A wellhead assembly includes a wellhead housing, the wellhead housing including a lock screw receptacle. The wellhead assembly includes an outer nested wellhead component positioned within the wellhead housing, the outer nested wellhead component including a lock screw aperture. The wellhead assembly includes an inner nested wellhead component, the inner nested wellhead component including an inner receptacle. The wellhead assembly includes a nested lock screw. The nested lock screw includes an outer sleeve, the outer sleeve having external threads formed on an outer surface thereof, the outer sleeve threadedly coupled to the lock screw receptacle of the wellhead housing. The nested lock screw includes an inner lock screw, the inner lock screw positioned within and threadedly coupled to the outer sleeve, the inner lock screw passing through the lock screw aperture and engaging the inner receptacle.

The present invention relates to a connection structure of a metal corrugated pipe, which is used to connect metal corrugated pipes with each other or to connect a metal corrugated pipe to a boiler combustor. The connection structure includes a first connection member having one side, in which an external thread is formed on an outer surface of the one side and an inner surface of the one side has a diameter gradually reduced to form an inclined surface; a second connection member formed on an inner surface thereof with an internal thread screw-coupled with the external thread; and a heat-resistant packing fitted on the outer surface of the metal corrugated pipe, in which a front end of the heat-resistant packing is compressed by the inclined surface as the first connection member is screw-coupled with the second connection member.

The present invention relates to a connection structure of a metal corrugated pipe, which is used to connect metal corrugated pipes with each other or to connect a metal corrugated pipe to a boiler combustor. The connection structure includes a first connection member having one side, in which an external thread is formed on an outer surface of the one side and an inner surface of the one side has a diameter gradually reduced to form an inclined surface; a second connection member formed on an inner surface thereof with an internal thread screw-coupled with the external thread; and a heat-resistant packing fitted on the outer surface of the metal corrugated pipe, in which a front end of the heat-resistant packing is compressed by the inclined surface as the first connection member is screw-coupled with the second connection member.

According to one embodiment a pipe connection comprises a connection body produced from a plastic material, the connection body having at least one projecting periphery, arranged on the end side, and having a retaining region located axially downstream of said periphery. The pipe connection further comprises a union nut produced from a metal material, the union nut pushed over the connection body and having an annular depression in a region located opposite the retaining region of the connection body. The pipe connection further comprises a retaining ring arranged in the annular depression between the connection body and the union nut, securing the union nut in a rotatable manner on the connection body.

According to one embodiment a pipe connection comprises a connection body produced from a plastic material, the connection body having at least one projecting periphery, arranged on the end side, and having a retaining region located axially downstream of said periphery. The pipe connection further comprises a union nut produced from a metal material, the union nut pushed over the connection body and having an annular depression in a region located opposite the retaining region of the connection body. The pipe connection further comprises a retaining ring arranged in the annular depression between the connection body and the union nut, securing the union nut in a rotatable manner on the connection body.

A tube coupling assembly is disclosed, which comprises a first connector for connecting to a tube; a second connector for jointing with the first connector; a first member is adapted to mount on the first connector and operably affixable to the second connector; and a second member is adapted to mount on the second connector, and is capable of being engaged with the first member to prevent separation between the first connector and the second connector.

An airline couple that provide consumers a way to keep air lines connected while driving. The first airline couple includes a first airline connector extending forward, an airline clip including a planar rectangular tab that includes a pair of apertures disposed on the planar rectangular tab and a second airline connector extending back towards the airline clip, the airline clip is wrapped around the first airline connector and the second airline connector. The airline couple includes a piece of putty wrapped around each end of a first airline connector and a second airline connector, the piece of putty hardens between each end of the first airline connector and the second airline connector securing each end of the first airline connector and the second airline connector.

A fastener assembly includes a tube fitting defining a longitudinal axis, a lock assembly releasably coupled to the tube fitting and including teeth, and a conduit nut. The conduit nut defines an inner cavity sized and shaped to receive a portion of the tube fitting. The conduit nut includes a circumferential wall extending about a periphery of the conduit nut, and notches. The lock assembly is positionable between a locked position in which the teeth are engaged with the notches and an unlocked position in which the teeth are spaced from the notches. The tube fitting is fixed against rotation within the inner cavity when the lock assembly is in the locked position. The tube fitting is rotatable within the inner cavity when the lock assembly is in the unlocked position.

A one-touch pipe connection device includes a socket main body portion, wherein a plurality of pipe fitting portion, in each of which a pipe to be connected is inserted, are connected to each other, a sealing portion provided between the socket main body portion and the pipe to be connected and sealing between the pipe to be connected inserted in the pipe fitting portion and the socket main body portion, and a cap portion having a through hole therein for passing the pipe to be connected inserted in the pipe fitting portion, coupled to the pipe fitting portion while moving in an insertion direction of the pipe to be connected inserted in the pipe fitting portion, and, when coupled to the pipe fitting portion, pressing the sealing portion in a direction in which the sealing portion closely contacts the pipe to be connected.

A one-touch pipe connection device includes a socket main body portion, wherein a plurality of pipe fitting portion, in each of which a pipe to be connected is inserted, are connected to each other, a sealing portion provided between the socket main body portion and the pipe to be connected and sealing between the pipe to be connected inserted in the pipe fitting portion and the socket main body portion, and a cap portion having a through hole therein for passing the pipe to be connected inserted in the pipe fitting portion, coupled to the pipe fitting portion while moving in an insertion direction of the pipe to be connected inserted in the pipe fitting portion, and, when coupled to the pipe fitting portion, pressing the sealing portion in a direction in which the sealing portion closely contacts the pipe to be connected.