Abstract: A compressor assembly of a gas turbine engine includes a case including at least one opening and a stator assembly supported within the case. A lug assembly is secured to the case and sets a position of the stator assembly relative to the case. The lug assembly includes a lug engaging the stator assembly and a boss extending from the lug through the opening in the case. The boss including a threaded hole receiving a threaded member holding the lug assembly to the case and defines a seat for the threaded member that is spaced apart from an outer surface of the case.

Abstract: A joint comprising first and second rib components, the first rib having an abutment surface and a plurality of lugs disposed adjacent to the abutment surface; and the second rib having an abutment surface and a plurality of lugs disposed adjacent to the abutment surface, wherein the abutment surfaces of the respective ribs are abutting and joined with a tension joint, and wherein the lugs are pinned to form a pinned lug joint by aligning respective holes in the plurality of lugs such that the lugs of the first and second ribs are interleaved and have one or more pins passing through the aligned lug holes. The joint may be used for attaching a wing tip device to the outboard end of an aircraft wing.

Abstract: A connector includes a support (14) made of synthetic resin and constituting a first housing (10), a bolt (20) rotatably penetrating through the support (14), a seal ring (29) mounted between the supporting portion (14) and a head (22) of a bolt (20), a metal nut (36) embedded in the front surface of a second housing (30) and connecting the two housings (10, 30) by being threadably engaged with the bolt (20), and a stopper for preventing a threaded movement of the bolt (20) by bringing the metal parts into contact.

Abstract: a fastened structure comprising: a first member provided with a female screw; a second member provided with an opening; and a male screw fastening the first member and the second member with each other and including a male screw portion, and a head portion having a bearing surface, wherein the male screw portion is threaded in the female screw through the opening of the second member, wherein the second member is provided with a substantially circular folded portion including a curved surface defining the opening and including a free end having an edge pressed against the bearing surface of the male screw.

Abstract: A system for assembling an end cover of a combustor includes a connector and structure for engaging the connector to an insert positioned at least partially inside the end cover. The system also includes structure for moving the connector axially with respect to the end cover. A method for assembling an end cover of a combustor includes inserting a connector through at least a portion of the end cover and an insert positioned at least partially inside the end cover. The method further includes engaging the connector with the insert and moving the connector axially with respect to the end cover to compress the insert against the end cover.

Abstract: The present invention relates generally to Vilas bolt, nut, stud, screw, and sleeve. More particularly, the invention encompasses a Vilas screw having a first set of threads at one end, such as, a wood screw type threads, and a second set of threads at the opposite end, such as, a machine screw type threads, and with a flange nut between the two different sets of threads. The present invention is also directed to a Vilas screw having a first set of threads at one end and a second set of threads at the opposite end where the second set of threads are inside a blind hole and with a flange nut on the outer surface of the shaft. The invention also encompasses a Vilas sleeve, a Vilas nut, a Vilas screw, a Vilas stud, a Vilas bolt, and combinations thereof, and wherein each has mating capabilities.

Abstract: A standoff adaptor for a threaded hollow wall anchor for mounting an item to a wall. A threaded member has a washer mounted thereon with a recess to receive and contact the head of a mounting anchor. The distal end of the threaded member is received into a standoff having at its opposite end a bolt threadedly mounted thereto for holding an item between the bolt and standoff.

Abstract: A fastener arrangement includes a threaded member having threads extending from a first end to a second end. The threads have a thread contour provided by a load and clearance flank surfaces joined to one another by a crest and root. For the external threaded member the crest provides a crest diameter, and a root provides a root diameter and is arranged between adjoining threads. At least one thread near the first end has a weakened thread contour that decreases rigidity of the one thread compared to other threads, enabling axial loads to be distributed more evenly between the threads.

Abstract: A device for fastening side impact supports, and door or flap hinges (10) to the doors (12) or flaps or to the bodywork of motor vehicles, with a screw (141) which extends through an opening in the door (12), the flap or the bodywork sheet and through an opening in the side impact support or hinge (10), and is secured by a nut (16), in which a hollow absorber element (18) is arranged between the nut (16) and the sheet of the door (12), the flap or the bodywork or the side impact support or the hinge (10), which absorber element is penetrated by the screw (14?) and has side walls (20) which run substantially parallel to the axis of rotation of the screw (14?), and two abutment surfaces (22, 26, 34) each running perpendicularly to the axis of rotation of the screw (14?), wherein the one abutment surface (26, 34) is supported on the sheet of the door (12), the flap or the bodywork or the side impact support or the hinge (10) while the other abutment surface (22) bears the nut (16).

Abstract: An encapsulated fastener includes a nut having a face with a concave gap adapted to receive a bolt. The nut is encapsulated by an encapsulation including an extension, which includes a tube adapted for receiving a portion of the bolt and a flange adapted for engaging a face of the nut. The encapsulation extension is placed on the nut in an overmolding tool, wherein an encapsulation base is injection molded over a portion of the encapsulation extension. The encapsulation base encapsulates the nut and extends into the nut concave gap forming a base foot and washer protrusion. The nut is encapsulated except for its bore which is sealed off during the overmolding process by a spring-mounted mandrel. Alternative embodiments of the invention include tubes with different configurations for contacting the bolt whereby the tube or cylinder is reinforced. A method and tooling for manufacturing the encapsulated fastener are also provided.

Abstract: A thread-producing nut for a screwed connection, wherein a core hole which is provided with thread turns is designed for positively locking, frictionally locking and releasable connection to an, in particular, cylindrical bolt or pin, in such a way that the thread turns have completely formed thread turns in certain sections when viewed in the circumferential direction and that free spaces with thread turns which are formed incompletely in terms of their height are provided between the completely formed sections of the thread turns. Furthermore, a blank for manufacturing the nut and a screwed connection composed of such a nut and a bolt are disclosed herein.

Abstract: A nut and screw set for reducing the amount of hindered motion therebetween is disclosed. The nut and screw set includes a screw and a nut. The screw includes a plurality of screw threads. The nut includes a plurality of nut threads. The nut threads are threadably engagable with the screw threads. The nut threads are sized reduce hindered motion between the screw and the nut as a result of thermal expansion of the screw and the nut.

Abstract: A wall mounting assembly includes a threaded bolt having a longitudinally extending bore, an anchor bar, a cord, and a bushing configured to plug the hole in the wall. The bolt and anchor bar, attached by the cord, can be introduced through a hole in the wall and, by retrieving the cord, the threaded bolt can be caused to insert through a bolt hole in the anchor bar, and through the bushing aperture plugging the hole in the wall, thereby drawing the anchor bar flush against an interior surface of the wall. A fixture back plate positioned between an exterior surface of the wall and an end of the bolt, can be secured against the exterior surface of the wall by tightening a nut onto the threaded bolt, thereby also securing the anchor bar flush against the interior surface of the wall.

Abstract: There is provided in a preferred embodiment of the present invention a connector system and method of assembly comprising a frame and a plurality of legs that are combined to form a table. The frame includes a plurality of side members having an open interior and a plurality of corner members that are positioned in the interior of the side members. A plurality of bolts is positioned through the frame and into the legs to secure the frame to the legs and form a table.

Abstract: A shutter panel assembly is provided to protect a building opening from impact damage. The building opening includes a frame with a bore formed therein and an externally threaded elongated anchor having an exposed portion extending outwardly from a bottom surface of the bore. The shutter panel assembly includes a shutter panel and a fastener. The shutter panel having a first surface, an opposite second surface, and an aperture extend between the first surface and the second surface. The fastener having a shank portion and a flange portion. The shank portion having an internally threaded hollow portion adjacent a distal open end of the shank portion. The flange portion extending radially outwardly from a proximate end of the shank portion.

Abstract: A deck assembly for a skateboard includes a deck that defines a pair of sets of passages corresponding with openings in mounting structures used for mounting trucks to the deck. A number of male connectors correspond with respective passages and openings, each male connector having an externally threaded shank, a head on a distal end of the shank and a tool engaging formation defined on a proximal end of the shank. A number of female connectors correspond with respective passages and openings, each female connector defining an internally threaded barrel, open at both ends, and a flange on a proximal end of the barrel.

Abstract: A connector assembly comprises a base part that defines a through-hole for receiving a bolt and also defines an aperture for receiving a device having a first end that fits through the aperture in the base part and a second end that does not fit through the aperture in the base part. The first end of the device defines a bolt-hole for engaging with a bolt extending though the through-hole in the base part. The second end of the device comprises opposing outer surfaces that engage the base part and thereby prevent the device from passing completely through the aperture, and also align the bolt-hole in the device with the through-hole in the base part when the first end of the device is inserted into the aperture.

Abstract: A device for fastening equipment parts such as photovoltaic panels on a sandwich or single-shell building envelope using a plurality of fastening elements (20, 20?) in the form of bolts, which can be supported at least by a connection part (30, 30?) and on a load-bearing part (12) of the building or the building envelope. If an outer shell (14) is present, the fastening elements (20, 20?) can be guided through the outer shell (14) and supported on the load-bearing part (12) and/or the outer shell (14). Each fastening element (20, 20?) can be positively engaged with the connection part (30, 30?) and/or, if present, with the outer shell (14) so as in each case to support the connection part (30, 30?) on the load-bearing part (12) and, if present, on the outer shell (14).

Abstract: A tri-lobed lug has a centrally disposed aperture which allows the lug to rotate 360° about its axis. Each lobe of the lug can be used to secure an attachment means to it. This could be a rope, strap or other similar structure. Each lobe can also be used to loop such rope, strap, bungee cord hook or other structure through an aperture defined in the lobe. When such structure is secured to the lug, the lug can align itself in a direction of maximum strength. The lug portions further comprise rounded surfaces to prevent cutting or serration of the rope, strap or other similar structure. The tri-lobed lug is also used in an assembly comprising a bolt-like element, a bushing and a nut to attach the lug to a surface. The assembly may further comprise washer-like elements to prevent damage to the surface.

Abstract: A vibration resistant fastening system including a high fatigue strength bolt made from a first material and a nut made from a second material that is softer than the first material of the bolt. The bolt includes bolt threads and the nut includes pre-tapped nut threads that match with the bolt threads. The fastening system utilizes a combination of unique geometry of the nut and bolt threads and a hardness differential between the nut and bolt to provide vibration resistance. When tightened, crests of the bolt threads embed into the soft bearing flanks of the nut threads. Simultaneously with the bolt crest embedment, the softer nut thread crests flow radially inward into the root radius of the bolt threads. This complete contact between the nut and the bolt restricts the nut from moving in a transverse direction relative to a longitudinal axis of the bolt.

Abstract: A two-part coupler suitable for attaching a compression latch accessory (200) an actuator (100) comprising a first coupler member (110) securable to the actuator and being adapted to co-act directly with a second coupler member (220) securable to the accessory, wherein in use rotation of the actuator activates the accessory.

Abstract: An unconventional bolt includes a main body having two heads, and two threaded rods respectively formed at the external surface of each head coaxially with the main body, wherein the cross section of each head has a noncircular shape, and the axial projection of the cross section of the middle of the main body is located in the noncircular axial projection of each head of the main body. The unconventional bolt has a simple structure and a convenient assembly, and can improve the strength and rigidity of the nested profiled components after the connection; and the fastening device using the unconventional bolt can not only support the component but also reinforce it, thus effectively preventing the nested profiled components from transforming.

Abstract: A structural frame assembly is provided that includes mechanically interlocking components. The frame assembly has rails that interconnect with each other at joints that include brackets that engage the rails and nuts that are held in cavities of the rails that are connected to slots that extend through outer surfaces of the rails. Bolts may extend angularly through bores of the bracket and the slots of the rails to operatively engage a nut being held in the cavity. Tightening the bolts may draw the nut angularly through the cavity in a manner that automatically self-aligns the brackets and rails to establish precise joints.

Abstract: A fastener for use in connection with a tubular boss has a shaft with at least one rib along the length thereof and at least one thread segment extending at least partially around the shaft. The shaft is inserted into the boss in first position, and rotated to a second position wherein the at least one thread segment engages at least one column formed in the tubular boss. The shaft can be integrally formed with a first molded part to be fastened to a second molded part with an integrally formed tubular boss. Various locking features for locking the shaft in the boss are also disclosed.

Abstract: A rapid-engaging, positive locking machine screw mechanism comprises a screw having a head and a body wherein the body includes male threads formed thereon wherein the threaded body has at least one longitudinal segment devoid of threads. A work piece defines a hole having female threads formed therein for receiving the screw and further defines in a portion of the hole, at least one longitudinally extending segment devoid of female threads. The longitudinal screw segment devoid of male threads and the longitudinal hole segment devoid of female threads are arranged such that the screw body is longitudinally received in the hole without engagement of the male screw threads with the female work piece threads. The rapid-engaging, positive locking thread configuration can be applied to a variety of mechanical interfaces. Additionally, thread locking configurations, such as a boos-depression interface, a notch and ridge, etc. can be incorporated to secure the male and female threads.

Abstract: An electrical device includes a rear chassis, a fastening member, and an attachment member. The rear chassis has a through-hole. The fastening member is disposed inside the rear chassis. The fastening member has a threaded hole. The attachment member retains the fastening member relative to the rear chassis. The attachment member has a first engaging part that engages with an internal portion of the rear chassis. The screw extends through the through-hole of the rear chassis and screwed into the threaded hole of the fastening member for attaching a wall-mount fixture to an external portion of the rear chassis.

Abstract: Connection means for the mounting of lock details arranged to connect a first element with a second element, which two elements surround a third element, which connection means comprises a first screw means, which is provided with a threaded part to co-operate with a corresponding threaded part in a second screw means to provide an interconnection of the first element and the second element. The connection means comprises an intermediate part, which, in its first end, is provided with a first thread, which is arranged to co-operate with the first screw means for the connection to said first element, and which intermediate part, by its second end, is connected to the second element, the intermediate part in addition being provided with a third thread orientated perpendicular to said first thread, the third element being mounted to the third thread of the intermediate part by an element fixation means.

Abstract: A first element (10) adapted to selectively engage a second element (20), wherein the first element comprises a coating (12) and at least an engaging portion (14) of the first element is coated in said coating, wherein the coating is formed by vapour deposition to provide a thermo-chemically stable layer for temperatures up to 800° C. The coating (12) may comprise one or more of a nitride, oxide or carbide of titanium, chromium or aluminium.

Abstract: A unique self-drilling anchor screw is configured so that it can be set and used to secure a first object to a second object using only one tool to save time and effort. A nut of the screw engages a nut stop when turning in reverse, thereby driving rotation of the screw in reverse. The screw has a drill bit tip adapted for drilling a hole while turning in reverse. A hole is drilled using the drill bit tip while turning the nut in reverse with a socket wrench of the one tool. After drilling the hole, the nut is turned in the forward direction with the socket wrench to engage a sleeve member of the screw, which sets the screw in the second object. Then, the nut is further turned forward using the socket wrench to tighten the nut against the first object located between the nut and the second object.

Abstract: A license plate fastener assembly includes a female collar including an internally threaded cylinder and a radially outboard flared shoulder. A bumper is mounted on the shoulder. A bolt is compatibly received in the threaded cylinder. The bolt presents a bolt head to define a selectively adjustable distance between the bolt head and the bumper. One or more washers made or synthetic resin may be mounted on the cylinder for selective depth adjustment of the distance.

Abstract: A fastener has a metallic member and a nonmetallic cap member. The metallic member has a head and a shaft. The shaft has a first end at the head, a distal second end, and an externally threaded portion. The metallic member further has a projection extending from the head opposite the shaft. The cap member is mated to the head opposite the shaft and retained by the projection.

Abstract: An adjustment bolt for adjusting the camber angle in a vehicle. The adjustment bolt includes a head, a neck, a lobe, and a threaded portion. The head is configured to provide a gripping surface for a tightening tool (e.g., pliers, wrench). The head has a first diameter and a first centerline. The neck extends eccentrically from the bottom surface of the head and the neck has a second diameter and a second centerline. The lobe extends eccentrically outward from a bottom surface of the neck and the lobe has a third diameter and a centerline that is the same as the first centerline. The threaded portion extends eccentrically outward from a bottom surface of the lobe and has a third centerline. The first centerline, the second centerline, and the third centerline are different from one another.

Abstract: The invention refers to a family of fastening devices including at least two fastening elements (101, 121), each one of said elements including a shaped end portion (105), a frontal face (106) of the shaped end portion (105) having a cavity (107) extending as far as a bottom (108), the fastening elements having different maximum grips (Gmax), the family being configured so that the distance (109?) between the bottom (108) of the cavity (107) and the limit (170) between the body and the shaped end portion is identical for all the fastening elements (101, 121). The invention refers moreover to a unit (100) including such a family of fastening devices and a check gauge (150), as well as a method for checking of the choice of the length of a fastening element (101, 121), by means of the check gauge (150).

Abstract: A method of driving a nut on a bolt comprising using a motorized socket drive tool having an open drive socket located in a drive head portion, is provided. A support assembly having a spring loaded biasing portion configured for travel along a torque arrest path, where a torque arrest member is coupled with the spring loaded biasing portion in an operative position, is provided in a coupled arrangement with the motorized socket drive tool. The open drive socket is directed to pass over the nut and the torque arrest member is directed to engage the bolt such that the open drive socket may drive the target nut, while the torque arrest member holds the bolt from rotation. The open drive socket and torque arrest member are respectively released from the nut and the bolt after the nut reaches a predetermined destination on the bolt.

Abstract: A duct access door for use with ducts of circular cross-sections that carry cooking vapors and greases is a “sandwich” type door that has inner and outer arcuate plates, the inner plate being positioned inside the circular duct and the outer plate outside the duct with a heat resistant gasket attached to the outer plate. Strategically located bolts draw the plates together to compress the gasket and prevent leaking of vapors and greases. Sliding captive nut assemblies accommodate the arcuate shape of the inner and outer plates so that the bolts may be tightened.

Abstract: A ballistic resistant through insert with floating capability for stopping a ballistic projectile, comprising at least one of a bullet, a ballistic fragment, and a particle fragment, may comprise a stud, a floating nut, and a cap. The stud may have a flat base portion and a cylindrical stud portion mounted thereon. The cylindrical stud portion may comprise a stud cylinder aperture. The floating nut may be located inside the stud cylinder aperture such that the floating nut floats within the stud cylinder aperture. The cap may have a flat cap portion and a cylindrical cap portion mounted thereon. The cylindrical cap portion may mate with the cylindrical stud portion. The stud may be made of a material for stopping a ballistic projectile. The flat base portion of the stud may have a minimum thickness for stopping a ballistic projectile.

Abstract: A fastener assembly including an internally threaded nut and an externally threaded screw for securing at least two materials together. A combined thickness TM of the materials is less than a length SL of the screw inserted into the materials. The nut includes a head, a shank extending from the head, and an internally threaded bore extending into the shank. The screw includes a head and an externally threaded shank adapted to threadingly engage the internally threaded bore of the nut. An encapsulating plastic layer covers the head of the nut. The plastic layer extends under and covers a bottom surface of the head. The plastic layer has a thickness TE below the bottom surface of the head which is equal to or greater than a difference between the screw length SL and the material thickness TM.

Abstract: Methods and systems for an integrated captive fastener system is provided. A system includes an integrated nut assembly configured to be tethered to a first structure, the nut assembly including at least one of a lock washer and a flat washer coupled to a nut using a retainer, and a bolt configured to be tethered to at least one of the first structure and a second structure, the nut assembly configured to be threadably couplable to the bolt.

Abstract: In the method of fastening aircraft parts together, the following steps are performed: crimping an element onto at least two parts so as to fasten them together; and screwing a screw into the element through at least one other part so as to fasten all the parts together and so as to place a head of the screw in a flush position relative to the other part.

Abstract: A separation fastener assembly includes a housing defining a cavity. A frangible nut is disposed in the cavity. The nut includes a plurality of nut segments. The one-piece frangible nut greatly reduces existing assembly problems and difficulties. Adjacent nut segments are interconnected at fracture lines. A bolt has an end coupled to the nut. A movable element is disposed in the housing and movable from a first position to a second position. In the first position, the nut segments are restrained from radial expansion. In the second position the nut segments are permitted to radially expand for releasing the fastener assembly.

Abstract: Fasteners, such as bolts, nuts and screws, rivets, pins, and retaining rings, made of a highly kinked rigid-rod polyarylene exhibiting outstanding characteristics, notably a high torque and a high tensile elongation, a measure of practical toughness.

Abstract: A female thread member capable of preventing seizing caused by inclined insertion, and being smoothly fastened from any directions in which a bolt is inserted, and a fastening member using the female thread member. A non-thread portion is formed on an inner peripheral surface of a female thread member body having a female thread for a length corresponding to at least one pitch from an end surface on a bolt-inserting side, and a projection which comes into contact with a flank surface of a male thread of an inserted bolt is formed on a line extending from a helical line of the female thread. The female thread member is used in combination with the bolt having no incomplete thread portion, and there is no adverse possibility of seizing regardless of any directions in which the bolt is inserted.

Abstract: A speed nut for engaging a member includes a housing including a first wall having a first opening therethrough for receiving the member and a second wall facing the first inner wall, the first and second walls defining a cavity therebetween; and a plurality of engagement elements arranged in the cavity about a longitudinal axis of the housing to form an opening therebetween, at least one of the engagement elements being freely movable in the cavity between a first position wherein an inner surface of the at least one engagement element is spaced from the longitudinal axis by a first distance for engaging the member and a second position wherein the inner surface of the at least one engagement element is spaced from the longitudinal axis by a second distance greater than the first distance for receiving the member through the opening.

Abstract: There is provided a fastening device in which the tightening load at the engaged portion between the thread of a nut and the thread of a bolt can be made uniform along the length of the threads, the circumferential load distribution at the end of the engagement of the bolt can also be made uniform, and concentration of a stress in the vicinity of the beginning of the engagement can be reduced. The fastening device includes an object to be fastened, having a nut hole; a nut having, at one end, a female screw portion to be fitted in the nut hole and configured such that the center of gravity is located in the nut hole; and a bolt having, at one end, a male screw portion to be screwed into the female screw portion.

Abstract: A fastening system is configured for attaching a board that is spaced apart from a wall stud of an exterior wall. A stud cap is configured to be secured over an edge of the wall stud. A sleeve is configured to be secured to an exterior surface of the board, the sleeve defining a bore. A fastener comprises a shaft extending between a proximal end portion and a distal end, the proximal end portion comprising threads configured to couple with a surface of the bore of the sleeve and the shaft comprising threads configured to penetrate the stud cap and couple with the wall stud.

Abstract: A deck assembly for use with a transporter vehicle is provided. The deck assembly includes a fastener, a first deck panel including an upper support surface, a first side wall and a second side wall, the first side wall defining at least one first opening, the second side wall defining at least one second opening and a second deck panel coupled to the first deck panel, the second deck panel including an upper support surface, a first side wall and a second side wall, the first side wall defining at least one first opening, the second side wall defining at least one second opening. The second side wall of the first deck panel is supported adjacent to the first side wall of the second deck panel such that the at least one first opening of the first deck panel is at least partially aligned with the at least one second opening of the second deck panel to define a through hole for the fastener. The fastener is received within the through hole and secures the first deck panel to the second deck panel.

Abstract: An actuating device for an active control suspension system which is provided at both ends of a sub-frame of a vehicle body and connected to one end of an assist link having the other end mounted at a knuckle and which changes a position of a mounting point of the assist link at the vehicle body, may include a member bracket fixedly mounted at each end of the sub-frame, provided with openings formed at both sides and an upper surface thereof, and formed of a pair of slide grooves having arc shape at the both ends thereof to slidably receive a pair of slide plates therein; an actuator connected to both slide plates through a pin-bolt unit; and a cam-bolt unit assembling a bush of the assist link with both slide plates and setting an initial position of the mounting point of the assist link at the vehicle body.

Abstract: The present invention provides a toy house with cube joint which comprises a roof and a house body, of which the house body is formed by a number of roots, wherein there are some holes for the purpose of forming the roof and house body, of which the holes can connect with the holes of other roots perpendicularly by putting a wood screw into the corresponding holes on two roots. There are connecting holes spreading systematically on each root. A root can be connected with adjacent root or additional facilities by putting a cross nut into the connecting holes with the corresponding holes of adjacent root or additional facilities, and then insert two special fasteners to the corresponding perpendicular holes, the cross nut and the special fasteners (specially designed connectors) will integrate together and the roots and facilities can be connected accordingly. The present invention provides a toy house with cube joint as an enhancement.

Abstract: An anti-wearing nut or bolt including a plurality of polygonal sides circumferentially formed on a head portion of the nut or bolt and; each polygonal side including: two inclined sub-sides respectively inclined outwardly convergently from opposite apexes of each polygonal side, each inclined sub-side extrapolatively defining a small biasing acute angle between each inclined sub-side and a corresponding socket side, and an intermediate sub-side transversely intersecting the two inclined sub-sides; whereby upon a clockwise or counter-clockwise rotation of the socket, one inclined sub-side of the nut or bolt will be planarly engaged with each socket side, without being linearly bitten or dogged, to thereby prevent wearing or damage of the apexes of the nut or bolt.

Abstract: A self-drilling bolt and nut assembly includes a nut which has a window to permit visual inspection of the fastener thread upon engagement with the nut. The nut also includes a protective cap or receives a protective cap so that upon threadably engaging the fastener with the nut, the drill tip of the fastener is automatically received in the cap. The nut also has at one end a plurality of projections to enhance the locking engagement. The self-drilling bolt may have an integral washer and employ a clamping plate engageable against the washer.