Abstract: An anti-theft device secures a removable body part, such as a viewing unit, to a microscope stand. The device is intended to replace a common thumbscrew used to fix the location of a removable body part in a corresponding guide of the microscope stand, and comprises a housing threaded into a tapped hole in the stand for carrying a plunger and a driver both movable within an axial passageway in the housing. The driver is threadably adjustable by hand between driving and non-driving positions with respect to the plunger, and the plunger has a limited range of motion so that it may retract enough to allow the removable body part to be adjusted within the guide but not enough to allow the body part to be removed from the guide when the driver is in a non-driving position. The housing is tightened onto the microscope body by a tool such as a wrench, and the driver is held captive by a snap ring fitting within an internal groove near a trailing end of the housing.

Abstract: A fastener having a tamper-evident sleeve thereon. The fastener has a shank and a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The sleeve is on the inner head and prevents a tool from being engaged with the sleeve for removal of the fastener without there resulting some indication that someone has removed or tried to remove the fastener.

Abstract: A hitch pin used for releasably connecting a load carrier frame to a receiving hitch attached to a carrying vehicle for transporting objects such as bicycles on the load carrier. The hitch pin includes a bolt having a head portion opposite a threaded section and a stem integrally formed between the head portion and the threaded section. A sleeve includes a bore, sized to receive the head and the stem of the bolt which is slidably held inside the bore of the sleeve using a transverse pin, secured inside the bore of the sleeve and passing through an elongate slot in the stem of the bolt. When the sleeve is rotated, the transverse pin transmits the rotation to the bolt providing the turning motion used during connecting of the frame to the receiving hitch. The connection may be made in two stages with hand-tightening as the first stage, followed by application of mechanical force, operating from a set screw, through the bolt to intensify the contact between the frame and the receiving hitch.

Abstract: The present invention relates to locking devices and in particular to apparatus and methods for securing components to a bicycle frame (60). A first exemplary embodiment of a locking device (100) includes a first retainer (120), a second retainer (170) and a key (190). The first retainer (120) includes a coupler (124) which is configured to couple with a coupler (196) on key (190). The first retainer (120) further includes a first radial surface (130) having a frusto-conical configuration. The second retainer (170) includes a tab member (174) configured to prevent the rotation of the second retainer (170) relative to the bicycle frame (60). In a second exemplary embodiment of a locking device (300) includes a first retainer (320), a sleeve (360), a second retainer, and a key. The first retainer (320) includes a coupler (324) which is configured to couple with a coupler on the key.

Abstract: A device for protecting threaded shafts and nuts against corrosion. The device covers and protects a nut and the exposed portion of a threaded shaft from corrosion found in harsh environments by holding grease in place over the nut and shaft.

Abstract: A cabinet includes a base having a receptacle. A door is pivotally connected to the base. A fastener is mounted to the door. The fastener has a head and a tip. The fastener has an extended position, in which the tip of the fastener projects from the door towards the receptacle. The tip of the fastener is attachable to the receptacle. A spring biases the fastener towards a retracted position, in which the tip of the fastener does not project from the door. A guide may be mounted to the door, for slidably receiving and aligning the fastener. A pair of cup washers may be included between the head of the fastener and the door. A downwardly facing cup washer contains the spring, and an upwardly facing cup washer provides security by preventing the fastener from being manipulated by a standard socket or wrench.

Abstract: A security seal for a collar used for tensioning springs in garage door assemblies. A collar typically includes at least one set screw projecting outwardly and at least two winding holes. The security seal of the invention includes a generally longitudinal piece of flexible material having two opposite ends, the opposite ends being provided with a locking system for locking the opposite ends together in a permanent fashion. The seal also has at least one hollow cup adapted to receive the at least one set screw and at least two solid cups, each of the cups being adapted to fit with a corresponding winding hole. The hollow cup and the at least two solid cups are disposed on the security seal so that when the seal is locked above the collar, the hollow cup and the solid cups are in registration with the at least one set screw and the at least two winding holes respectively.

Abstract: A tamper resistant fastener, which can only be rotated with a specific key, is described. The fastener includes a head for rotation about a vertical axis. The head is provided with the least two cutouts in the head of the faster spaced away from the vertical axis, the cutouts having a discontinuous sidewall. The side wall of each of the cutouts has a first generally vertical engaging surface for engagement by a mating member on a specific key for clockwise rotation of the head about the vertical axis and a second generally vertical engaging surface for engagement by the mating member on the specific key for counter clockwise rotation of the head about vertical axis. The side wall of the cutout is interrupted adjacent the second engaging surface to prevent engagement by a tool other than the specific key and thereby prevent rotation of the fastener in a counter clockwise direction by a tool other than the specific key.

Abstract: The present invention provides a novel fastener having a tamper indicating tool engaging drive head. The fastener has a shank including a threaded shank portion. The fastener also has a double-headed driving portion that is integrally formed with the shank. The double-headed portion includes an outer head for driving the fastener into a work piece or nut and an inner head for removing the fastener from an assembly. The inner head is joined to the outer head such that the inner head is positioned between the outer head and the shank. Extending portions extend from tool engaging surfaces of the inner head. In use, the fastener is driven into an assembly via a proper tool that engages with the outer head. The outer head shears off the fastener when the desired torque is achieved, leaving only the shank within the assembly and the inner head exposed.

Abstract: A device for preventing disconnection of a coupling. The device includes a main body portion having defined therein a fastener chamber and an opening in communication with the fastener chamber. The opening is located above the fastener chamber. In a preferred embodiment, a standard size socket cannot be inserted into the opening.

Abstract: A locking device for securing outboard motors and stern drives mounted on a plurality of exposed studs on the stern of a boat, and construction equipment on a plurality of exposed studs inset in concrete or other media. The invention consists of a stainless steel lock nut, a lock body, and a lock assembly having a lock catch.

Abstract: A lug cap includes a detent along the inner wall. The detent has an engaging surface that begins shortly after a threaded portion of the lug cap ends. The engaging surface ramps up to a top surface that runs parallel to the inner wall. The lug nut engages the detent which prevents the rotation of the lug cap with respect to the lug nut by increasing the force required to loosen or tighten the lug cap from the lug nut.

Abstract: The invention is a tamper-evident fastener comprising a fastener-thermomshrinkable sleeve assembly and method of using the assembly. The device includes a thermoshrinkable sleeve that fits over a fastener having a shaft and head. Upon placing the fastener and sleeve in a position of use and heating the thermoshrinkable sleeve, the sleeve shrinks to substantially conform to the configuration of the fastener head it surrounds and provides a protective sheath that must be dislodged or removed to alter the position of the fastener. The sleeve may additionally function as a washer between the fastener and the object receiving the fastener. One example of use of this device is as a motor oil drain plug.

Abstract: The present invention is a roofing fastener assembly. The assembly includes a fastener, a barbed washer, and a screw. The screw projects through the fastener and exits the free end of the fastener. Upon installation of the screw and fastener, the barbs of the washer penetrate into the roof membrane and insulation layer. An extending rim on the washer receives the head of the fastener to resist the relative lateral movement of the washer and fastener. Stabilizing fingers project from a free end of the fastener and hold the screw in place during assembly.

Abstract: A nut covering device comprises the following: a cover assembly, including an inner cover, outer cover, and a first constraining mechanism; a second constraining mechanism; and a third constraining mechanism. The first constraining mechanism constrains so that there is no relative motion of the outer cover with respect to the inner cover in an axis direction. The second constraining mechanism constrains so that there is no relative motion of the inner cover with respect to the nut member in the axis direction. The third constraining mechanism constrains so that there is no relative motion of the outer cover with respect to the nut member in the axis direction at least in the removal direction. When a circumferential phase of the inner cover and the outer cover is matched with a predetermined specified phase, second and third constraining mechanisms are released, and the cover assembly can be removed from the nut member.

Abstract: A spinal implant assembly is provided which has a stabilizer rod clamped into position within an anchor by means of a sliding closure member including a mating set screw or hook. The exterior faces of the anchor are contoured to optimize interface in the surgical setting. The anchor includes a U-shaped channel having multiple undercut surfaces such as grooves, which mate with flange like projections or “dovetails” of a closure member which is slid in a direction corresponding to the longitudinal axis of the rod. The closure member has on either side a flange mating with opposing recesses formed at the top of the U-shaped channel so as to lock the closure member in place. The set screw has an external hex head for tightening, and a plurality of radically extending prongs which are undercut and which mate with the recesses in the top of the U-shaped channel of the anchor. The hex head sheers at a necked area above the radial collar to provide for a flush surface relative to the closure member.

Abstract: A noncircular-based undulating key-receiving configuration, opposed undulating side walls in said configuration, a centerline within said side walls, with the centerline of the configuration lying within inner and outer noncircular perimeters. A key-receiving configuration containing a first undulating configuration within a second undulating configuration. A key having a first body insertable within a second body with both bodies having undulating key configurations thereon. A key-receiving groove having chamfered edges.

Abstract: The present invention entails an enclosure that encompasses and protects a lug and lug nut extending from a wheel hub. Structurally, the enclosure comprises an end wall, a surrounding side, a snap on end cap, and a lug opening or port formed in the end wall. When installed, the lug extends through the lug opening and supports the enclosure while the end wall lies exteriorly of the lug nut and the surrounding side is spaced from the lug nut but generally encompasses and surrounds the lug nut and the lug. Prior to enclosing the enclosure by snapping on the end cap, the enclosure is filled at least partially with a grease or lubricant.

Abstract: A cover for a bolt and an annular nut having a plurality of generally planar, side surfaces. The cover includes: a shell having a closed end portion and a plurality of side surfaces extending downwardly from the closed end portion, an interior portion of said side surfaces being threaded; and a clip for inserting into the aforementioned shell. The clip includes an annular ring and a plurality of spaced projections extending downwardly from the ring, each projection having exterior threads for engaging with the threaded interior of the shell. Preferably, interior portions of each downward clip projection has a substantially planar surface for engaging with the sides of a lug nut over which this cover is installed.

Abstract: The invention is a plastic safety cover for covering bolts and similar hardware items that may extend from construction projects such as building scaffolding. The invention is designed to be used to cover bolts etc. that extend outward from scaffolding found on construction sites urban areas. The cover may use commercially sold plastic caps that are typically in use on many items sold in retail. The cover should have a series of weep holes in order to permit drainage of water from the cover and should have an aperture cut in the top wall in order to accommodate the bolt that may protrude through the upper wall.

Abstract: The invention is a locking device for securing outboard motors and stern drives against theft. The invention attaches to the normal mounting bolts of a stern drive or outboard motor. The lock of the invention consists of two, one inch diameter, 304 work-hardened stainless steel lock nuts, one with a through hole and the other with a blind hole. A work hardened stainless steel pin and a work hardened stainless steel sleeve and two tempered steel roll pins make up the lock.

Abstract: The present invention 10 discloses a wheel cover locking device which includes a flexible cable 18 having one end attached to the wheel cover 12 of a car 14 and the other end of the cable 18 attached to and around the wheel lug 24 of the wheel 30 of the car 14. The end of the cable which is attached to the wheel lug 24 includes an annular fitting 20 for being bolted onto the lug bolt 24 by the lug nut 22. The other end of the cable 18 passes through and is attached to the wheel cover 12 by means 16 which secure it to the hubcap. This prevents the wheel cover 12 from being removed from the car 14 without totally destroying the wheel cover 12 or, at the minimum, making a large and noticeable hole in the wheel cover 12 which would detract from its street value and thereby discourage theft of the wheel cover 12.

Abstract: After a bolt (3) and a double-structured nut (6) are fastened to each other, it is not possible to unfasten the bolt (3) and nut (6), because a predetermined part of the nut (6) is designed to break when subjected to a predetermined torque necessary for fastening the nut (6), and thereby permitting the remaining part of the nut (6) to remain fastened securely to the bolt (3) after the fastening operation of the bolt (3) and nut (6) is performed. The nut (6) double-structure including a cylindrical cover member (7) may alternatively be utilized for a similar double-structured bolt head (42) having a protective cover (43).

Abstract: A pliable flat disk of laminated construction having a thin top layer of deformable material bonded to a relatively thicker intermediate layer of pliable adhesive sealant material and a removable bottom layer of release paper covering the exposed surface of the sealant material is deformed during installation to cover and seal the head of a fastener protruding from a surface. The disk is installed and deformed by a tool having an end with a recess slightly deeper than the height of the head of the fastener and an interior slightly larger than the outer periphery of the head of the fastener. The release paper is removed to expose the adhesive sealant material and the flat disk is generally centered and stuck, adhesive side down, onto the fastener head.

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

Abstract: A valve stem cap for pneumatic tires which has a lock mechanism to prevent theft and unauthorized tampering with the valve. The valve stem cap comprises an inner core with a first end adapted for threaded engagement with the valve stem of a pneumatic tire. An outer sleeve is rotatably mounted about the inner core. Annular flanges at either end of the device are positioned such that the inner core and outer sleeve are locked together. The second end of the inner core forms a solid surface which is provided with keyways for engaging a matched key. By rotating the key, the inner core is rotated, which, in turn, causes the threads of the inner core to be rotated into or out of engagement with the valve stem.

Abstract: Disclosed are threaded seal caps suitable for sealing the ends of common screw and bolt connectors for various purposes including protective/safety, ornamentation and pressure seals in chemical and physical processes or as a guard for a switch. The seal caps include a threaded inside surface for attachment to washers having a threaded outside surface. The caps can include an o-ring gasket for sealing a pressurized connector. The washers are preferably made from a suitable section of all-thread.

Abstract: A device for preventing access to a nut or bolt fastening a valuable item such as an outboard motor on a boat, a riding lawnmower to a burglar cable, or the like. The device is independent of the nut and bolt, and includes a body that receives the bolt head or nut in a chamber, with the shaft protruding to the exterior where it is threadedly fastened to the valuable item. At a second aperture the chamber receives a flanged plug that prevents access to the head of the bolt. A locking pin threadedly engaged through a third aperture in the body engages an annular indented region on the plug to prevent its removal. A unique head on the locking pin is matched with the same style key to thread and unthread the locking pin from the body. An optional slotted chamber design permits securing of a cable to the nut and bolt combination by including a slot in the body that is occluded by the plug when it is inserted into the chamber and locked by the locking pin.

Abstract: A theft prevention device is provided for an anhydrous ammonia tank having a feed pipe with an open end. The theft prevention device includes a plug body which is inserted into the open end of the feed pipe. The plug body includes a flexible member which can be expanded by a keyed lock actuator so as to engage the interior of the feed pipe and prevent removal of the plug member. Locking and unlocking of the plug member to the interior of the feed pipe can be accomplished only by use of a key having a predetermined configuration which fits the keyed lock actuator.

Abstract: A fastener comprising an elongated body having a longitudinal axis and an outer surface and first and second ends, a seating configuration on the first end, a ridge extending circumferentially about the body adjacent to the seating configuration, a plurality of splines on the outer surface extending from the second end toward the first end and terminating at the ridge, and grooves between the splines extending from the second end toward the first end and through the ridge.

Abstract: A multi-tier security fastener in the nature of a nut or bolt having a body with a first tier having a lobed drive surface, and second and third cylindrical tiers on opposite sides of the first tier, with all three tiers having different effective diameters. The second and third cylindrical tiers can have irregularities in the nature of a lobe or a depression.

Abstract: An antitheft device includes a base member having an open top and a hole defined through the bottom thereof, a plurality of slots defined in the peripheral wall extending from the bottom and an annular flange extending radially and outwardly from the peripheral wall. A cap has an annular groove is defined in the inner periphery of the peripheral wall extending from the top so that the head portion of a bolt or a nut is received between the cap and the base member with the annular flange being engaged with the annular groove.

Abstract: A security system, which prevents unauthorized access to an adjusting or function element of a fuel supply pump. To that end, the security device comprises a base part, having a bottom by way of which the base part is screwed to a housing wall of the fuel supply pump, and a cap part which is placed, surrounding the function element, on the base part in such a way that the cap part has a side wall that is surrounded with positive complementary engagement by a side wall of the base part. This prevents access to the function element and to the fastening of the base part. The cap part is secured to the base part by connections that are secured against access.

Abstract: A spare tire carrier lock including a split body collectively formed of at least two body sections, wherein the exterior shape of the split body is complementary to the shape of a predetermined socket of a hoist shaft of a hoist assembly for a spare tire carrier so as to be drivably received into the socket. The body sections are resiliently conjoined to form the split body via at least one, preferably two, resilient members. The split body has a first end at which a tapered seat is formed. A body shaft runs from the seat to a second end of the split body. A tapered armature is shaped to be seatably received by the seat and is provided with a threaded bore for being aligned with the body shaft. A head is located at the second end of the split body having a diameter which prevents its being received into the socket. A head shaft is provided in the head for being aligned with the body shaft, wherein opposite the split body, the head shaft is enlarged to form a recess.

Abstract: An installation kit for installing an absorption device on a piece of equipment and then rendering the device tamper-proof with respect to the damping setting thereof, including an absorption device having an adjustment member for adjusting the damping setting thereof, and locking mechanism for locking the adjustment member after the damping setting has been set to a desired level. The kit also includes an obstruction element to be applied to the locking mechanism for prohibiting access to the locking mechanism. The obstruction element is a mass of deformable material disposed on a sheet material that facilitates alignment of the mass of deformable material with the locking mechanism during transfer of the mass of deformable material into the locking mechanism. The invention also relates to a method of adjusting the damping setting of an absorption device and then rendering the device tamper-proof with respect to the damping setting thereof.

Abstract: The invention relates to a locking device for bicycles having a nut which can be screwed on a threaded stud on the bicycle, a lock section and a cap, the base of which, with the nut on its thread, is between the nut on its thread, is between the nut and the frame or saddle post, its cylindrical wall surrounds the nut and ends in the region of the face of the nut and, when tightened, can rotate freely, where the surfaces of the nuts of several bicycles differ from one another and the part of the lock section of a bicycle accepting the nuts matches certain nuts on that bicycle. The lock section takes the form of a unique lock (2), the outside surfaces of the nuts (1) differ, and the cap (3) is at a short distance from the part of the nut (1) which projects furthest radially outwards. The locking device provides security against the theft of bicycles and their components.

Abstract: 216-type screws and KS-type screws are two types of fastening devices typically used to restrict access to the chambers of building entrance protector (BEP) enclosures used in telecommunications applications. Access to such chambers is limited to those users who have special tools designed for one or the other type of screw. The present invention is a screw that can be actuated using either the special tools designed for 216-type screws or the special tools designed for KS-type screws. In particular, screws of the present invention have a hexagon-shaped outer surface like a 216-type screw and a hexagon shaped recess with a cylindrical upstanding post in the middle of the recess like a KS-type screw.

Abstract: A security arrangement for preventing removal of a bolt or nut threaded fastener including a shielding sleeve receiving the fastener hex portion, the threaded body passing out through a hole in a closed end in the sleeve. A socket wrench can be received in the open end and engage the hex element for wrenching. A blocking cap is received over the open end and a locking pin driven through a hole in one side of the cap, a pair of aligned holes in the sleeve end, and a blind hole extending partially into the inside of the opposite side of the blocking cap.

Abstract: A theft prevention system is disclosed wherein modified screw heads can be removed by only a specially configured tool. The screw heads have a central polygon groove with at least two grooves projecting outward from the polygon. The screw removal tool is adapted to mate with the polygon groove and the projecting grooves to accomplish removal and tightening of the screw.

Abstract: A device for locking bicycle components to the bicycle frame comprises a threaded bolt with a corresponding nut having a rotatable casing surrounding the outer surface thereof and a key for engaging the nut. The key and the end face of the nut have at least one spigot and at least one hole such that the spigots of each fit into the holes of the other. When so engaged, the key is capable of turning the nut. The key preferably includes leverage arms for aiding the turning of the nut.

Abstract: A locking cap for deterring unauthorized removal of golf course flags consists of a bolt, the head of which is loosely captured within a protective shell. The bolt head has a socket, shaped to receive a specialized removal tool and this shell has a hole at its top so the socket can be accessed by the tool. The flag is mounted on a tube, terminated at its upper end by a cap with a hole large enough to loosely pass the threaded shank of the bolt. The flag staff or "pin" marking each golf course hole has a threaded hole at the top to receive the bolt shanks. When the shank bottoms in the hole, enough space remains between the bolt head and the shoulder of the pin so that the shell and the end cap are loosely captured, permitting the flag to freely rotate around the pin.

Abstract: A device for restricting access to the head (10) of a fastener (9) has a first part (18) including an attaching flange (26) adapted to be captive between the head (10) and a member 14 in which the shank (12) of the fastener is to be received. The first part (18) has a recess (13) which the head (10) is accommodated and the second part of the device (20) is dimensioned to be slidingly received in the recess to close the recess without engaging the head (10). The first and second parts (18, 20) have formations (30, 38) which cooperate when the second part 20 is sufficiently inserted into the recess (30), to prevent withdrawing of the second part (20) from engagement with the first part (18), whereby to prevent access to the fastener. The first and second parts comprise frustroconical external surfaces (22, 24), which in use taper in a direction away from the member (14) to which the device is to be secured in use.

Abstract: A vehicle lug nut cover for covering, protecting and providing an ornamental decoration to a wheel lug nut of a vehicle. The nut cover has a shell with a closed portion and a plurality of sidewalls extending downwardly from the closed portion. The sidewalls define a generally hollow cavity and terminate in an outward extending flange rim adapted for adjoining a flat surface of a wheel rim when the lug nut cover is installed over a bolt and lug nut for mounting the wheel rim on a vehicle. The lug nut cover further comprises three leaf-springs for inserting into the hollow cavity of the shell. Each leaf-spring is adapted for engaging a side face of the wheel lug nut over which the lug nut cover is installed. The lug nut cover further comprises retaining members for retaining the three leaf-springs in its hollow cavity.

Abstract: A theft deterrent arrangement for a passenger side air bag assembly includes hollow bolt shield cylinders surrounding mounting bolts holding the air bag assembly to a fixed cross member, a locking cylinder locked in place to prevent access to the bolt head. Removal of the locking cylinder with a key allows removal of the bolts and air bag by use of a socket wrench.

Abstract: A locking system for a vehicle wheel has a threaded member having a threaded part which has an axis and is screwable in a corresponding counter part, and a plurality of rings which are freely rotatable relative to the threaded part and having different eccentricities, and a key having an axis and a part engageable with the threaded member and is provided with a plurality of formations which engage the rings of the threaded member and have eccentricities similar to the eccentricities of the rings.

Abstract: A cylindrical lug nut is formed with a threaded axially inwardly opening bore and a concentric chamfer for abutting the chamfer and the lug nut bore of a wheel and an axially outwardly opening lug socket for complemental receipt of a square drive lug for driving of the lug nut. An adapter may be provided which includes on one end a square lug and on the other end axially stacked bosses having, respectively, a large hexagonal cross section for receipt in a large hexagonal socket of one conventional tire wrench and a smaller hexagonal socket of a second tire wrench.

Abstract: A cable lock attachment for portable articles that is protected from tampering, whether by twisting or otherwise, when the associated cable lock is operational. The attachment comprises a shell with concentric axial ports, one large and one small, and opposed lateral ports. The small port is in proximity to a threaded socket in the article. A collar having a wide head and narrow stem fits through the large port and the stem fits into the small port with the head remaining inside the shell and the stem abutting the article. The stem is secured to the article by a screw that has an internal hex head. The stem is slightly longer than the thickness of the shell so that the shell is free to swivel about the stem when secured. The cable extends through the lateral ports, preventing access to the screw when the cable lock is secured.

Abstract: A fastener including a fastener body having a drive configuration thereon, and a separate security cap mounted on the drive configuration by an interconnecting structure which can be a snap ring or a flexible spring ring. A security cap which is mountable on a drive configuration of a fastener including a body, a socket in the body, and an interconnecting member such as a snap ring or a spring ring mounted in a groove in the wall of the socket.

Abstract: A non-removable screw nut fastener assembly for affixation to a threaded bolt member comprising a nut member with a round substantially smooth exterior surface having a peripheral snap ring groove, a cap member having one closed end and an interior surface having a peripheral snap ring groove, the cap member being of such size as to fit closely but loosely over the nut member when the nut is fastened to the bolt member substantially enclosing and prevent turning of the nut and a snap ring resting untensioned partly within each of the peripheral grooves to prevent removal of the cap member.

Abstract: A fastener including a body, a shroud rotatably mounted on the body, and a resilient retaining ring located in opposed grooves between the shroud and the body, one end of the body extending outwardly beyond the shroud, and a frustoconical outer surface on the shroud which has its larger side proximate the end of the body which extends beyond the shroud.