Abstract: A circular opening (48) is formed in a structural wall (12). A tubular shank (28) of a nut mounting grommet (26) is inserted into the opening (48). The grommet (26) is moved endwise to place a shoulder surface (34) on the base of a nut mounting cup (30) against the wall (12). A split sleeve (54) is installed on a small diameter portion (62) of a mandrel (52) and the mandrel and sleeve (52, 54) are inserted into the tubular shank (28) from the side of the wall (12) opposite the nut receiving cup (30). The mandrel (52) is then retracted to successively move increasing and maximum diameter portions (64, 66) of the mandrel (52) through the split sleeve (54). The mandrel portions (64, 66) exert a radially outwardly expanding force on the split sleeve (54). The split sleeve (54) in turn imposes a radially outwardly expanding force on the tubular shank ( 28).

Abstract: A nut fixing structure for a resinous case which comprises a nut provided with an antirotative flange and caulking clicks on its respective ends, and a resinous case provided with a nut fitting hole and a flange receiving part. The nut is fixed in the nut fitting hole of the resinous case by bending the caulking clicks outwardly in the state of fitting the nut into the nut fitting hole and engaging the antirotative flange to the flange receiving hole. It is possible to fix the resinous case to the mounting position very firmly.

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-mounting fastener adapted to mount to an aperture in a workpiece, comprising a fastener body having a base and a connecting stem; and a cage formed of a sleeve sized to slidably receive the base, having an opening in at least one side thereof, and having a fixed latch and at least one hinged latch operable and adapted to engage the aperture by the sliding of the base in the sleeve.

Abstract: A nut plate and nut are disclosed wherein the nut plate secures the nut to a mounting plate. The nut plate includes a projection which is adapted to be received by a hole in the mounting plate to prevent relative rotation between the nut plate and the mounting plate. The nut is provided with a flange about a periphery of the nut with a portion of the nut being received within a tubular portion of the nut plate and within an opening in the mounting plate.

Abstract: A chair with a tubular metal frame carrying a seat and backrest. The lower portion of the backrest is connected to the frame by at least one mounting assembly that includes metal straps that are mounted on the front and rear surfaces of the backrest core and connected together by the fasteners that pass through the straps and core. A bracket is secured to the strap on the rear surface of backrest and is welded to the portion of the metal frame which supports the backrest.

Abstract: A self-locking nut having an enlarged head and an elongated shank portion insertable into a hole in a panel. The nut has an integral skirt portion adjacent the underside of the head having a predetermined skirt length, which skirt is then deformed against the underside of the panel to hold the nut in firm position with respect to the panel. The nut may be provided with an irregularly shaped head conforming to a like configured countersunk in the panel leading into the hole to prevent rotation of the nut about its longitudinal axis.

Abstract: A blind fastener and method for making such fastener that has a flanged outer sleeve and a flanged inner sleeve that are secured together, wherein the outer sleeve has a socket that receives a lug from the inner sleeve to provide joint axial movement and wherein the outer sleeve has a plurality of slits that receives at least one radial projection from the inner sleeve to prevent rotation between sleeves. The inner sleeve has a thinner upper portion and a thicker lower portion with a score line therebetween to facilitate the separation of this portion. The inner sleeve has a central threaded bore to receive a threaded bolt for fastening purposes and to upset the outer sleeve relative to the flanged portion thereof to secure such fastener to a thin workpiece.

Abstract: A flush mounting fastener system for threadably attaching a threaded member to a plate or shell structure is described which comprises in one representative embodiment an internally threaded bushing flanged on a first end for attachment to the housing within a hole of preselected size in the housing, a plurality of circumferentially spaced crenelations of preselected size and spacing on the second end of the bushing, an insert threaded on the outer surface for threadably engaging the bushing and on the inner surface for threadably attaching a threaded member to the housing structure, and a plurality of tangs on one end of the insert corresponding in size and spacing with the spaced crenelations in the bushing and being radially outwardly bendable into spaces between the crenelations to lock the insert within the bushing.

Abstract: A safety rivet arrangement for indicating the unauthorized opening of a housing whose wall parts are connected with each other at a separating joint which has a covered outer edge. A safety rivet extends through the connection and is considerably harder than the material of the housing wall parts. The rivet ends are arranged recessed, and the safety rivet is also only loosely peened-over so as to be rotatable. By reason of its high material hardness, and the rotatable arrangement, the rivet cannot be drilled out with some evidence of the drilling.

Abstract: An adjustable spacer (20) is located in a unison ring (16) disposed about a gas turbine engine case (18). The spacer (20) includes a pad bolt (44) having a flattened surface (52) for contacting the case (18). The pad bolt (44) is adjusted radially by a threaded cylinder (28) and adjusting nut (36). The assembly is locked in place by a locknut (54) which includes a frangible link (72) for separating a headed portion (70) from a threaded portion (68).

Abstract: A nut plate and nut are disclosed wherein the nut plate secures the nut to a mounting plate. The nut plate includes a projection which is adapted to be received by a hole in the mounting plate to prevent relative rotation between the nut plate and the mounting plate. The nut is provided with a flange about a periphery of the nut with a portion of the nut being received within a tubular portion of the nut plate and within an opening in the mounting plate.

Abstract: An installation apparatus and method of attaching a female element, such as a nut, to a panel, wherein the panel is pierced and the female element is permanently installed in the pierced panel opening in a continuous operation. The female element includes a body portion and an annular barrel portion. In one of the methods disclosed, the panel is pierced by the free end of the barrel portion and the panel slug is disposed in the barrel portion as the nut is installed in the panel. In the presently preferred method, the panel is pierced by a punch received through the body and barrel portions, prior to driving the female element into a mechanical interlock with the panel. In the preferred installation, the free end of the barrel portion is deformed into a hook-shaped end portion, opening toward the body portion, and the panel is simultaneously driven into the hook-shaped barrel end portion, forming a very secure mechanical interlock.

Abstract: A bush for installation in easily crushed or marred work material such as apertured honeycomb sheet or fibre reinforced plastics material, enables the work material to be secured to a support, by means of a nut and bolt, without damage. The bush has a cylindrical body longer than the thickness of the work, and a flange for abutting a face of the work at one end of the body. The other end of the body has an annular boss which projects beyond the other face of the work, and, peripherally of the boss an annular skirt which during installation can be deformed to provide a retaining flange for engaging the other face of the work. A bolt can then be passed through the bush and a support, and secured with a nut. Only the bush directly engages the work.

Abstract: A blind fastener that is installed from one side only of a hole in a plate structure wherein the blind fastener has a tubular body with a head portion and a sleeve journaled in the tubular body. The tubular body has a plurality of slits that extend longitudinally therealong to facilitate an upsetting or a buckling action wherein the fastener is secured to the plate structure between the buckled portion of the tubular body and the head. The sleeve has a threaded upper portion and flanged end portion that abuttingly engages the tubular body to effect the buckling force thereon. The sleeve is connected to the tubular body to ensure a fluid tight fit.

Abstract: A collapsible fastener and method of making same for joining workpieces which fastener can be fabricated with a single machining operation aside from thread tapping. The fastener comprises a forged sleeve defined by cylindrical exterior and interior surfaces. The sleeve has a head at one end for bearing against one surface of the workpieces, internally threaded tail, and a shank extending between the head and the tail. A plurality of extruded grooves on the exterior surface of the shank are parallel to the axis of the sleeve. An extruded notch in each groove is at substantially the same distance from the head. When a mandrel is extended through the head and the shank and is threaded into the tail, by turning the mandrel the tail may be drawn toward the head whereby the shank splits into strips which fold at the notches.

Abstract: An improved nut fastener is utilize with a back-up plate to perfect a bolted flange joint. The fastener includes a cage having a planar body affixed to the back-up plate in bearing engagement with a surface thereof. Opposed sides upstanding from the cage body are configured to loosely capture a spherical faced washer, a spherical faced nut, and a nut anti-torque collar in self-aligning relation with a joint bolt hole. An extension of either the cage body or the collar is configured to engage the back-up plate in a manner to inhibit rotation of the cage.

Abstract: A threaded insert 22 is restrained from rotation by deformation into a recess 28. The recess 28 is only located in line with a directional stress pattern 34 in the receiving member 18 whereby stress concentration is avoided at high stress locations.

Abstract: An installation apparatus and method of attaching a female element, such as a nut, to a panel, wherein the panel is pierced and the female element is permanently installed in the pierced panel opening in a continuous operation. The female element includes a body portion and an annular barrel portion. In one of the methods disclosed, the panel is pierced by the free end of the barrel portion and the panel slug is disposed in the barrel portion as the nut is installed in the panel. In the presently preferred method, the panel is pierced by a punch received through the body and barrel portions, prior to driving the female element into a mechanical interlock with the panel. In the preferred installation, the free end of the barrel portion is deformed into a hook-shaped end portion, opening toward the body portion, and the panel is simultaneously driven into the hook-shaped barrel end portion, forming a very secure mechanical interlock.

Abstract: A riveting or self-fastening element such as a stud for permanent attachment to a panel preferably having a preformed panel opening, including the method of attachment and the panel assembly. The self-attaching element includes an annular barrel portion having a conical external surface which is press fitted in the panel opening to deform the panel opening and form a mating conical internal surface preventing further penetration of the fastening element into the panel. The free end of the barrel portion, which is preferably cylindrical, is simultaneously deformed outwardly in a die member having an annular die cavity, forming an annular rim which is U or hook-shaped in cross section, wherein the free end is biased against the panel preventing pull-out of the fastening element. The fastening element, method of attachment and panel assembly is particularly adapted for relatively thick metal panels, including panels having a thickness greater than 0.1 inches.

Abstract: A wheel for mounting tubeless tires in which the bead of the tire is sealed and clamped on one or both sides of the wheel. The bead is sealed and clamped by a bead locking ring having a peripheral lip on an axially parallel surface of revolution, terminating in an annulus which mates with a similar surface of revolution formed on one or both ends of the wheel having a matching annulus to which the ring is securely bolted. The annulus on the wheel is provided with a plurality of blind threaded inserts for receiving bolts which pass through the ring, securely clamping the bead between a peripheral lip on the wheel and the lip on the bead locking ring. The locking ring is formed so that the mutual surfaces of revolution on the locking ring and the wheel respectively provide lightweight, reinforced stiffening of the locking ring (i.e. in-plane strength), preventing bending and warping when bolted to the wheel.

Abstract: A blind fastener of the pull through rivet type having a mandrel disposed in a hollow rivet having a flange end and a forming end, the mandrel has a head disposed adjacent the forming end and adapted to be pulled through the rivet body. The invention being in the mandrel head having a predetermined configuration acting on the forming end of the rivet while being pulled through the rivet body to upset the forming end of the rivet to provide inwardly disposed flanges. Additionally, the mandrel head configuration also upsets the rivet body and the opening in the workpiece enabling the rivet to have optimum torque carry capacity.

Abstract: An insertable threaded sleeve provided with an outer screwthread and an inner screwthread for a screw, the outer screwthread being adapted to the screwthread of a tapped hole in an object. An extension adapted to be deformed by a buckling so as to be locked in the screwthread of the hole is provided with an outer knurling which improves the engagement thereof with the screwthread of the tapped hole and a flange on the outer end. The sleeve is replaceable and can be used in particular when the object is made from a soft material whereas the screw is made from a hard material. It may have if desired means for locking the screw against rotation.

Abstract: An improved fastener assembly includes an externally threaded member or bolt having a thread convolution with a relatively long trailing flank surface and a relatively short leading flank surface. An internally threaded member or nut also has a thread convolution with a relatively long trailing flank surface and a relatively short leading flank surface. The nut is grooved to provide an expandable section. When the nut and bolt are tightened, the relatively long trailing flank surfaces of the thread convolutions cause the grooved portion of the nut to expand to completely fill a hole. The opposite end of the nut is contracted to clamp against a thread convolution on the bolt. In one embodiment of the invention, a relatively short leading flank surface of the bolt extends at an acute angle to the relatively short leading flank surface of the nut to provide clearance between the internal and external thread convolutions.