Abstract: A fastener structure for particular use in clamping a panel assembly includes a bolt or pin member having a generally elongate shank for extension through a panel, and a locking-recess in the shank for reception of a locking formation. The pin shank is insertable through a sleeve having a bore which terminates at an anvil portion surrounding the inserted pin shank. A lock collar is insertable into the sleeve bore radially between the shank locking-recess and the sleeve into abutment against the anvil portion of the sleeve. Compression of the locking collar against the abutting anvil portion of the sleeve produces cold flow deformation of a portion of the collar into the locking-recess of the shank to form a locked joint so that the collar then blocks any subsequent relative movement between the pin shank and sleeve to secure the fastener structure.

Abstract: A vibration resistant fastener comprising a pin and a collar. The pin is threaded or peripherally grooved. At a central location, the major diameter of the thread or groove is reduced to a diameter which is still larger than its minor diameter. A collar is threaded or swaged on to the pin and collar material is pressed into an open region that was formed by the reduction of the major diameter, to form a thread lock.

Abstract: A locking system including a combination of a multi-strand locking wire and a ferrule having a thin walled crimpable section useful for preventing threaded fasteners from loosening due to vibration, each of the fasteners having an aperture for receiving the locking wire. The ferrule has a larger stop end for interfering with the fastener aperture and a smaller thin walled barrel end for crimping. In one configuration the ferrule is a thin walled cylinder with one end flared out to form the stop end for facilitating insertion of the locking wire. The thin wall of the barrel end allows reduced crimping force. Further reduction of crimping force is achieved by crimping the ferrule to deform only small localized areas on the barrel end. The ferrule may bear identification marks which may be either pre-marked or applied during the installation such as by crimping.

Abstract: A breakable bolt assembly comprising a pin member, a collet member and a thumb knob member. The assembly is designed to mount without the use of hand or power tools, and features a pin member which breaks apart when the shear force on it exceeds a predetermined magnitude. The pin member comprises an elongated pin body and a pin head. A proximal length portion of the pin body has a plurality of flutes transverse to the length of the pin body and spaced from each other by ribs. The diameter of the pin body at the flute most proximate the pin head is smaller than at the more distal flutes. Thus, shear force is transferred to the most proximal flute, and when the force exceeds a predetermined magnitude, the pin member breaks apart at the juncture of the pin body and pin head. The collet member has an internal passage for receiving the distal end of the pin member, and is compressible around the pin member.

Abstract: A locking system including a combination of a multistrand locking wire and a ferrule bearing an identification mark for preventing threaded fasteners on a device from loosening due to vibration, each of the fasteners having an aperture for receiving the locking wire. The ferrule with an identification mark serves as a seal for identification and for preventing tampering with the device. The identification mark can be either premarked on the ferrule before system installation, or be applied to the ferrule during system installation, such as by shaping the crimped deformation on the ferrule into an identification pattern.

Abstract: An interference fit fastener and threaded puller attachment in combination. The fastener has a shank with an external thread and an axial recess with an internal thread, the threads being of opposite hands. The puller attachment is threadly engaged to the internal thread so as to exert an axial pull on the fastener, and to resist torque exerted on a nut or collar being applied to the external thread. After the fastener is set, the puller is removed.

Abstract: A captive nut comprises an internally threaded nut body having torque receiving wrench pads and an annular truncated conical surface terminating in a radially extending load transfer surface. The nut body is accepted in a complementary cup-shaped washer having a conical cylindrical wall portion complementary to the conical wall portion of the nut body so as to retain the nut body. An initially truncated conical retention element is disposed between the load transfer surface of the nut body and a radial portion of the cup-shaped washer. Torquing of the nut body toward a workpiece effects deformation of the retention element nut into a complementary annular recess in the bolt thereby permanently capturing the nut on the bolt.

Abstract: A lock fastener includes a tubular collar having a plurality of protuberances extending radially inwardly from an inner surface thereof and adapted for cooperating with a bolt to retain the collar thereon. A lock ring surrounds an outer surface of the collar and has an initial inner diameter. The lock ring is formed of shape memory metal alloy effective for shrinking the lock ring to a final inner diameter less than the initial inner diameter upon change in temperature thereof to in turn shrink the collar for clamping the protuberances in locking contact with the bolt.

Abstract: Composite fasteners joining panels together are installed by a tool that grips the end of a fastener stem and exerts a pulling force which causes a rotating forming die to advance toward the fastener. The rotating die is pressed against the fastener to frictionally heat and deform a tail of the fastener to create an upset head. A sensing device stops the movement of the forming die and controls the size of the upset head. A portion of the stem extending from the fastener is then pulled away by a pulling force on the stem. Preferred dimensional relationships of said upset head are disclosed, together with various fastener constructions.

Abstract: A blind pin fixing is provided comprising a headed pin having a series of radial grooves in that part of its stem beneath the head and a flanged body with a first circular flange and a deformable body portion projecting therefrom and arranged for the reception of the head of said headed pin so that in operation the deformable body portion is inserted through a hole in a workpiece and the fastener set by drawing the pin from the side of the flange remote from the deformable body portion so that the deformable body portion is collapsed round the hole and the collar and metal flow into the grooves locks the pin to the flanged body, the deformable body portion being of square section and formed with axial slots extending fully to the end remote from the flange so that it is divided into a plurality of, preferably four, legs which facilitate collapsing when the fastener is set.

Abstract: A tolerance river for highly stressed riveted joints possessing a shank (3) whose length is harmonized with the two components to be joined, followed by a retaining piece (5) interacting with a retaining collar and provided with grooves (9) on its circumference. An enveloping jacket (12) which links the root diameters d1, d2 of the grooves, widenes conically from the head of the tolerance rivet toward its opposite free end. The grooves (9) on the retaining piece (5) have decreasing groove width a1, a2, etc., and increasing asymmetry of the groove profile. The first groove (9) located at the retaining piece (5) of the tolerance rivet that is located after the shank (3) in the direction toward its free end, possesses rounded shaping r3 in the area of its root diameter d1 whose area (13) is strain-hardened.

Abstract: An improved lockbolt fastener system wherein the pin has a threaded section with at least one axial slot to provide an anti-rotation lock. The wall of the collar has a plurality of axially extending grooves extending radially outwardly from the collar internal diameter.

Abstract: A nut assembly to be mechanically locked to a threaded bolt or pin of the type having an annular groove. The nut assembly comprises a threaded nut element to engage the bolt and a washer connected to the nut element. The washer has first and second coaxially aligned cylindrical walls extending therefrom. The first wall of the washer is deflected into contact with the nut element to prevent the disconnection of the nut element from the washer during handling prior to installation. In the as-packaged configuration of the nut assembly, the nut element is seated upon the second wall of and spaced from the washer. During installation, the nut element is drawn towards the washer to deflect the second wall radially into the annular groove of the bolt to mechanically lock the washer to the bolt and thereby prevent the inadvertent withdrawal of the bolt from the nut assembly due to vibration and similar mechanical forces.

Abstract: A high strength, high clamp blind bolt for fastening structural workpieces, which blind bolt has a core pin with a blind side head and a plurality of locking grooves or threads, a high stand-off collar adapted to be swaged into the locking grooves or a nut adapted to be threaded onto the pin threads, a compression frangible main sleeve structure and an expandable, short fixed length blind side sleeve structure; the blind bolt is set by a relative axial force applied to the pin which forces the short blind sleeve structure against the main sleeve structure causing the blind side sleeve to expand and form a blind side structural load bearing blind head; the relative axial force can be applied by pulling in a swage configuration or by torque in a threaded configuration; the core pin head acts on the main sleeve structure to cause a frangible portion to shear and reduce the main sleeve structure length after which the blind head engages the blind side of the workpieces; the high stand-off collar is then swaged in

Abstract: A method of making a threaded insert assembly for sheet material wherein a threaded insert that is a single unitary element is installed in a closely fitting hole in the sheet material with its threads occupying the hole. The sheet material around the hole on the exit side of the material is then upset into the threads of the insert in order to hold it by its threads so that it is adjustable by rotation. An unthreaded tip effectively prevents removal of the insert by back-screwing.

Abstract: A high strength blind bolt for fastening structural workpieces the blind bolt being of a swage type, pull type construction and having a pin member with a plurality of locking grooves, a main sleeve, an expandable sleeve and a collar adapted to be swaged into the lock grooves, the main sleeve having a tapered nose portion adapted to radially expand the expandable sleeve in response to the application of a preselected relative axial force applied between the pin member and the collar, the tapered nose portion being defined by a preselected small angle to limit the radial expansion of the expandable sleeve to provide a high strength blind head for engaging the adjacent, blind side of the structural workpieces and to initially clamp the structural workpieces together at a high clamp load and to provide a final high, residual clamp load upon swaging of the collar into the lock grooves of the pin member.

Abstract: A swage type fastener including a swageable collar member having a pintail member secured thereto to define a pintailed collar; the pintailed collar is operable to be secured to a stud or pin member by an installation tool which applies a relative axial force between the pintail member and collar member to cause a swage anvil to swage the collar member into a locking groove portion on the pintail member and then to sever the pintailed member from the installed collar member; the stud or pin member can have a gripping groove construction at its free end to grip the collar member at initial swage and relatively low swage loads and to resist the installation tool pulling the collar member into the swage anvil instead of swaging it onto the stud or pin member under the subsequently high swage loads.

Abstract: A fastening system including a swage type fastener including a pin and a collar adapted to be swaged into helical lock grooves in the pin and with the collar having a female thread which is threadably engageable with the helical lock grooves to selectively clamp or locate the workpieces relative to each other more or less prior to swage, with the collar thread being of a strength to deform or shear relative to the pin threads in response to a relative axial load between the pin and collar at the initiation of the swage operation but prior to swaging and in which the fastener includes a resistance member for permitting pre-clamping of the workpieces together at a selected pre-assembly pre-load while subsequently permitting sufficient relative axial movement between the pin and collar after pre-clamping such that the collar threads can be deformed or sheared prior to initiation of swage whereby the final clamp-up load of the workpieces is substantially uninhibited by the initial threaded engagement of the pin a

Abstract: Fasteners, such as bolts, are normally utilized to provide an arrangement to secure two members together. When working forces are applied to the assembled members trying to tear them apart, the size of the bolts and the ability to apply the proper torque to the bolts on the job site become limitations. In the subject arrangement, a fastener assembly is provided having a hollow cylindrical pin with an enlarged portion at one end and a plurality of ridges and grooves at the other end. A hollow cylindrical shear ring, having a chevron shaped cross-section taken along its longitudinal axis, is placed, during assembly, in intimate contact with the plurality of ridges and grooves. A hollow cylindrical compression ring is placed, during assembly, in contact with the hollow cylindrical shear ring.

Abstract: A mounting assembly for fixing a panel to a space frame defining the general shape of an automotive vehicle that provides accurate, adjustable positioning of the panel with respect to the space frame and accommodates differential growth and shrinkage of the frame and the panel induced by temperature changes. The assembly includes a multi-piece fastener held axially and radially fast with respect to the space frame and axially and radially free with respect to the panel.

Abstract: A fastener for use in fatigue resistant structures such as aircraft wings. The fastener is installed into interference fit by tool engagement in a tapped hole coaxial with the threaded end of the pin, at the threaded end of the fastener pin. The tapped hole is engaged by a hardened mandrel which is detachably threaded into the threaded hole in the pin. The mandrel has an extending tail end which may be gripped by a pulling tool after the threaded end of the pin is partially inserted into the workpiece with the mandrel extending through the workpiece. The tail end of the mandrel is engaged by a pulling tool that can be manually or power actuated to pull the interference fit shank into the structure workpiece to produce a fatigue resistant interference between the pin shank diameter and the workpiece hole diameter.

Abstract: A fastening system including a two piece swage top fastener including a pin and a collar in which the pin has shallow lock grooves having a ratio of (h/Du).times.10.sup.2 of four (4) or less and in which the lock grooves have a simulated streamlined root contour generally defined by a portion of an ellipse, with the collar having a wall thickness defining a volume of material sufficient to provide overpacking of the shallow grooves of around 16% and to provide a clamp load of between around 85% to around 95% of the yield point of the pin, and with the pin and collar materials having ultimate shear strengths in a ratio of around 1.8:1 to 2.4:1 and with the width of the shallow pin grooves and intervening shoulders being generally in accordance with the shear strength ratio between the pin and collar.

Abstract: A fastener comprised of longitudinally divided bolt pieces (1,2,3) inserted into the hole, with trailing tips of the bolt pieces connected to a string (5), which is pulled out of a hole into which the bolt pieces are inserted so that the divided bolt pieces are recoupled, with head portions of the divided bolt pieces halted at the other side of the hole. The forwardly exposed shank of the recoupled bolt is fastened by means of a nut or by applying a riveting.

Abstract: A swage type fastener including a pin and a collar adapted to be swaged onto the pin by the application of a relative axial force by an installaiton tool, with the pin having a lockgroove portion, a tubular collar having an inner and outer end and adapted to be located on the pin and having a collar shank portion adapted to be swaged into the lock groove portion by the relative axial force applied between the pin and the outer end of the collar by the installation tool, the collar having a through bore which has a reduced diameter bore portion whereby the collar is generally piloted on the pin, and the collar shank portion being generally frusto conically shaped from the reduced diameter bore portion to an enlarged bore portion at the outer end, the collar shank portion having a generally uniform wall thickness from the outer end for a distance over its swageable length whereby the frusto conical shape of the collar shank portion provides a high hold-off to resist initiation of swage of the outer end of the c

Abstract: A nut having an enlarged head, one end disposed in a countersunk opening in one side of the panel, which head may be configured for anti-rotation, and either an integral threaded portion or internal floating threaded insert at the other end extending through the panel. A sleeve is locked to the body of the nut retaining the same to the underside of the panel and allowing for variation in panel thickness. The nut threadably engages a threaded member that may be mounted in a panel.

Abstract: A self-retaining collar for a pin of a two-piece fastener has a projection or detent from its inner surface for engaging locking grooves of the pin. The pin has a head and a shank, the locking grooves being formed on the shank. The fastener holds two or more workpieces together in tension by inserting the pin through the workpieces until the head contacts one side of the workpieces and the locking grooves extend through the other side. The shank has pulling grooves located on the side opposite the head. Once the pin is through the workpieces, the collar is slid over the shank until the detent engages the lands of one of the locking grooves. The collar will thus stay in place around the locking grooves even when the force of gravity tends to pull the collar off of the grooves. The collar is then swaged into the locking grooves while the workpieces are placed in tension by pulling on the pulling grooves of the pin.

Abstract: A fastener, intended for fastening a sandwich panel (b) to a support (a), and including a headed bolt (1) having a break off tail portion, and a flanged tubular body (4) into which the main portion of the shank (3) of the bolt is pulled so as to lockingly interengage the body and set the fastener, includes a deformable tubular spacer (10) disposed on the shank (3) of the bolt (1) between the body (4) and the head (2) of the bolt (1). The spacer (10) is in the form of a sleeve having a tubular central core, and peripheral grooves (12) between which are annular fins (11). The spacer is capable of being deformed to a substantially shorter axial length by axial compression under substantially constant predetermined load.

Abstract: A double locked threaded fastening assembly includes a nut and a bolt. The bolt has a head at one end and threads adjacent its other end with a plurality of axially extending grooves located adjacent to the threads intermediate the threads and the bolt head. The nut has a work piece engagement end and a hollow bore extending through that end into the nut. A first portion of the bore proximal to the work piece engagement end is free of threads and a second portion distal from the work piece engagement end includes internal threads. The internal threads of the nut are capable of threading onto the external threads of the bolt to clamp a work piece under a clamping load between the head of the bolt and the nut.

Abstract: A fastening assembly includes a bolt and a malleable fastener. The bolt has a head at one end and either threads or circumferentially extending grooves adjacent the other end. The bolt further includes a plurality of axially extending grooves located on the bolt between the bolt head and the threads or circumferentially extending grooves. The malleable fastener is capable of being swaged from an initial state to a swaged state. In the initial state the fastener is essentially shaped as a hollow collar having an outside surface and an interior surface with the collar sized and shaped to freely slide over the bolt. In the swaged state the interior surface of the collar intimately contacts and irreversibly locks against both axial and rotational movement with respect to the bolt by assuming a complementary shape to the bolt about both the axial grooves and the threads or the circumferentially extending grooves.

Abstract: The fastening together of structural elements formed from carbon-carbon is accomplished by a fastener constructed from 2-D or 3-D carbon-carbon in the form of a high angle helical threads on one end and a countersunk head with a carbon-carbon central insert on the other end with the threaded end inserted through the carbon-carbon structural elements to be joined. A metal is painted on the threads and the shank on the fastener. A collar formed from carbon-carbon is fitted over the course threaded end of the fastener with the distal end of the threads extending therefrom. While passing a heating current through the fastener, the head and the collar of the fastener are forced together. The fastener is heated to an elevated temperature in the presence of an Oxygen gas cover which causes the powered metal to expand up to 100% binding the fastener to the carbon-carbon components, collar and insert.

Abstract: Predetermined limits are attained for the peak loads encountered when a composite assembly of workpieces is secured with a swaged collar fastener, by disposing cavities in the cylindrical wall of the fastener collar to receive material flow during the swaging operation. Rotation between the collar and pin of the fastener is precluded by disposing abutting portions on the pin, which interface against the swaged material of the collar. Fastener cost reductions are achieved by decreasing the volume of a post-swage scrap portion on the pin and by concurrently fabricating grooves thereon with a rolling die, for various functional purposes. Swaging tool malfunction is avoided by eliminating land surfaces adjacent to grooves on the pin through which pull is applied thereto with the tool.

Abstract: A swage type fastener including a pin and a collar adapted to be swaged onto the pin by the application of a relative axial force by an installation tool, with the pin having a lockgroove portion, a tubular collar having an inner and outer end and adapted to be located on the pin and having a collar shank portion adapted to be swaged into the lock groove portion by the relative axial force applied between the pin and the outer end of the collar by the installation tool, the collar having a through bore which has a reduced diameter bore portion whereby the collar is generally piloted on the pin, and the collar shank portion being generally frusto conically shaped from the reduced diameter bore portion to an enlarged bore portion at the outer end, the collar shank portion having a generally uniform wall thickness from the outer end for a distance over its swageable length whereby the frusto conical shape of the collar shank portion provides a high hold-off to resist initiation of swage of the outer end of the c

Abstract: A fastening system including a two piece swage type fastener including a pin and a collar adapted to be swaged into lock grooves in the pin and in which the lock grooves are helical and with the collar having a limited female thread which is threadably engageable with the helical lock grooves for variably clamping work pieces to be secured prior to swage, with the collar thread being deformable in response to a relative axial load between the pin and collar at the initiation of the swage operation but prior to swaging and in which the lock grooves are shallow and have a ratio of (h/Du).times.10.sup.2 of four (4) or less and in which the lock grooves have a simulated streamlined root contour, with the collar having a wall thickness defining a volume of material sufficient to provide overpacking of the shallow grooves of around 16%, and with the pin and collar materials having ultimate shear strengths in a ratio of around 1.8:1 to 2.

Abstract: The rivet comprises a tubular rivet body of deformable material, and an elongate stem extending through the bore of the body. The body comprises a cylindrical shank and an enlarged rivet head at one end of the shank. The rivet head may be integral with, or separate from, the shank. The stem includes a plug, and a stem-tail connected to the plug by a frangible breakneck. The plug has a terminal head for abutting the shank, whereby the shank can be axially compressed on pulling the stem-tail and thereby deformed to form a blind head, and a locking groove circumferentially of the plug for receiving material of the rivet head which, during installation of the rivet, will be swaged radially inwardly into the locking groove to lock the plug in the body. The locking groove is of helical form, as with a screw thread, and enables the plug to be removed from the body by rotation, thus facilitating disassembly of the installed rivet and its removal from a workpiece.

Abstract: The present invention relates to a device for joining together building units, comprising a lock housing (2) positioned in one building unit; a peg (3) provided in the other building unit so as to be inserted in the lock housing and the end of which is provided with a flange (8); and a means for locking the peg (3) in the lock housing in the longitudinal direction thereof. In order that the peg could not move in the sideward direction thereof with respect to the lock housing, prior devices comprise a second flange attached to the peg adjacent to an inlet (9) of the lock housing. This second flange can be omitted, if the inner surface of the lock housing (2) is cup-shaped and the diameter thereof corresponds to the diameter of the flange (8) of the peg.

Abstract: The present invention relates to a device for joining together building units, comprising a lock housing (2) positioned in one building unit; a peg (3) projecting from the other building unit; and a locking means (7) by means of which the peg is locked in the lock housing and which comprises two branches (10, 11). After having passed the peg, the branches are turned towards each other by means of a guide surface (12) provided in the lock housing (2). In prior devices the locking means (7) has to be very strong because the contact surface between it and the flange of the peg is small. A large contact surface can be provided between the locking means and the flange of the peg by forming the guide surface into a continuous arched surface (12) which bends the branches sharply towards each other.

Abstract: The invention is a composite rivet comprising a tubular preform having a longitudinal axis and an aperture therethrough aligned with the longitudinal axis. The preform further comprises a head portion, a head forming portion and a shear portion therebetween. The preform is composed of filamentary material in a resin matrix with the filamentary material in the head forming portion in a helical pattern about the longitudinal axis. A mandrel is mounted in the aperture with the mandrel having an end extending outward from said head forming portion.

Abstract: An attachment and method for axially securing a component on the surface of a shaft or bore by forming an annular groove adjacent the component and inserting a closed retaining ring within the annular groove. The retaining ring has a larger internal diameter than the diameter of the shaft or a smaller external diameter than the diameter of the bore. The retaining ring is pressed into the annular groove and plastically deformed by a tool that contacts the ring at angularly spaced portions of the retaining ring surface until the ring fills the groove without axial clearance or play. The annular groove formed on the shaft or bore has a cross section for receiving a standard commercial retaining ring or circlip. The portions of the retaining ring located between the portions that are deformed by the tool form convex portions that extend radially away from the annular groove and define a space for the insertion of a prying tool.

Abstract: A fastening system including a two piece swage type fastener including a pin and a collar adapted to be swagged into circumferentially extending lock grooves in the pin and with the collar having a radially inwardly extending flexible tab located at one end and being engageable with the lock grooves for pre-assembling the work pieces to be secured prior to swage.

Abstract: A male threaded fastener has a plurality of impressions on the nonload-bearing flank of the thread that receives material swaged from a collar to lock the collar and pin together and increase the breakaway torque of the collar. The impressions have a depth of about 0.1 to about 0.3 of the depth of the thread from root to crest. The thread is free of impressions at least 1.5 pitch lengths from its ends.

Abstract: A swagable collar has longitudinally extending internal ribs in its bore that when the collar is swaged over a threaded pin dam a potential leak path between the thread flanks and along the root of the thread and increase the lock between the collar and the pin. The ribs extend at least two thread pitch lengths.

Abstract: A self-locking screw-nut assembly is provided characterized in that the screw (2) has one or more median threads (4) of reduced diameter, whereas the nut (1) is designed to be deformed locally by an external action at the level of these reduced diameter threads after tightening to the desired torque, so that the displaced metal fills the gap (7) left free between the inner thread of the nut (1) and said reduced diameter threads (4) of the screw (2).

Abstract: A headed steel pin for a multi-grip fastener of the pin and swageable collar type has a homogeneous microstructure, and consists substantially entirely of sorbitic tempered martensite. Suitable coarse-grained medium carbon steel is shaped to form a headed pin having a plurality of identical, regularly spaced, annular, combination grooves each able to function alternatively as a locking groove, a pulling groove, or a breaker groove. The shaped pin is heat treated, the steel rendered homogeneously martensitic and then tempered at a temperature approaching as closely as practicable to the lower critical temperature of the steel, to convert the martensitic steel entirely to sorbite. The finished pin has a suitable balance of brittleness, toughness, ductility and impact strength, and tends to break cleanly and reliably at a selected one of the combination grooves when the fastener is installed in a workpiece.

Abstract: A composite rivet comprises a preformed head portion, a shear portion, an integral mandrel extending from said shear portion having an annular recess therein, a deformable plastic locking ring radially aligned with and filling the recess in said mandrel, and a collar telescoped about and radially aligned with said locking ring for controlling deformation thereof.

Abstract: A composite rivet comprises a preformed head portion, a shear portion, an integral mandrel extending from said shear portion having an annular recess therein, a deformable plastic locking ring radially aligned with and filling the recess in said mandrel, and a collar telescoped about and radially aligned with said locking ring for controlling deformation thereof.

Abstract: A composite rivet comprising an axially compressible and radially expandable tubular plastic preform with a mandrel extending centrally thereof and a collar radially aligned with an annular recess in said mandrel for controlling radial deformation of the preform and locking of the mandrel in the rivet.

Abstract: A composite rivet comprises an integral mandrel having a collar telescoped thereabout for controlling radial deformation of a head forming portion thereof.

Abstract: Disclosed is a mechanically lockable fastener assembly for maintaining workpieces assembled, when an elongated bolt with threads formed along a length thereof, and substantially axially aligned rotation resisting surfaces formed along another length thereof, is mechanically assembled with a cooperating nut having a threaded portion and a compressible portion deformable into engagement with said rotation resisting surfaces of said bolt to cause the bolt and the nut of the assembly to be inseparable by untorqued unthreading.

Abstract: An elongated shank has a first section with circumferential grooves arranged for anchoring engagement with a power tool. The shank also has a second section adjacent the first section with circumferential grooves. A collar is arranged to be placed on the second section and also arranged to be swaged into locking engagement therewith by a power tool. A third section at the end of the shank opposite from the first section has screw threads and this section receives a nut in threaded engagement to form a removable and adjustable abutment in association with work pieces and the collar which has been preloaded against the work piece and swaged by a power tool. The shank may be provided with a wrench engaging portion for holding it against rotation when the nut is turned. As an alternative, the collar may be provided with the wrench engaging portion.

Abstract: A pin for a pin and swaged tubular member type of fastener has a shank (14) provided along nearly all of its length with identical combination locking, breakneck and pulling grooves (20). Each groove is provided on at least one sidewall with a discontinuity, and in a preferred embodiment both sidewalls of each groove are provided with discontinuity in the form of a displacement across the width of the groove and along the length of the pin. Alternatively the discontinuity may take the form of a change in inclination of the groove wall, or a combination of both such displacement and change in inclination.