Abstract: A floating fastener includes a base member, a limiter block fastened to one end of the base member and defining an elliptical constraint hole, a locking rod inserted through the non-circular constraint hole of the limiter block and having an annular groove extending around the periphery of the non-circular rod body thereof, a spring member sleeved onto the locking rod and stopped between a stop flange of the locking rod and the limiter block, and a knob fastened to one end of the locking rod and disposed outside the base member and operable to move the locking rod axially relative to the base member and to rotate the locking rod, when the locking rod is moved to the elevation where the annular groove of the locking rod is kept in the non-circular constraint hole of the limiter block, between a constrained position where the locking rod is stopped by the limiter block from axial movement relative to the base member and a released position where the locking rod is released from the constraint of the limiter blo

Abstract: A securing mechanism for a shackle having a pair of opposed legs with an opening at one end of each of the pair of opposed legs to form a pair of opposed openings. The securing mechanism includes a shackle bolt having a head at one end and a circumferential groove near an opposed end wherein the shackle bolt is received through the pair of opposed openings in the shackle. A two piece hinged clamp assembly is received in the circumferential groove in order to retain the shackle bolt in the shackle. A retainer pin is received in an opening in the two piece clamp assembly to hold the two piece clamp assembly in a closed position. A retainer clip surrounds the retainer pin. A lock pin through the two piece clamp assembly retains the retainer pin in the two piece clamp.

Abstract: The invention provides for a retainer for stabilizing a threaded member. The retainer may include a base portion having an opening and an outer perimeter lying in a first plane, the opening having a plurality of elongated sections each extending toward the outer perimeter so as to define in the base portion one or more arms. Each of the aims may have a head section having at least one groove, the head sections being located in a second plane which is parallel to and spaced apart from the first plane. The elongated sections may be symmetrically arranged about an axis. The grooves may be arranged to define at least a portion of a helix. The outer perimeter of the retainer may be circular.

Abstract: A quick-positioning captive screw includes a mounting base member having an outer thread spirally extending around the peripheral wall of a top flange thereof, the outer thread having a leading end terminating in the top edge of the top flange and a tail end terminating in the bottom edge of the top flange and cutting a part of the top flange into a rib, a lock screw having an inner thread located on the inside wall of a plastic cap thereof for threading through the outer thread into the space around the periphery of the mounting base member below the bottom edge of the top flange after bonding of the mounting base member to an external panel frame by reflow soldering, and a spring member sleeved onto the threaded shank of the screw bolt of the lock screw and stopped between the head of the screw bolt and the inside step of the mounting base member.

Abstract: A sleeve for holding a mounting stud in the bore of a ceramic brake disk wherein the sleeve is made of metal and is equipped on one side with a collar, that slip-proof and captive attachment is effected by a flange on the opposite sleeve end, and that neither the collar nor the flange projects over the boundary planes which form the surface of the ceramic brake disk perpendicular to the axis of the bore.

Abstract: A fastener device includes a self-clinching retainer and a blind fastener. The self-clinching retainer is mounted to a hole in a sheet. The blind fastener is at least partially floating within the self-clinching retainer. The blind fastener has blind thread so that any debris from engaging another fastener is captured within the blind fastener.

Abstract: An exemplary fastener includes a head, a shank extending downwardly from a bottom of the head, and a protruding flange extending outwardly from an outer surface of the shank at a position adjacent to the head. A portion of the shank between the head and the protruding flange is formed a neck. An outer diameter of the protruding flange is varying along an axial direction of the shank.

Abstract: A floating fastener includes a mounting socket bonded to a first plate member, a locking member axially movably mounted in the mounting socket and fastenable to a second plate member to lock the first plate member to the second plate member, a first locating ring mounted in the mounting socket around a plain stem of the locking member and adapted for securing a shoulder of the locking member to hold the locking member in a received position temporarily, a spring member mounted around the locking member in the mounting socket and stopped between a head of the locking member and the first locating ring to support the locking member in a floating position, and a second locating ring mounted in the mounting socket to prohibit the locking member from falling out of the mounting socket.

Abstract: A mounting rack structure includes a rack body having a plurality of downward extended supporting legs, each of which is provided near a distal end with an mounting hole; a plurality of mounting hole adapters; and a plurality of fastening elements. The mounting hole adapter includes at least one vertical extension portion with a first retaining flange and a central passage having at least one second retaining flange formed therearound; and is assembled to the mounting hole with the first retaining flange firmly pressed against one side of the supporting leg. The fastening element can be extended through the central passage of the mounting hole adapter to firmly lock the supporting leg and accordingly the rack body to a heat-generating unit. With the mounting hole adapter, the mounting rack structure can be used with different types of fastening elements to save the cost for making different molds.

Abstract: Captive panel fasteners are configured to be held captive on a panel by multiple retaining elements. The fasteners include longitudinal grooves along a cylindrical portion of the fastener, a retaining ring over the cylindrical portion, a primary structure for retaining the retaining ring on the cylindrical portion, and secondary structure for retaining the cylindrical portion within a bore of the panel. The retaining ring includes radially inwardly extending opposing prongs that fit into the longitudinally extending grooves. A stop point may be provided in the longitudinally extending grooves, or an end of the fastener may be flared, to retain the retaining ring on the fastener. The prongs may also be slightly flexible and flared to grip the longitudinally extending grooves. The secondary structure can include one or more spring loaded pins in the fastener extending externally outward.

Abstract: These disclosed embodiments relates to a device for fixing a light-weight panel onto a support. Such device includes an insert including at least one flange, such insert being intended for receiving a fixing device of the bolt type. According to the disclosed embodiments, such flange has an outer surface including toothing elements and the device includes a part made of a ductile material including an opening for the passage of the fixing member. The toothing elements are intended for cooperating, upon fixing the panel onto the support, with the part made of a ductile material to allow such fixing without causing any deformation of the panel.

Abstract: A fastener assembly (1) includes a screw (2) and a bush (3). The screw (2) includes a head (4), a shank portion (6) and a threaded portion (7) including a thread (8). The shank portion (6) is arranged to face the head (4) and the threaded portion (7) is arranged to face away from the head (4). The shank portion (6) has a diameter and the thread (8) has an outer diameter, the diameter of the shank portion (6) being smaller than the outer diameter of the thread (8). The bush (3) includes a first narrowing location (10) having a diameter being smaller than the outer diameter of the thread (8). The bush (3) is captively connected to the screw (2) by the first narrowing location (10). The bush (3) includes at least one resilient element (15) having an actuation portion (28) and an engagement portion (29).

Abstract: A fastener assembly (1) includes a screw (2) and a bush (3). The screw (2) includes a head (4), a shank portion (6) and a threaded portion (7) including a thread (8). The shank portion (6) is arranged to face the head (4) and the threaded portion (7) is arranged to face away from the head (4). The shank portion (6) has a diameter and the thread (8) has an outer diameter, the diameter of the shank portion (6) being smaller than the outer diameter of the thread (8). The bush (3) includes a first narrowing location (10) having a diameter being smaller than the outer diameter of the thread (8). The bush (3) is captively connected to the screw (2) by the first narrowing location (10). The bush (3) includes a second narrowing location (11) including at least one resilient element (15) being designed and arranged to elastically engage the thread (8). The bush (3) includes a slot (17) or a gap (19) being designed and arranged to continuously extend over the bush (3) in an axial direction.

Abstract: A captive screw includes a screw member and a tubular elastic member. The screw member includes a threaded post and a screw head positioned at an end of the threaded post. The tubular elastic member is sleeved on the threaded post and is tightly fitted with the threaded post. The tubular elastic member further includes a fold formed on the outer surface and spirally extending from one end of the tubular elastic member to the other.

Abstract: A fastener assembly comprises a first cylindrical member disposed within a second cylindrical member. One is movable relative to the other one in a first direction, and locked in a second direction opposite to the first direction. A spring is operably attached to the members to urge the one in the first direction. The members include opposing first and second cylindrical walls, respectively. A resilient member is disposed between the walls. One of the walls includes a first receiving volume configured to fully receive the resilient member and the other wall a plurality of second receiving volumes configured to only partially receive the resilient member.

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: Herein is disclosed a fastening assembly that may be used for securing first and second workpieces to each other in such manner as to provide vibration isolation between the first and second workpieces. The fastening assembly comprises an elongated, rigid fastener, and an elastomeric bushing, that are integrally secured together.

Abstract: A retainer ring including an outer ring having an exterior surface, an interior surface, and a plurality of spring beam elements extending inwardly from the interior surface, and a central aperture. Each of the spring beam elements includes an elongated arm having a first end attached to the interior surface of the outer ring and a second, free end opposite the first end. Each of free ends of the arms includes a tab portion and a pressure pad that extends from the tab portion. The retainer ring captivates pin members, such as bolts, onto work pieces, such that the pressure pads engage and align with an annular groove of the bolt. When the bolt engages the retainer ring, each of the spring beam elements is displaced and expands radially from a free position to an expanded position in order to enable the bolt to travel through the aperture. The retainer ring captivates the bolt onto the work piece, while providing a positive hold out of the bolt.

Abstract: A fastener including a bolt and a grommet assembly attached to the bolt for fastening to a work piece. The grommet assembly includes an upper grommet, a lower grommet attached to the upper grommet, a retainer ring, and a housing that houses the retainer ring within the lower grommet. The upper grommet is inserted into a hole at one side of the work piece and the lower grommet is attached to the upper grommet through the hole at an opposite side of the work piece. The retainer ring is inserted into the lower grommet and encapsulated by the housing. The bolt is inserted into the grommet assembly, and the retainer ring engages the bolt such that a plurality of pressure pads extending from a plurality of corresponding spring beam elements of the retainer ring reside in an annular groove of the bolt. The grommet assembly captivates the bolt onto the work piece, while providing a positive hold out of the bolt.

Abstract: A method for making a barrel for plate member fastener and installing the barrel in a first metal plate member for enabling the plate member fastener to affix the first metal plate member to a second metal plate member is disclosed to include the step of machining a metal base material into a barrel having a bottom bonding flange and a bottom extension tube around a bottom opening thereof and then affixing a solder mask to the bottom extension tube around the bottom opening and the step of fitting the bottom extension tube of the barrel into a mounting through hole of the first metal plate and abutting the bottom bonding flange of the barrel against a solder paste at the top wall of the first metal plate member and then applying a reflow soldering process to bond the bottom bonding flange of the barrel to the top wall of the first metal plate member.

Abstract: A fastening means for pre-assembly of a pin-shaped joining means in a through-hole of a structural element comprising a cylinder barrel-shaped sleeve, a plurality of first holding elements disposed at the inner side of the sleeve and projecting inwards, and a plurality of third holding elements disposed at the outer side of the sleeve and projecting outwards, and second holding elements projecting outwards from both ends of the sleeve, that project farther outwards than the third holding elements, and that are elastically deformable, such that upon insertion of the fastening means into the through-hole, they perform an evasive movement.

Abstract: An assembly includes a piece to be held in a bore and a device in which the piece is inserted for holding the piece in the bore. The device comprises a cylindrical sleeve having a series of fins extending longitudinally of an inner surface of the sleeve and projecting inwardly from the inner surface. The fins are skewed in a same circumferential direction relative to radial planes of the sleeve. The sleeve and the fins are integrally formed of resilient flexible plastic. The flexibility of the fins is such that the fins can be readily deflected when engaged by an inserted piece. The device can be used as part of a combination that includes a body having a bore therein, and can be used in a method of holding a piece in a bore of a body.

Abstract: A fastener includes a sleeve and a rod received in the sleeve. The sleeve includes a top end including at least one outer flange extending radially outward therefrom and at least one inner flange extending radially inward therefrom and a lower end including at least one spring tab. At least one spring tab comprises an outer flange at its end that extends radially outward. the sleeve is inserted into the receiving holes of the top article and the bottom article until the outer flange of the top end rests on the top plate, the rod is then pressed to move to drive at least one spring tab to deflect outwardly until the outer flange of at least one spring tab is held in contact with the bottom plate.

Abstract: A captive fastener assembly that employs a concentric collar protrusion protruds from the bottom circular edge of the screw hole, surrounds the lower transitional shaft of the fastener to hold the fastener steadily aligned with the receiving hole when the to-be-fastened parts as being opened or closed.

Abstract: The invention has a captive tooless fastener for securing the engine intake air filter. The tooless fastener comprises shaft and associated bodies. The body has two arms oriented about 180 degrees apart. The shaft is threaded through a sealing washer and an aperture in a closed end cap of the air filter. The shaft is expanded so it cannot be removed from the end cap. The body's threaded inner diameter mates with a threaded portion of a central shaft in an air filter housing. The body's arms are rotated to screw the fastener and the shaft of the housing together. When tightened, the sealing washer closes the aperture. To remove the air filter, the fastener is unscrewed from the shaft of the housing and in the shaft floats in the aperture. A person in the field can remove the air filter by inserting fingers under the arms and pulling.

Abstract: A mounting assembly is provided for use in mounting a printed circuit board to a computer chassis. The mounting assembly includes standoffs attached to the chassis wall to extend outward into the chassis. Each standoff includes an elongated body and a neck extending from the body and having a smaller diameter than outer dimensions of the body. Each standoff includes a head extending from the neck. The mounting assembly includes retention assemblies that are mounted to the printed circuit board. Each retention assembly includes a spring-force retention member (such as a single coil of a ring spring) with an inner passageway with an at rest diameter smaller than the head. The printed circuit board is mounted to the chassis wall by pressing the printed circuit board onto the standoff elements, which are clasped by a spring force applied by each of the spring-force retention members on the standoff necks.

Abstract: The invention provides for a retainer for stabilizing a threaded member. The retainer may include a base portion having an opening and an outer perimeter lying in a first plane, the opening having a plurality of elongated sections each extending toward the outer perimeter so as to define in the base portion one or more arms. Each of the aims may have a head section having at least one groove, the head sections being located in a second plane which is parallel to and spaced apart from the first plane. The elongated sections may be symmetrically arranged about an axis. The grooves may be arranged to define at least a portion of a helix. The outer perimeter of the retainer may be circular.

Abstract: A metal plate member fixation device includes a barrel for bonding to a mounting through hole of a first metal plate member, a lock screw bolt inserted through the barrel for threading into a screw hole of a second metal plate member to lock the first and second metal plate members together, a cap molded on the head of the lock screw bolt, a spring member sleeved onto the shank of the lock screw bolt and stopped against the shoulder of the lock screw bolt and an annular inside step of the barrel, and a compressively deformable annular stop member positioned in an annular inside locating groove in the barrel around the shank of the lock screw bolt for stopping against one end of the thread of the lock screw bolt to prohibit escape of the lock screw bolt from the barrel.

Abstract: A quick-positioning screw assembly includes a cap having an inside annular flange and a locating groove or locating rib extending around the inside wall, a mounting socket bonded to a mounting through hole of a first plate member and having a top positioning flange extending around the periphery and detachably forced into engagement with the locating groove or locating rib of the cap, a screw press-fitted into the inner diameter of the inside annular flange of the cap for threading into a screw hole on a second plate member to secure the first plate member to the second plate member, and a compression spring mounted in the cap around the screw and stopped between the inside annular flange of the cap and an inside annular flange of the mounting socket.

Abstract: A fastener includes a socket for fastening to a mounting through hole of a first metal plate member, a screw member inserted through the socket for threading into a screw hole of a second metal plate member to joint the first and second metal plate members together, a barrel molded on the head of the screw member and axially movably coupled to the socket for enabling the screw member to be moved axially relative to the socket and rotated with the barrel relative to the socket and having interference devices protruded from the inside wall for friction engagement with the socket, and a spring member sleeved onto the shank of the screw member and stopped between the head of the screw member and an inside annular flange of the socket.

Abstract: The present invention provides a linear fastening system capable of rapid engagement and disengagement. More specifically, the system utilizes a cooperating collet member and a compression ring member which are constructed and arranged to slip easily over a shank member. The fastener system is secured by linearly traversing a compression member in an overlapping fashion over the collet member thereby utilizing ribbed surfaces to compress the collet member to grip the outer surface of the shank member. In this manner, the linear fastener system is capable of providing a precise, secure, and reproducible connection between multiple components without the need to apply rotational torque to the assembly.

Abstract: A captive structural fastener including an integral hold-out feature is provided. The fastener includes a stud assembly including a stud, a retaining ring including two oppositely disposed tabs protruding toward the center of the retaining ring, a first sleeve that is matingly engageable with a second sleeve, the second sleeve including an inwardly disposed channel for receiving the retaining ring; and a receptacle assembly, the receptacle assembly including a bracket constructed and arranged to be secured to a panel, an internally threaded nut, a retaining clamp for securing the nut in the bracket, and a grommet assembly including means defining a bore for receiving the stud therethrough.

Abstract: A mounting unit (1) serves to rotatably and captively fasten a screw (2) to a mounting part (3), especially the fastening eyelet (4) of a belt buckle of an automobile, a truck or a different commercial vehicle. The mounting unit (1) includes a screw (2) including a head (5), a shank portion (6) and a threaded portion (7) including a thread (8), the shank portion (6) being arranged in a region between the head (2) and the threaded portion (7).

Abstract: A fastener assembly including a retention and alignment element used in combination with a first component having a cylindrical wall defining a bore and a second component having an elongated shaft for insertion into the bore of the first component. The retention and alignment element comprises a plurality of elongated polymeric protuberances, each having (i) a base fixed to the cylindrical wall of the first component, (ii) a height sufficient so that together the free ends of the protuberances define a passageway that creates an interference fit with the shaft of the second component, and (iii) a length sufficient to maintain the shaft of the second component generally collinear with the axis of the bore of the first component.

Abstract: The invention relates to a combination of a screw member comprising a screw head, a threaded portion and a shank portion which is arranged between the screw head and the threaded portion and has an external diameter that is smaller than the external diameter of the threaded portion, a washer incorporating a passage opening for the screw member and a sleeve the internal diameter of which is greater than the external diameter of the threaded portion of the screw member, whereby said combination is producible in a simple manner but it is nevertheless ensured that the sleeve and the washer are held securely on the screw member.

Abstract: According to one embodiment, a fastening device comprises an object having a through hole, and a fastener which fixes the object to a support by being screwed into a screw hole. The fastener includes a gripper and a stopper. The gripper is capable of protruding outside of the object from the through hole and getting into the through hole, and has an end surface on a side opposite to a male screw portion. The stopper is positioned between the male screw portion and the gripper. In a state in which the male screw portion is screwed into the screw hole, the end surface is positioned inside the through hole. In a state in which the male screw portion is removed from the screw hole, the gripper protrudes outside of the object from the through hole, and the stopper is caught in the object and holds the fastener to the object.

Abstract: A screw attachment (10, 10?, 10?) disposed around a fastening piece (17) secured to a main fastening body (25a), the screw attachment sandwiched between a head (17b) of the fastening piece and a securing object (22) so that the screw attachment bears a securing force of the fastening piece to press the securing object. The screw attachment includes a pair of arms (12, 13) made of a shape restoring material. Each arm has a fore end, and the fore ends are joined to each other with an adhesive material that is softened when heated. The arms expands radially such that the screw attachment is released from the head of the fastening piece when heat or force is applied to the arms.

Abstract: An apparatus comprises a fastening member, a complimentary fastening member, and a retainer member. The fastening member has a first end, a second end, a channel located at the first end, outer threads located on an outer surface of the fastening member, and inner threads located on an inner surface of the channel. The outer threads of the fastening member are closer to the first end than the second end. The complimentary fastening member has a channel and inner threads located within the channel. The inner threads of the complimentary fastening member are capable of engaging the outer threads of the fastening member. The retainer member has a threaded end. The retainer member is capable of entering the channel of the complimentary fastening member and the threaded end of the retainer member is capable of engaging the inner threads of the fastening member.

Abstract: The present invention provides a linear fastening system capable of rapid engagement and disengagement. More specifically, the system utilizes a cooperating collet member and a compression ring member which are constructed and arranged to slip easily over a shank member. The fastener system is secured by linearly traversing a compression member in an overlapping fashion over the collet member thereby utilizing ribbed surfaces to compress the collet member to grip the outer surface of the shank member. In this manner, the linear fastener system is capable of providing a precise, secure, and reproducible connection between multiple components without the need to apply rotational torque to the assembly.

Abstract: The present invention is a housing for a surface-mountable device such as a security device (a PIR, a microwave motion detector, and the like). The housing has a surface-mountable housing portion with at least one aperture for receiving a surface-mounting member therethrough, the housing portion fabricated substantially from a plastic material. A member-retaining portion is integrally molded with the housing portion and extends substantially perpendicular from said housing portion, said member-retaining portion adapted to receive a surface-mounting member when inserted therethrough and retain said surface-mounting member in place. As a result of this configuration, when a surface-mounting member such as a screw is inserted therethrough, the surface-mounting member is held in place by the member-retaining portion and is insertable through the aperture when pressure is applied thereto.

Abstract: A fastening device for a heat sink includes a one-piece shaft. The shaft includes a head at one end thereof, an engaging section at an opposite end thereof, a connecting section between the head and the engaging section, and a tray extending above the engaging section. A spring surrounds the connecting section between the head and the tray of the shaft. A gasket engages with the connecting section of the shaft and is retained between the spring and the tray of the shaft. In this way the shaft, the spring and the gasket are assembled. The gasket extends a downward, annular sidewall for engaging in the heat sink, by which the fastening device can be stably fixed to the heat sink. A back plate extends a nut toward the shaft for engaging with the engaging section of the shaft.

Abstract: A fastener assembly (1) includes a screw (2) and a bush (3). The screw (2) includes a head (4), a shank portion (6) and a threaded portion (7) including a thread (8). The shank portion (6) is arranged to face the head (4) and the threaded portion (7) is arranged to face away from the head (4). The shank portion (6) has a diameter and the thread (8) has an outer diameter, the diameter of the shank portion (6) being smaller than the outer diameter of the thread (8). The bush (3) includes a first narrowing location (10) having a diameter being smaller than the outer diameter of the thread (8). The bush (3) is captively connected to the screw (2) by the first narrowing location (10). The bush (3) includes at least one resilient element (15) having an actuation portion (28) and an engagement portion (29).

Abstract: A screw structure with a stop ring includes a screw, a ferrule, and a stop ring. The stop ring is fitted on a threaded shank of the screw to push against a front end of the ferrule, so that the ferrule is pressed against a head of the screw. With the ferrule being firmly pressed against the head of the screw by the stop ring, the ferrule will not sway relative to the screw, allowing the screw structure to be stably sucked with a sucking tool and be highly accurately assembled to a printed circuit board.

Abstract: A bracket and nut assembly includes a first bracket, a second bracket and a captured nut. The first bracket includes a body with first end having with an aperture extending therethrough. The second bracket includes a first end with an elongated aperture and a second end moveably attached to the body portion of the first bracket. A captured nut is retained within the elongated aperture. The nut includes a first piece coupled to a second piece and is axially translatable and rotatable within the elongated aperture.

Abstract: Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment including a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a preferably right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within the enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, and a removable cover configured to engage said enlarged second end portion to at least partially enclose said rotar

Abstract: A snap fastener has female and male snaps. The female snap, and in one embodiment the male snap, are thermoformed from sheets of thermoplastic material having a uniform thickness, in integration with the objects which the snaps are provided to join. In one use, an array of spaced-part fasteners is used to join a rear portion of a vehicle cargo liner to a front portion thereof. The fastener has particular application in fastening thermoformed articles of low flexural modulus.

Abstract: An improved lock device includes: a ferrule having a through hole disposed at the center of the ferrule, and a groove disposed around the external periphery of the through hole; a locking unit having a force exerted portion and a screw rod that passes through the through hole; a resilient element sheathed onto the screw rod, and an end of the resilient element being disposed in a groove around the ferrule, and another end of the resilient element pressing against a surface of the force exerted portion; and a knob fixed onto the force exerted portion and movably coupled to the ferrule. Therefore, the resilient element can be fixed between the ferrule and the locking unit, and covered with the knob for preventing the resilient element from being damaged by external forces or tilted by external objects to achieve a better stability of using the resilient element.

Abstract: A socket connector for electrically connecting an IC package and a printed circuit board, includes a housing receiving a number of contacts, a stiffener surrounding the housing, a cover pivotably mounted at an end of the stiffener to cover the housing and a lever pivotably mounted at an opposed end of the stiffener to retain the cover to the stiffener, a number of washers mounting to the stiffener and a number of screws for mounting the stiffener to the printed circuit board. The washer has a pinhole and a number of teeth upwardly extending along a circle circumference of the pinhole. The screw is hold to the washer by the teeth of the washer before the screw engaged with the printed circuit board.

Abstract: An exemplary locking assembly includes a locking member, a lock washer and a sleeve. The locking member includes a locking portion. A sleeve defines a through hole for holding and guiding the locking member. The lock washer is positioned in the through hole of the sleeve for preventing the locking portion of the locking member to slide out of the sleeve without an external force.

Abstract: A fastener assembly (1) includes a screw (2) and a bush (3). The screw (2) includes a head (4), a shank portion (6) and a threaded portion (7) including a thread (8). The shank portion (6) is arranged to face the head (4) and the threaded portion (7) is arranged to face away from the head (4). The shank portion (6) has a diameter and the thread (8) has an outer diameter, the diameter of the shank portion (6) being smaller than the outer diameter of the thread (8). The bush (3) includes a first narrowing location (10) having a diameter being smaller than the outer diameter of the thread (8). The bush (3) is captively connected to the screw (2) by the first narrowing location (10). The bush (3) includes a second narrowing location (11) including at least one resilient element (15) being designed and arranged to elastically engage the thread (8). The bush (3) includes a slot (17) or a gap (19) being designed and arranged to continuously extend over the bush (3) in an axial direction.