating position and a container strikes against it while it is in this position, the result is often destruction of the floor structure. It is proposed to provide a safety device that allows the latch to be deflected out of the way when it is subjected to a predetermined overload in a direction parallel to the floor of the cargo area.

Abstract: A sealing fastener includes a unique identifier device for the individual fastener that enables ultrasonic identification of the device using an ultrasonic fault measuring system, and a frangible element within the fastener integrated with the identifier device that provides an ultrasonic signature indicating an attempt to loosen or remove the fastener when subjected to an ultrasonic signal generated by an ultrasonic fault measuring system. The unique identifier device includes a stack of individual metallic washer elements brazed together, with each washer element including discontinuities or cavities that are randomly arranged with respect to the cavities of the other washers in the stack. The fastener includes relatively movable portions that cause fracture of the frangible element upon any attempt to loosen or remove a fastener after it has been tightened or secured at its sealing location.

Abstract: A fastener, method of fastening, a fastener and drive tool system, and a drive tool for driving a fastener in which the fastener has a leading portion or drill tip portion which is frangible and detachable from the threaded portion. The fastener includes a shank having a head formed at one end, the leading portion or drill tip at an opposite end thereof, and the threaded portion positioned intermediate the head and drill portion. A weakened or frangible portion is provided on the shank between the drill tip and the threaded portion for dividing the fastener into the threaded portion which is retained in engagement with the workpieces and the drill tip which is detached from the fastener. The method includes driving the fastener into a workpiece and detaching or fracturing the drill tip from the threaded portion generally at a predetermined location.

Abstract: An interior trim panel for a motor vehicle has an opening for deployment of an air bag and a discrete air bag door that is attached to the interior trim panel covering the opening. The door includes a relatively rigid retainer that hinges the door to the trim panel so that it opens responsive to deployment of the air bag. An unhinged end of the door is held down by two tether tear straps that break away when the air bag is deployed.

Abstract: A method and apparatus for repairing a casting in a cold metal repair process includes a plurality of drilling fixtures which facilitate the creation of one or more lock receiving recesses positioned generally transverse to the casting crack. The lock receiving recesses are formed of a single sized circular bore combination having alternating double and single circular portions to maximize strength. A plurality of correspondingly configured metal locks are inserted into the lock receiving recesses to provide transverse metal locks drawing the casting portions on each side of the crack together. A plurality of threaded bores are formed along the remainder of the casting crack in overlapping spacing which receive a corresponding plurality of stitching pins. The stitching pins each define threaded shaft portions having pointed ends and undersized major pitch diameter threads adjacent the pointed ends.

Abstract: A door assembly (10) for an inflatable vehicle occupant restraint module (14) includes two doors (80, 100) which are pivotally mounted for movement between a closed position and an open position. The doors (80, 100) cover an opening (28) through which an inflatable air bag (22) deploys. Each door (80, 100) has at least one finger portion (120, 140, 152, 154) which overlaps the other door when the doors are in the closed position. The overlapping finger portions (120, 140, 152, 154) prevent inward pivoting movement of the doors (80, 100). A retainer assembly (200) holds the doors (80, 100) in the closed position and releases the doors to pivot outward upon inflation of the air bag (22). The retainer assembly (200) includes a frangible member (224) which ruptures.

Abstract: Squeaks in a floor or stair are eliminated by driving screws in the area. At least one scored screw to be driven into the squeak area combines with a specialized driving bit and a alignment and depth control fixture to eliminate the squeak. The alignment and depth control fixture can be used to direct the scored screw to the proper point while the driving bit can stop driving the screw at the desired position. After the alignment and depth control fixture is removed, the screw is broken at the prescored position. To minimize damage to an in place carpet, a tape is wrapped around the threads of the screw.

Abstract: Disclosed is a tilt type steering system having: a steering column having its one end part into which a handle shaft fixed with a steering wheel is rotatably inserted; a pivotal supporting unit for pivotally supported the other end part of the steering column; an adjusting unit for adjusably locating and releasably fixing the steering wheel in an arbitrary position with respect to the car body within the range of pivotal movement of the steering column; a tilt lever for controlling the fixation and the release of the steering column with respect to the car body by the adjusting unit; and a shearing bolt having a head part sheared off when undergoing predetermined or greater torque in order to fix the tilt lever to the adjusting unit.

Abstract: A fastener and method for fastening panels is disclosed. The fastener comprises a bolt and a nut with a locking feature to prevent loosening of the fastener from vibration after it has been set. The locking feature comprises a frustoconical tip on the inserted end of the bolt that engages a retainer ring in the nut. When setting the fastener, the retainer ring deforms around the outer end of the tip and slides down the narrowing frustoconical surface of the tip until the fastener is fully set. Unthreading of the bolt from the nut is prevented since the retainer ring will resist deformation along the increasingly larger diameter portions of the frustoconical tip. In another aspect of the invention, the nut is provided with shear tabs which engage a wrenching tool. These tabs are designed to shear when the fastener is fully set to prevent further application of torque by the tool.

Abstract: An internal wrench has a body having an internal hole of a polygon shape and an outer surface of a polygon shape which conforms to the internal wrenching surface of the part to be wrenched. The wrench body is provided with a shoulder for locating the wrench in a proper drive engagment position.

Abstract: An electrical wire connector has a bifurcated bolt having opposed prongs coextending spaced from each other defining a wire-receiving channel therebetween. A nut is threaded onto the bolt until an insert carried by the nut is pressed tightly against one of the two wires disposed along the channel, to clamp the wires tightly against the bottom of the channel and electrically interconnect the wires. The nut has an internally threaded lower section within which a body section of the insert is disposed, and an upper section joined to the lower section at a frangible section adapted to break upon sufficient torque being applied to the nut by a tool, thus providing a torque limit and a visual indication of full assured interconnection.

Abstract: Novel preset, calibrated stud bolts and spring-loaded nut assemblies with torque-off spline tips for securing structural conduit units and the like, and method of calibrating the same.