Abstract: The quick-connect device for the assembly of first and second fluidic transport elements includes a female connector and a male lock-ring connector configured to cooperate with the female connector and to relatively immobilize axially and in rotation the first element with the female connector. The male connector and the female connector respectively include first and second complementary positioning members configured to define a plurality of predefined discrete positions of assembly of the two male and female connectors, distributed angularly around the main axis, such that in any one of these angular positions, the two connectors are immobilized in rotation relative to one another.

Abstract: A headset for a hydration system is disclosed. The headset includes a fluid conduit adapted to connect to a distal end of a hydration system supply tube, and a magnetic quick connect having an upstream and a downstream coupling member. The upstream and downstream coupling members have a common mating axis and together define a portion of the fluid conduit. The upstream member also includes an off-axis arm that may be rotated about the mating axis without decoupling the coupling members. A headgear mount for use in headsets for hydration systems, such as the disclosed headset, is also provided.

Abstract: A tool to remove portions of casing from a wellbore. A tool may include a bottom sub-assembly and casing that selectively detach from a sub-assembly. This may allow for tools and casing within the wellbore to be efficiently and effectively removed from the wellbore without having to cut tools down well.

Abstract: A magnetic quick connect for a fluid delivery system includes a male coupling member and a female coupling member. The male coupling member defines a first outer fluid communication path and includes a first magnetic material. A first inner member is disposed within the first outer fluid communication path and defines a first inner communication path. The female coupling member defines a second outer fluid communication path and includes a second magnetic material. A second inner member is disposed within the second outer fluid communication path and defines a second inner communication path. The male and female coupling members are detachably held together by an attractive force between the first and second magnetic materials such that the first and second outer communication paths are held in fluid communication, and the first and second inner communication paths are held in fluid communication.

Abstract: Provided is a fuel distribution device 1 including a fuel distribution pipe 3, a fuel pipe 4, and a connecting member 5. The fuel distribution pipe 3 has a seat section 21 having a first convex curved surface 24 formed on an outer circumferential surface thereof. The fuel pipe 4 has a seal section 27 having a second concave curved surface 28 formed on an inner circumferential surface thereof, and a second convex curved surface 29 corresponding to the second concave curved surface 28 is formed on an outer circumferential surface thereof. The connecting member 5 presses the seal section 27 against the seat section 21 from an opposite side of the fuel distribution pipe 3. A radius of curvature SR2 of the second concave curved surface 28 is greater than a radius of curvature SR1 of the first convex curved surface 24.

Abstract: Systems and methods are directed to aligning two subsequent pieces of equipment prior to disposing the pieces of equipment downhole. A method comprises providing the first tool piece to be disposed in a wellbore, wherein the first tool piece comprises: a first thread, wherein the first thread is disposed at a first end of the first tool piece; and a second thread, wherein the second thread is disposed at the first end of the first tool piece. The method further comprises disposing an alignment ring on the first tool piece, and coupling the first end of the first tool piece to a second end of the second tool piece. The method further comprises decoupling the first tool piece from the second tool piece; rotating the alignment ring; and coupling the first tool piece to the second tool piece after rotating the alignment ring to produce the tubular assembly.

Abstract: Disclosed is a structure for preventing a leak at a synthetic resin tube joint, which includes a synthetic resin tube including a tapered portion at an end portion; a ferrule inserted into the end portion of the synthetic resin tube and including a tapered portion corresponding to the tapered portion of the synthetic resin tube; a fitting which accommodates the synthetic resin tube and the ferrule, and includes a tapered portion corresponding to the tapered portion of the synthetic resin tube and a protrusion formed on the tapered portion of the fitting, and a nut which engages with the fitting.

Abstract: Embodiments of the invention(s) described herein enable the display of information (e.g., information related to aiming and/or target selection and/or other information) through the use of a rifle scope display adapter (RDA) that can be coupled to and/or placed in proximity to an existing rifle scope. This information, which is viewable through the eyepiece of the rifle scope, can come from a spotter and/or other information source. The RDA may utilize a polarized transmissive-reflective optical element to enable light generated by the RDA to be reflected into the objective of the rifle scope, as well as light from a scene viewable by the rifle scope to be transmitted through the polarized transmissive-reflective optical element to the objective.

Abstract: A movement-constraining assembly for a fluid-conveying system comprises a tubular body adapted to be secured to a component coupling end of a component of the fluid-conveying system. A fluid-conveying tube has a tube coupling end adapted to be connected to the component of the fluid-conveying system and defining an inner passage for fluid to pass therethrough to or from the component, the tube having an interface at the tube coupling end. A blocking nut has an inner surface complementary to at least a surface of the interface of the tube to block rotation between the tube and the blocking nut, the blocking nut further comprising an outer surface complementary to a surface of the tubular body to block rotation between the blocking nut and the component, whereby the blocking nut blocks a rotation between the fluid-conveying tube and the component coupling end.

Abstract: A quick connect tool collar including a multipart collar body. A rib extending radially inwardly from the collar body and one or more recesses in the collar body at an inside dimension surface thereof. One or more profiles at an outside dimension surface of the collar body.

Abstract: The present invention concerns a washer for an aircraft pipe joint. More particularly, but not exclusively, this invention concerns an aircraft pipe joint comprising a locking washer. An aircraft pipe coupling comprises a first pipe end and a second pipe end, and a locking washer disposed between the first pipe end and second pipe end. The locking washer comprising a first tab in engagement with the first pipe end, and a second tab in engagement with the second pipe end.

Abstract: The invention relates to a nut (1) for arrangement on a hose connector, including a connecting device (2) which is connectable in a fluid-tight manner to a hose connection part (13), and a receiving means (3) for the hose connector (7), having a first end (3a) and a second end (3b), wherein the receiving means (3) is realized for the purpose of encompassing the hose connector (7) in a form-fitting manner in the circumferential direction in such a manner that the nut (1) and the hose connector (7) are rotatable in relation to one another in the circumferential direction; wherein the nut (1) comprises anti-rotation protection (4) which is realized such that, as a result of a structural element (16) of the hose connection part (13), it is transferable from an open position, in which the nut (1) and the hose connector (7) are rotatable in relation to one another in the circumferential direction when the nut is arranged on the hose connector, into a closed position in which rotating of the nut (1) in the circumfer

Abstract: An improved fluid conduit union and method for hammerless attachment apparatus for hammerless coupling the ends of abutting fluid conduits, such as pipe, hoses, or attachment fitting conduits, comprising a ring-shaped conduit receptacle assembly threadedly engaged and fixed on a female fitting at one conduit end and a cylindrical ring-shaped locking assembly positioned around a male fitting at the other conduit end. The ring-shaped locking assembly has a lock ring positionable by a rotatable locking ring nut threadedly engaging the ring-shaped conduit receptacle. Rotation of the locking ring nut translates the lock ring against the male fitting and firmly seats the male fitting at one conduit end to the female fitting at the other conduit end where they are locked in place, all without rotation of either fluid conduit.

Abstract: A pipe joint structure includes a connection head, an internal loop and a lock nut. One end of the connection head is disposed with a connection nut adapted to be in connection with other outside device, and another end thereof is disposed with a thread portion and an engagement portion adapted to insert in the tube, allowing the connection head to be coupled to the pipe. The internal loop and the lock nut are respectively engaged with the outer part of the pipe, where the internal loop can be fixed on the outer parts of the pipe and an insertion end of the engagement portion of the connection head, and the lock nut can be engaged with the thread portion of the connection head and covers the outer part of the internal loop fixedly as well. The locking can be carried out by using any tool (e.g. wrench) through the lock nut.

Abstract: A conduit coupling construction including a coupling body threadably mounting a pair of lock nuts on its ends. Conduit ends are passed through the lock nuts and into the coupling body. Each lock nut receives a respective lock ring adapted for compression onto a respective conduit. The lock ring transforms an axial force on the conduit to a shear force to enhance gripping for pull-out resistance. The central body portion is transparent and allows an end of a conduit to pass completely through the body for more convenient installation onto two separated pieces of conduit, thereby joining them. This construction allows the coupler to be slipped over a first conduit section, aligned with a second conduit section, and the two sections joined without the need to bend either conduit.

Abstract: Apparatus and methods for increasing the torque capacity of connections between tubular members. In some embodiments, the connection is threaded. The apparatus may include a first tubular end having a torque member moveable thereon. A second tubular end is made up with the first tubular end. The torque member is moveable back toward the second tubular end. The torque member can be moved into engagement with the second tubular end, and then torqued against the second tubular end. A first torquing interface is provided between the first tubular and the second tubular by making up their respective ends, and a second torquing interface is provided therebetween by torquing the torque member against the second tubular end. A torque capacity of the made up connection is increased thereby.

Abstract: An exemplary connector assembly includes an elongated body with an internal passage for a conduit or cables. A body aperture region with a body fastener aperture is set between two elongated slots. The body aperture region may radially bulge out from the body, and may alternatively or additionally include an aperture flange protruding from the body aperture region. A U-shaped connector clip includes two parallel teeth that are inserted in the two slots, and a clip body having a clip fastener aperture. A fastener is inserted through the fastener apertures, securing the connector clip to the body. A fastening clip secures the fastener to the connector clip and keeps the connector clip from falling back into the slots as the connector clip is being disengaged from the body. Each clip tooth includes an engaging end that is complementarily interfittable with grooves in the conduit, keeping the conduit in place.

Abstract: A ferrule for use with a nut with an internal locking mechanism includes a first tubular portion with a first end and a first outer diameter for connecting to a first object; a second tubular portion with a second end and a second outer diameter for connecting to a second object; a transition portion connecting the first tubular portion and the second tubular portion; and a plurality of pockets spaced circumferentially around the second portion to engage the internal locking mechanism of the nut.

Abstract: A fitting for use with a nut with an internal locking mechanism includes a first tubular portion with a first end and a first outer diameter for connecting to a first object; a second tubular portion with a second end and a second outer diameter for connecting to a second object; a transition portion connecting the first tubular portion and the second tubular portion for fluid communication between the first tubular portion and the second tubular portion; and a plurality of pockets spaced circumferentially around the second tubular portion to engage the internal locking mechanism of the nut.

Abstract: A fitting is provided that may optionally be pulled up to its final assembled condition by torque rather than by turns. At least one fitting component includes a structure that facilitates pull up by torque. In one embodiment, a ring is provided that may be disposed on one of the fitting components and includes an engagement surface that engages a surface on the other of the fitting components at a first axial position that corresponds to a complete pull up. The engaging surfaces increase the torque required to continue pulling up the fitting past the first axial position.

Abstract: A loose anti-rotation lock sleeve design for use in a flange and pipe assembly. The design includes a lock sleeve positioned between a pipe and a flange to prevent rotation of the pipe relative to the flange. The lock sleeve includes at least two openings in a first end of the lock sleeve configured to receive at least two pipe pins extending radially outward from the pipe. The lock sleeve further includes at least four openings in a second end of the lock sleeve configured to receive at least four flange pins extending radially inward from the flange.

Abstract: A locking device for locking a threaded pipe connection where two threaded connection units are screwed together. The locking device includes two locking rings which engage each other with corresponding teeth and notches on their first sides. Each of the two rings has a different number of teeth and notches on their second side. The two second sides, which face the connection units, are formed to engage a corresponding number of notches and teeth formed on the shoulder of the connection unit's opposite side, after the rings have been spread apart in an axial direction, while maintaining the engagement between the first and the second ring.

Abstract: An improved seal and method for providing a watertight compression joint connection between a valve or fitting and a flare end of a copper tubing in a water service. The improvement includes an O-ring seal on a bull nose end of a valve and a frictional material inserted into straight AWWA threads on a male inlet or outlet of the valve to sealingly engage a flared end of the copper tubing to the bull nose end and to frictionally engage a flare nut with the tubing back onto the matching bull nose end of the valve when screwing the flare nut onto the male threads of the valve, respectively.

Abstract: A fitting for a liquidtight conduit that includes a compression ring, a ground cone and a locknut. The compression ring has a first end that is adapted to receive a liquidtight conduit and a second end that has a perimetrical lip that extends radially from the exterior surface and a collar that extends from the second end. The locknut is ring-shaped and has an aperture in the middle. The ground cone has a flanged end and a plain end. The locknut passes over the plain end and is attached to the back side of the flanged end. When the fitting is installed, the plain end of the ground cone passes through an aperture in a wall and the second end of the compression ring. A plurality of threads on the exterior surface of the ground cone engages the interior surface of the liquidtight conduit in the compression ring and, when the ground cone is rotated, the threads move the conduit towards wall.

Abstract: A fast-fit coupling for a fluid circulation system comprising at least two conveying members of a fluid. The coupling comprises: a receiving body for each conveying member; way for fastening carried by the body, shiftable by the conveying member during the insertion of the conveying member, and integral with the conveying member when the conveying member is moved in a disconnection direction from the body; way for locking cooperating with the way for fastening to lock the conveying member in a position inside the body and to prevent the body itself from being disconnected; and way for releasable constraint, activatable for restraining the way for locking to the body and preventing the conveying member to be disconnected, and deactivatable to disconnect the way for locking and allowing the conveying member to be disconnected; the way for locking and the body are engageable/disengageable by ways of a relative rotation less than ninety degrees.

Abstract: A male coupling is connectable to and separable from a female threaded coupling. The female threaded coupling includes a sealing surface and a receiving portion sized to receive at least a portion of the male coupling, where the receiving portion has internal threads provided therein. The male coupling includes a body having a passageway extending therethrough and a locking member disposed about the body and configured to move between locking and releasing positions. The locking member has a retaining formation configured to engage the internal threads of the female threaded coupling when the locking member is in its locking position. After insertion of the male coupling into the female threaded coupling, the retaining formation of the locking member engages one or more of the internal threads in the female threaded coupling when the locking member is in its locking position.

Abstract: Methods and Apparatuses for Generating a Seal Between a Conduit and a Reservoir Well. According to one embodiment, an apparatus is provided for generating a seal between a conduit and a reservoir well. The apparatus can include a mount including a first and second end. The mount can also include a first aperture extending between the first and second ends. The apparatus can also include a tube including a first end engaging the first end of the mount, and operable to hold a conduit having an end such that the conduit extends through the first aperture of the mount and the end of the conduit communicates with a reservoir well. Further, the apparatus can include a nut operable to engage the mount and tube and seal the conduit to the first aperture of the mount such that air cannot communicate from the reservoir well through the first aperture of the mount.

Abstract: A pipe joint 1 comprises a fitting 10 connected with a hose 2, a flange 20 pressingly holding the fitting 10 inserted into a through hole 21 toward a block 3, a bolt 30 for fixing tightly the flange 20 to the block 3, a metal seal 40 having “C” cross section so as to seal a joined portion of a communication passage 11 and a connection opening 3a externally, and a first and a second O-rings 50, 60 so as to seal a contact portion of the fitting 10 and the block 3. A projecting portion 24 is formed on a lower face 23 of the flange 20, the projection portion 24 is formed at an area opposite to an area where the insertion hole 21 is formed with respect to a center axis of the through hole 21, the project portion 24 projects from other portion of the flange towards the block 3. A tip of the fitting 10 inserted into the through hole 21 projects towards the block 3 from the lower face 23 of the flange 20.

Abstract: A high pressure hydraulic fitting (300) includes a body (302) having a central passage (322), a channel (304), a threaded section (314), and an extension section (310), wherein the threaded section (314) is disposed between the channel (304) and the extension section (314), and wherein the central passage (322) fluidly connects a first distal end (303) with a second distal end (316) of the body (302). A first o-ring (306) is in the channel (304). A locking nut (324) is engaged to the body (302). The locking nut (324) has an internal threaded section (326) that is arranged to mate with the threaded section (314) on the body (302).

Abstract: A vending machine and a hose controller system for vending machines wherein the dispenser hose is axially and torsionally controlled to facilitate slight twisting, thereby minimizing applicator tool resistance, and making it easier for users to operate the remote vending tool on the hose distal end. The elongated reinforced applicator hose terminates at the controller, which bridges the hose between the outdoors and the cabinet interior. The controller has an angulated bracket mounted within the vending machine cabinet. A collar assembly secured on the bracket top above a hose feed-through orifice has a terminator, a bushing, and a cooperating yoke that are coaxially secured. The terminator anchors the hose end and is seated within the yoke. A rigid lug projects radially from the yoke. A rigid restrictor surmounts the collar assembly and limits rotation by contact with the lug.

Abstract: A coupling in accordance with the present invention may be used to join devices together without the need for conduits or other intermediaries. A nut may be used to couple the coupling to a first device via a first thread portion and to a second device via a second thread portion. In some embodiments, the coupling may be affixed to one of the first or second devices.

Abstract: A hole seal for an enclosure includes a body having a threaded portion, and a nut having an inner threaded portion to receive the threaded portion of the body, the nut including a first outer flange having first diameter and a second outer flange having a second diameter, larger than the first diameter.

Abstract: A coupling assembly is provided for releasably interconnecting confronting ends of conduit members. The coupling assembly creates a self-locking, and self-bonding connection wherein locking and unlocking is achieved by a predetermined amount of rotation of a lock nut group with respect to a stationary threaded flange. The overall construction of the coupling assembly creates the rigid connection between the conduit members, yet adequate sealing between the conduit members is provided by a single sealing member.

Abstract: A bulkhead assembly for a pipe-in-pipe system includes coxially inner and outer components which are screwed together along a first threaded portion and a locking device which includes a locking element screwed onto a threaded portion on one of the components having threads running opposite to the threads on the first threaded portion. One of the components further includes a radially extending abutment shoulder at an end of the first threaded portion away from the second threaded portion which abuts against the other component.

Abstract: A joint for tubings with which, in tightening the nut member (20), the friction torque applied to the first end face (32) of the control ring (30) by the bore peripheral face (25) of the internally threaded bore (21) of the nut member (20) is greater than the friction torque applied to the second end face (34) of the control ring (30) by the stopper portion (17) of the joint main body (10, and thus the nut member (20) is reliably turned together with the control ring (30) at the final stage of tightening the nut member (200, which allows the proper initial tightening position of the nut member (20) to be determined.

Abstract: An improved hydraulic coupling includes a fitting and a nut that are threadably connectable together. The fitting includes a generally annular groove having a lateral frusto-conic engagement surface. The nut includes a plurality of elongated fingers that each include a projection having an outwardly-disposed edge. When the coupling is assembled, the edges are frictionally engaged with the engagement surface as a result of the elastic deflection of the fingers. The frusto-conic shape of the engagement surface provides progressively greater frictional resistance in a direction of unthreading of the coupling, whereby loosening of the coupling during operation of the fluid circuit is resisted.

Abstract: A method and apparatus are directed to reduce the load from the threads on taps on an orifice plate or orifice fitting. The apparatus includes a tap (3) having an NPT threaded end (1) and a flanged end (12) and an intermediate flange (13) which engages with a stabilizing tube (2) placed around the tap (3). In use, a stabilizing nut (1), previously threaded on the stabilizing tube (2), is unthreaded thereby forcing the stabilizing tube (2) against the intermediate flange (13) and transferring at least some of the weight off the threads (1) of the tap (3).

Abstract: The threaded connection between the pin and the box ends of two pipes is sealed externally and internally to protect the threads in the connection from exposure to corrosive fluids. Seals are provided at each axial end of the threads. The external seals may be formed by metal-to-metal engagement between the pin and box or may be provided by an annular, elastomeric ring engaging the pin and box of the connection. A threaded compression ring may be used to compress the elastomeric seal between the pin and box. The seals protect dynamically loaded threaded connections from fatigue-induced failure in corrosive environments.

Abstract: An externally threaded male hydraulic coupling member adapted for threaded and sealed attachment to a port body with a female port. The male coupling member having a tubular member with a threaded end, a bore extending through the member, a first cylindrical peripheral undercut portion longitudinally adjacent the threaded end, a series of intermediate external threads, and a second cylindrical undercut portion. The coupling member having a seal member and an annular ring member located in peripheral sealing contact with the first undercut portion. Wherein upon attachment, the seal member is encapsulated by the annular ring, the female port and the first undercut portion forming an annular chamber having a longitudinal extent greater than the seal member thickness. The coupling member also having a lock nut threadedly attached to the intermediate threads with a longitudinal end located between the annular ring and the intermediate threads.

Abstract: A manifold joining system is provided that allows for adjustment of the relative lineal and angular position of the manifold while still maintaining a fluid seal at the points of connection. The joining system may include elements for securing the relative lineal and angular position of the manifold upon positioning the connection of the manifold as desired.

Abstract: A quick-coupling union for oil and gas tubular members that provides a more stable joint connection, a redundant seal arrangement, and a method for pressure testing the seals. The union and sealing arrangement includes an elongated tubular receiving member, further including a central longitudinal cavity therein for receiving an elongated tubular insertion member and an external port in communication with the cavity, at least two sealing members located within the cavity defined by the insertion and receiving members and the dual seals being capable of providing a positive seal between the insertion member and the receiving member the union, further including a nut slidable upon the insertion member for threadably locking the insertion member relative to the receiving member, the sealing members being spaced apart in a manner whereby the external port is interposed between the dual sealing members when the union is fully engaged, thus defining a means for applying a pressure there upon.

Abstract: A heavy duty, locked, tubular quick coupling used for coupling oil and gas well tubing or pipe joints, thus allowing long strings of pipe and tube joints subsequently connected to at least one such quick coupled joint to be lifted as a string, thereby applying tensile loading to the quick coupled joints. Both interior and exterior locking arrangements for the locked quick coupling are disclosed which utilize twist-locking elements secured in position by a locking washer and cap nut. Arrangements are also disclosed illustrating how the locking couplings are used for fast setup of wire-line riser strings utilizing multiple specialty subs and valve assemblies.

Abstract: A swivel coupling comprises a male member having an annular groove formed on an outer surface and a female member overlapping the male member to form a central flow passageway. An annular groove is defined at an end of the female member and the annular groove of the female member is positioned adjacent the annular groove of the male member. A locking member is movably mounted around the male and female members and an annular groove on the locking member is positioned adjacent the annular grooves of the male and female members. The grooves together define an annular ball race. A plurality of ball bearings are trapped in the ball race and the male member is rotatable relative to the female member about the ball bearings.

Abstract: A fluid tank valve assembly of the type employed for water tanks for toilets has a tank refill valve located atop a fluid inlet supply tube. The refill valve has a lever that is raised and lowered to open and close the valve. An inverted, cup-shaped hood is positioned atop the valve and a float is located about the skirt of the hood and secured thereto by the force of friction. The float can be moved longitudinally along the skirt of the hood in order to vary the water level at which the hood bears down upon the lever arm or is lifted from the lever arm, thereby varying the water level at which the valve is actuated. The valve itself is equipped with a metering pin that is configured to reduce the likelihood of clogging in the longitudinal passage of the core of the valve diaphragm.

Abstract: A tapered compression ring for flared tube applications includes a generally ring-shaped body having (a) a gap defining a first end and an opposite second end, (b) a first face, (c) an opposite second face, and (d) a central axis. The first face is tapered at the first end, and the body is twisted so that the first end is offset from the second end along the central axis in a direction away from the first face.

Abstract: A ram device has a cylindrical housing (10) in which is arranged a pressure medium actuated impact piston and a control unit for controlling the pressure medium flow into the housing (10) and which housing (10) at its rearward end is provided with a pressure medium connector (16) and is closable by a closure part (12). The closure part (12) is threadable into an end portion (22) of the housing (10) provided with an internal thread by an externally threaded section (18) and has a second threaded section (20) which stands in engagement with a counter element (22) which abuts a housing surface (40) perpendicular to the housing axis.

Abstract: A tapered compression ring for flared tube applications includes a generally ring-shaped body having (a) a gap defining a first end and an opposite second end, (b) a first face, (c) an opposite second face, and (d) a central axis. The first face is tapered at the first end, and the body is twisted so that the first end is offset from the second end along the central axis in a direction away from the first face.

Abstract: A coupling comprising a swivel stake nut or other connecting end portion rotatably coupled to a stem portion, and a jam nut or other stabilizing apparatus mounted upon or otherwise attached to one of said connecting end portion and stem portion in stabilizing relation to the other thereof, for inhibiting axial, rocking and/or rotational movement of the components during pressurized operation of the device with impulse cycling when coupled to hose or other fluid transfer component and an associated equipment port, in the absence of a separate adapter.

Abstract: A heat exchanger, particularly with an integrated oil heat exchanger, has screw-in connectors. Each connector is secured to the exchanger using a retaining ring, which has finger forming projections. The heat exchanger has an annular collar with circumferentially spaced teeth on its inner circle. The fingers engage the teeth. The fingers and the teeth are arranged to prevent the connector from being unintentionally unscrewed or loosened by virtue of the connector being secured by the retaining ring.

Abstract: A nut and bolt securing device is disclosed to prevent loosening of the assembly due to environmental conditions. In a first version of the invention the two piece device is fitted over a nut and a portion of a bolt extending from the nut, the two sections of the device being secured together with set screws, with serrations within the device, and one or more set screws engaging the front end of the device. In a second version of the device a shelf like planar projection on the front end of the device engages a planar surface on a nut, again combining with the serrations within the device to prevent fastener loosening. The device is particularly described in use in conjunction with refrigerant system flare nuts so as to prevent loss of refrigerant at these flare nut unions.