Abstract: A medical connector includes: a first connection section that defines a first passage; a second connection section that defines a second passage communicating with the first passage; and a rotation control section that controls relative rotation of the first and second connection sections. The second connection section includes a first wall face configured to abut on the first connection section to restrict the first connection section from moving in a direction to be separated from the second connection section. In a state in which the first wall face abuts on the first connection section, the rotation control section allows the second connection section to rotate relative to the first connection section in a first circumferential direction about the axis and restricts the second connection section from rotating relative to the first connection section in a second circumferential direction opposite to the first circumferential direction.

Abstract: A tool-less joiner clamp includes a hinged circular body having a forward mating flange and an aft mating flange configured to selectively attach to a forward section flange and an aft section flange of an underwater vehicle, respectively. The forward mating flange has a threaded inner diameter configured to integrate with a threaded outer diameter of the forward section flange, such that rotating the joiner clamp about the forward section flange causes the clamp to move in an axial direction. Also included is a cam lock for selectively closing and tightening the tool-less joiner clamp onto the forward and aft section flanges of the vehicle and may include a quick release mechanism for opening the cam lock. The clamp may also include collapsible handles, and multiple buttons configured to press against a flat surface of the aft mating flange when the joiner clamp is rotated about the forward section flange.

Abstract: A backlash-free plug-in connection for a pipe or hose line includes a threaded-connection body, a union nut, a pipe piece insertable into the threaded-connection body, and a securing ring supported against the pipe piece. Stepped recesses are provided for holding the securing ring. A gasket seals the pipe piece against the threaded-connection body. By pressurizing a medium flowing through the pipe or hose line, the pipe piece moves from an inserted position against an insertion direction to a locked position. A fixing ring abuts the securing ring and the gasket, and is supported between the pipe piece and a contact surface formed on the threaded-connection body or union nut. The contact surface is inclined and the gasket moves the fixing ring to a fixed position when the pipe piece moves to the locked position so that the pipe piece is fixed in place.

Abstract: A nut is employed to fix a faucet on a wash basin or a kitchen basin and contains an external driving member and an internal screwing member. The external driving member includes a cylindrical fence, an accommodating cavity, a first edge, and a second edge; the cylindrical fence has at least one limiting block and a griping face. The internal screwing member is fitted into and retained with the accommodating cavity and includes an annular cliff, a through orifice, a third edge, and a fourth edge; the annular cliff has plural slots longitudinally extending and isometrically arranged to the fourth edge from the third edge so as to define a plurality of flexible retaining portions, each having an inner threaded section; the annular cliff also has at least one longitudinal recess for retaining with the at least one limiting block of the external driving member and has a contacting fringe.

Abstract: Various novel connectors are provided. In one embodiment, the connector includes a collar configured to receive first and second components. In this embodiment, the connector may also include a load ring configured to be received in a groove of the second component and to move into and out of engagement with the collar when the second component is received by the collar. The connector of this illustrative embodiment may also include a cotter configured for installation to the second component and to inhibit disengagement of the load ring from the collar. In some embodiments, engagement of the load ring and the collar effects securing of the first and second components to one another. Other devices, systems, and methods related to connectors are also disclosed.

Abstract: A connector for medical infusion lines, transfusion lines, and the like, includes a tubular body having at one end a male connector including an inner tubular element and an outer hollow element, which is internally threaded and can be coupled by screwing to a complementary female connector. The line connector further includes an outer manoeuvring sleeve coupled in unidirectional rotation to the body in the direction corresponding to screwing of the male connector with respect to the complementary female connector and free to turn in the opposite direction, formed by two parts coupled together on the body of the connector.

Abstract: An end cap for an open end of a hydraulic fitting having a peripheral flange can be provided by a threaded ring and a threaded insert. The threaded insert can be rotatably engaged with the threaded ring to move axially back and forth. The threaded insert has a forward end face which can engage the open end of the hydraulic fitting to close the hydraulic fitting end or to couple with it. The threaded ring includes a locking member to embrace and engage the peripheral flange. The end cap can be used to prevent loss of oil from the hydraulic fitting during service of equipment on which the hydraulic fitting is utilized, and for other purposes.

Abstract: A replacement fitting assembly for a pipe is disclosed including a split connector with a first wall portion having a first externally threaded portion and a first support portion, and a second wall portion having a second externally threaded portion and a second support portion, the first and second outer wall portions being configured to be aligned with one another to form a tubular opening, and a fastener having a side wall defining a central longitudinal opening, the side wall including an internally threaded nut portion configured to engage the first and second externally threaded portions of the connector, and an extension portion adjacent the nut portion, the side wall having a gap configured to permit lateral entry of a pipe into the longitudinal opening. A method of replacing a fitting assembly also is described.

Abstract: A coupler for use in sealing a joint between two pipes. The coupler is comprised primarily of two center sections and two end caps. The two center sections are engagable with one another and the two end caps are engagable with the center sections. Gasket rings create seals between the two center sections as well as between the two center sections and the cap rings. The center sections are dimensioned to create a volume of space within the coupler, thus permitting the coupler to accommodate offset joints. The gasket rings between the cap rings and the center sections can be longitudinally spaced apart, minimizing the angular deflection of the coupler with respect to the pipes when the pipe joint is offset. The center sections and end caps can be lockably engaged.

Abstract: An adaptor for converting to a push-to-connect tube fitting/port a standard tube fitting/port body having a threaded portion for threaded attachment of a nut/plug, comprises a coupling nut/plug having an axially inner threaded end portion for threaded attachment to the threaded portion of the fitting/port body; a tube sealing member contained within the nut/plug for sealing to a tube having a locking surface spaced from the end of the tube; and a retention device retained in the nut/plug, which nut/plug has at an axially outer end thereof a central opening through which the tube can be inserted into the coupling nut/plug, whereby the locking surface can be engaged by the retention device to prevent axial withdrawal of the tube from the coupling nut/plug once inserted; wherein sealing and retention of the tube is effected within the confines of the coupling nut/plug and separate from and without requiring modification of the standard tube fitting/port body.

Abstract: A fluid flow shut-off or control valve or device, for use within the field of irrigation, has at least one end shaped so as to allow coupling of the body with a rotatable ring nut provided with a female thread adapted to be screwed onto a corresponding male thread of a component.

Abstract: An end cap for an open end of a hydraulic fitting having a peripheral flange can be provided by a threaded ring and a threaded insert. The threaded insert can be rotatably engaged with the threaded ring to move axially back and forth. The threaded insert has a forward end face which can engage the open end of the hydraulic fitting to close the hydraulic fitting end or to couple with it. The threaded ring includes a locking member to embrace and engage the peripheral flange. The end cap can be used to prevent loss of oil from the hydraulic fitting during service of equipment on which the hydraulic fitting is utilized, and for other purposes.

Abstract: An adaptor (45) for converting to a push-to-connect tube fitting/port a standard tube fitting/port body (10, 110, 210, 310, 410, 510, 610) having a threaded portion (11) for threaded attachment of a nut/plug (12), comprises a coupling nut/plug (12, 112, 212, 312, 412, 512, 612) having an axially inner threaded end portion for threaded attachment to the threaded portion (11) of the fitting/port body (10); a tube sealing member (15, 115, 215, 315, 415, 515, 615) contained within the nut/plug (12) for sealing to a tube (19) having a locking surface (22) spaced from the end of the tube (19); and a retention device (23) retained in the nut/plug (12), which nut/plug (12) has at an axially outer end thereof a central opening through which the tube (19) can be inserted into the coupling nut/plug (12), whereby the locking surface (22) can be engaged by the retention device (23) to prevent axial withdrawal of the tube (19) from the coupling nut/plug (12) once inserted; wherein sealing and retention of the tube (19) is

Abstract: A field replaceable wing nut having an arcuate body and an arcuate insert is disclosed. The wing nut is designed to replace an existing wing nut which has deformed or non-useable lugs on a hammer union connection. The wing nut has accurate alignment of the mounting threads using an alignment attachment device. Replacing the wing nut in the field does not require any special equipment or training. Each wing nut is designed for a particular pipe diameter.

Abstract: A fitting for use with corrugated tubing, the fitting comprising: a nut having a passage therethrough for receiving the tubing, the tubing being corrugated tubing having a series of peaks and valleys; a plurality of retainers positioned forward of the nut, the retainers having a sealing surface for placement in a valley of the corrugated tubing; a body having an annular pocket formed circumferentially around the retainers, the body having a body sealing surface, wherein upon sealing, the tubing is compressed between the sealing surface and the body sealing surface; a spring positioned within a cavity in the retainers, the spring driving the retainers into the pocket when the fitting is not sealed.

Abstract: A swivel coupling for electrical conduit is formed of a pair of arcuate tubular sections joined together at a pair of connecting flanges. A liquid tight seal is provided by an O-ring which seats in registered annular grooves in the face of each flange. A coupling nut tightens the flanges against one another. Formed at the end of one of the sections is a junction box fitting including a threaded nipple which is inserted through an opening of the junction box until a stop nut, positioned on the nipple, engages the box. A tightening nut is engaged over the nipple from the interior of the junction box to secure the swivel coupling to the box. The end of the other tubular section includes a conduit fitting for securing a length of electrical conduit. Because the stop nut is installed after the coupling nut has been advanced past the nipple, a reduced diameter coupling nut may be employed.

Abstract: In a liquid filter of the reverse-flow flush-cleaning type, the present invention provides the improvement of mounting the pack of discs (170) intermediate to an assembly including a seat member (200) and screw-thread split-ring (202).

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 quick connect and disconnect pipe coupling and seal assembly including a first generally cylindrical coupling head having a bore therein for connection to a first conduit and a raised annular ring, a second generally cylindrical coupling head having a bore therein for connection to a second conduit, external male threads, and an annular recess for receiving an o-ring, and a generally cylindrical coupling ring for holding the first coupling head therein, the coupling ring having a threaded bore for receipt of the external male threads of the second coupling head to connect the first coupling head to the second coupling head and to force the o-ring received in the annular recess of the second coupling head into contact with the annular ring on the first coupling head to form a high pressure seal between the first coupling head and the second coupling head.

Abstract: Union nut (10) includes body (20) and lock member (50). Body (20) includes thread retaining end (30) with threads (33) for mounting upon a threaded pipe (120) and flange retaining end (40) including partial collar (41) for partially retaining a flanged pipe (140). Lock member (50) slidably engages with body (20) to fully retain and support pipe flange (143).

Abstract: Union nut (10) includes body (20) and lock member (50). Body (20) includes thread retaining end (30) with threads (33) for mounting upon a threaded pipe (120) and flange retaining end (40) including partial collar (41) for partially retaining a flanged pipe (140). Lock member (50) slidably engages with body (20) to fully retain and support pipe flange (143).

Abstract: A device for leaktight coupling of a tube to a tubular nose, the tube being provided with an outwardly-directed bead at a distance from its end, the tubular nose presenting an outside thread and including an inlet bore for defining a housing for an annular gasket and an annular gasket-retaining insert, the device including a nut having the tube passing therethrough and presenting an end inside thread for co-operating with the thread of the tubular nose and including a chamber behind the thread, the chamber terminating by a drive wall, and an axial drive collar removably placed between one of the flanks of the bead and the drive wall, the collar extending axially towards the end of the tube beyond the bead in the chamber to co-operate with the insert, slidable in its housing and shaped as a pusher for compressing the gasket between the bore and the tub.

Abstract: A fully formed flared portion is molded as part of the main body of the one embodiment of the fitting. The flared portion is inserted through the back side of a retaining cap. A collet assembly is assembled together around the smallest diameter of the tube fitting below the flare. The collet assembly is fitted into the top of a mating nut. The retaining cap is then snapped onto the top of the nut, completing the assembly.

Abstract: A quick connect and disconnect pipe coupling and seal assembly including a first generally cylindrical coupling head having a bore therein for connection to a first conduit and a raised annular ring, a second generally cylindrical coupling head having a bore therein for connection to a second conduit, external male threads, and an annular recess for receiving an O-ring, and a generally cylindrical coupling ring for holding the first coupling head therein, the coupling ring having a threaded bore for receipt of the external male threads of the second coupling head to connect the first coupling head to the second coupling head and to force the O-ring received in the annular recess of the second coupling head into contact with the annular ring on the first coupling head to form a high pressure seal between the first coupling head and the second coupling head.

Abstract: In the field of oil drilling and other well operations there is a need for a coiled tubing connector that is quick and simple to use. There is also a need for a coiled tubing connector that is reusable. A coiled tubing connector (50) comprises a first sub (20); at least one arcuate segment (31, 32) and a second sub (40). The first sub (20) is slidable on the exterior surface of a length of unwound coiled tubing (10); and includes an internal recessed portion (21) and an engagement portion (22) adjacent to a first end thereof (26). At least one arcuate segment (31, 32) defines a protuberance (33) extending radially from an inner surface thereof. Each protuberance (33) is engagable with a corresponding circumferentially extending recess (11) in the coiled tubing (10). The second sub (40) is slidable on the exterior surface of the coiled tubing (10); and includes an engagement portion (41) adjacent to a first end thereof (42).

Abstract: A fluid-tight union for reversably interconnecting lengths of coaxial pipe includes: a first annular fitting, having a circumferential flange, attachable to a connection end of a first length of pipe; a second annular fitting, having a circumferential shoulder, attachable to a connection end of a second length of pipe; a clamping collar comprised of arcuate segments which incorporate both an inwardly-angled clamping ledge that engages an overhanging step on the circumferential shoulder of the second annular fitting and at least one internal, inwardly-angled, spiral, circumferential thread spaced apart from the clamping ledge; and a retainer ring sized so as to be slidable over the first annular fitting, and rotatable against the rear face of the circumferential flange, the retainer ring incorporating external, spiral, circumferential threads that are angled away from the flange, the external threads of the retainer ring engaging the internal threads of the clamping collar to draw the clamping ledge and engage

Abstract: A submersible well pump assembly using threaded connections, the submersible well pump assembly having a first housing, a second housing, a clamp ring, and at least one anti-rotation member. The first housing has an end having an outer surface, an end face, and a shoulder on that outer surface. The second housing has an end having an outer surface and an end face. The outer surface of the second housing has external threads formed thereon and the end face of the second housing abuts the end face of the first housing. The clamp ring is rotatably and slidably carried on the first housing and has internal threads that engage the external threads of the second housing. The clamp ring also has an internal shoulder that engages the shoulder of the first housing. To keep the connection secure, the assembly has at least one anti-rotation member having a cooperative element on each end of each housing to inhibit rotation of one housing relative to the other.

Abstract: The invention provides means for connecting a pipe to a tubular body having an end arranged to receive an end of the pipe. The connection means comprise a sleeve subdivided into first and second portions in axial succession that are provided with means for connecting said portions in leakproof and releasable manner respectively to the end of the tubular body and to the pipe. The means also comprise a removable abutment ring provided with means for locking it axially on the pipe set back from the end thereof to constitute an abutment shoulder on engagement of the pipe in the tubular body and an axial abutment shoulder between the second portion of the sleeve and the pipe.

Abstract: A fully formed flared portion is molded as part of the main body of the one embodiment of the fitting. The flared portion is inserted through the back side of a retaining cap. A collet assembly is assembled together around the smallest diameter of the tube fitting below the flare. The collet assembly is fitted into the top of a mating nut. The retaining cap is then snapped onto the top of the nut, completing the assembly.

Abstract: A split nut assembly (100) for joining a threaded pipe (90) with a flanged pipe (95), the split nut assembly having a two-piece split nut (110, 130) having locking pins (113, 133) that engage locking apertures (115, 135) to properly align the split nut. A locking ring (150) slidably engages the properly aligned split nut to hold the assembly together. Rectangular apertures (123, 143) are provided on the split nut, that engage corresponding channels (163) in the locking ring, whereby the locking ring is rotationally coupled to the split nut when assembled. Locking tabs (164) hold the locking ring in place after assembly. This split nut assembly allows the pipes to be joined without threading any hardware along the length of either pipe, and with the split nut threads (112, 132) engaging the pipe threads (92) without having to rotate the nut.

Abstract: A quick connector (10,12) is to facilitate the connecting of the connecting end of coiled tubing and the connecting end of a tool. For this purpose, the connector comprises two connectable and lockable main parts (10 and 12) formed to be screwed to the end of coiled tubing and the tool, respectively, when the main parts (10 and 12) are in separate positions. A first main part (10) has a freely ending pin element (16) conically narrowing towards said free end, with elongate, axially directed, circumferentially distributed ridges (20) with intermediate grooves (18). A second main part (12) has a pin-element-accommodating bore (22) of complementarily conical shape, defined by corresponding ridges (24) with intermediate grooves (26). At least one set of elongate ridges (24 and/or 20) have rounded top portions.

Abstract: A pup joint is provided which comprises a length of pipe, a female sub integral with one end of the pipe and having external threads formed thereon, a male sub integral with the other end of the pipe, a wing nut for threadedly connecting the male sub to the female sub, a set of retainer segments for retaining the wing nut on the pup joint, and a retention shoulder formed on the male sub to maintain the wing nut and retainer segments on the male sub. In a preferred embodiment of the invention, the pipe and the male and female subs are comprised of a single forging, and the retention shoulder is formed by machining the male sub.

Abstract: An improved male luer connector assembly including a central elongated male luer connector tapering from a distal end to a locking collar disposed approximately at the mid-point of the connector. A recessed section is disposed between the first collar and a second collar. Locking teeth are disposed on a proximal face of the locking collar in spaced relation. A threaded lock nut is mountable on the male luer connector. An inner peripheral end wall of the lock nut surrounds the male luer connector and carries a ratchet at an inner end face thereof. In the connection of the male luer connector assembly to a complementary female threaded luer connector, the engaging teeth on the proximal face of the locking collar are drawn into engagement with the ratchet on the inner face of the lock nut to ensure and maintain a locking fluid-tight connection between said male luer connector assembly and the female luer connector.

Abstract: A new fluid coupling assembly includes first and second split connection members positioned over a coupling member or gland of a fluid system. A body member is threadedly received over one end of the split connection members to define a split female nut member. A second threaded region of the body member has a different pitch and hand to facilitate make-up of the coupling assembly and assure that the components are urged together as the fluid components are brought into sealing engagement. A retaining collar is received over the split connection members to define a split male nut member.

Abstract: A new fluid coupling assembly includes a split male nut positioned over a coupling member or gland of a fluid system. The split male nut members are preferably formed of a precipitation hardenable material. Various interlock arrangements facilitate assembly of the split male nut halves. Moreover, providing indicia on the male nut halves assists in forming the threads and subsequent assembly. A female nut assembly includes a pair of inserts that are secured together by a collar having a shoulder defined by a counterbore. An external portion of the shoulder overlaps a counterbore formed therein to increase the strength of the female nut assembly.

Abstract: A split fitting for coupling two tubes, one having a large diameter, one having a small diameter, the fitting having mating first and second halves for surrounding the connection point between the larger and smaller tubes and forming a threaded neck portion for threading engagement with a nut slipped over an end of the larger tube for actuating a compression fitting to seal between the fitting and the larger tube. An O-ring seal is provided within the split fitting for sealing the fitting to the smaller diameter tube when assembled. The fitting halves are coupled together using captive screws and alignment pins.

Abstract: A split gland having only three parts to obtain effective stability to relative motion of the constituent half-gland members. A large area clamping ring generates a clamping force effective to maintain the alignment between male and female mirror image half-gland members. Ease of manufacture and use result from the reduction in complexity of the present invention.

Abstract: A telescopic pipe arrangement for use in situations where neither end can be rotated to change the length. An inner nut on an inner pipe bears against an end of an outer pipe and an outer nut either locks against the inner nut to enable inward or outward movement or locks against the outer pipe to lock the arrangement.

Abstract: A self-aligning quick connect coupling is disclosed for coupling two rods together having large diameter end portions with end surfaces in the form of spherical sectors. The coupling is formed in two halves threaded together and provides ample clearance for allowing the rods to be coupled together even though not axially aligned. The coupling halves are slotted to permit easy removal of the coupling halves from the rods when being uncoupled.

Abstract: A clamp for sealing leaks occurring between a pipe and a pipe fitting. The clamp is usable with common tee, straight, reducer, and 90.degree. elbow fittings and with various combinations of simple adapters can be used with at least two standard sizes of any such fittings. Two of the disclosed embodiments are particularly useful with flanged gate valves.

Abstract: A coupling formed of three integral pieces that snap-fit for assembly comprising a tubular adaptor having a threaded end and an outwardly extending flange, a tubular split nut that slidingly engages the adapter between the threaded end and the flange, and a ring member that slips over and tightly engages the nut.

Abstract: The nut (3) is rotatable on the external thread (4) on the conical pin (1). A shackle (6) is mounted on the said nut and is pivotable about an axis (7) transverse to and at a distance from the central axis. The shackle engages behind the swelling (5) on the conical sleeve (2) and can be tightened by turning the nut (3). The nut (3) is formed so as to be divisible and is held together by a clamping device (8).

Abstract: A method of repairing a leaking coupling between an air conditioning cooling coil and its associated expansion valve using a split clamp-on coupling nut. The nut consists of two mirror-image halves, the two halves being joined together by a pair of screws. The joined together halves provide a passageway sized and partially threaded to accommodate the flanged end of the cooling coil pipe and the threaded end of the expansion valve pipe when these two pipes are aligned along a common axis and the end of the expansion valve pipe abuts against the flange of the cooling coil pipe.

Abstract: The threaded split coupling nut system includes a threaded split coupling nut and coupling clamps. The threaded split-slip nut coupling has conventional nut shape but is split. The gripping nodules on the body are positioned parallel to the rotational center line of the split-slip nut coupling. The gripping nodules are formed as an integral past of the conventional and old slip nut coupling design. The gripping nodules are connected to or formed on the outside surface of the threaded split-slip nut coupling and the gripping nodules project outward in a radial direction from the rotational center line of the split-slip nut coupling. The conventional threaded split-slip nut coupling has been divided into two equal parts along a plane containing the rotational center line.

Abstract: A connector for tapered glass joints includes a first glass tubing section having a tapered sealing surface on an inner end surface thereof and threads on an outer surface of said end. A second glass tubing section has an end adapted to be telescoped into the end of said first tubing section, and a replaceable, resilient sealing sleeve is adapted to be sealingly engaged concentrically between the outer end surface of the second tubing section and the inner end surface of the first tubing section. A threaded cap is adapted to be threaded onto said threads of said first tubing section to secure the parts together and to force the sealing sleeve into tight sealing engagement with the respective tubing surfaces.

Abstract: There is disclosed an easily releasable fastener which is specifically designed for high torque applications. The fastener comprises a slotted nut having at least two axial slots, and preferably no more than one of the slots extends completely through the body of the fastener. The slots divide the fastener into at least two segments which, in the preferred embodiment are retained together by the residual portions of the incomplete slots. Each of the segments has a flat surface for torque transmission and the assembly of segments is surrounded by a thin retainer band seated in an annular groove about the body of the fastener. The fastener is mounted within a retaining ring which has internal flats that coact with the flatted surfaces of the individual segments. The retaining ring has external wrenching flats to permit the application of the fastener to a standard bolt.

Abstract: A split gland having only three parts is described. The gland has substantially the same stability to the relative motion of the constituent half-gland members during the attachment process to a female fitting as have more complicated designs. Ease of manufacture and use result from the reduction in complexity of the present invention.

Abstract: A fluid connector assembly is disclosed. The fluid connector assembly includes a first member having a body and a neck extending from the body. At least two peripheral grooves are formed in the neck. At least two resilient polymeric members are adapted to be received by the neck in the two peripheral grooves. A second member, having a central bore therethrough, is adapted to be received by the extending neck of the first member. The central bore has a first portion adapted to be coupled with one of the resilient polymeric members to seal the second member with the first member. A second portion of the central bore is adapted to be coupled with the other resilient polymeric member to retain the second member onto the first member.

Abstract: Composite tubing connector assemblies (10, 10a) comprising elongated tubes (14, 14a) of composite material, with liners (12, 12a) and with the tube having upsets (16, 16a) formed by compression rings (20, 20a) located near each end of the composite tubes and end fittings such as a connector pin (22) and connector box (24) positioned over the upsets (16, 16a) and locked in place by split nuts (26, 26a), pressing the upsets (16, 16a) against the compression rings (20, 20a) within the end fittings. When coupled together in end-to-end relationshiop, a seal ring (26) is placed between the assemblies (10, 10a) to form a liner-to-liner seal. This arrangement allows the composite tube (14) to be formed and the end fittings (22, 24) coupled thereto at a later date, if desired.

Abstract: A pup joint is provided which comprises a length of pipe, a female sub integral with one end of the pipe and having external threads formed thereon, a male sub integral with the other end of the pipe, a wing nut for threadedly connecting the male sub to the female sub, a set of retainer segments for retaining the wing nut on the pup joint, and a retention shoulder formed on the male sub to maintain the wing nut and retainer segments on the male sub. In a preferred embodiment of the invention, the pipe and the male and female subs are comprised of a single forging, and the retention shoulder is formed by machining the male sub.