Abstract: A tube fitting for attaching and detaching a tube. The tube fitting includes a tubular main body, a sleeve being tubular-shaped and being fixed in the main body with axial lines of the main body and the sleeve coincided with each other. A locking member includes a ring part and a plurality of extended parts extending from the ring part toward an axial direction and being mounted in the sleeve in a state where axial lines of the ring part and the sleeve are coincided with each other and being movable in the sleeve in an axial direction and in a circumferential direction.

Abstract: A tube fitting is provided which is capable of easily attaching and detaching a tube by one hand manipulation and of more improving attachability and detachability and setting pressure contact force to be higher. The tube fitting including a tubular main body, a sleeve being tubular-shaped and being fixed in the main body with axial lines of the main body and the sleeve coincided with each other, a locking member having a ring part and a plurality of extended parts extending from the ring part toward an axial direction and being mounted in the sleeve in a state where axial lines of the ring part and the sleeve are coincided with each other and being movable in the sleeve in an axial direction and in a circumferential direction.

Abstract: A tube fitting is provided which is able to be easily attached even in a narrow attaching place. The tube fitting 1 includes one or more fitting parts 4 to be connected to an external tube formed at one end of a main body 2 and a screw part for attachment 3 formed at another end of the main body 2, wherein fluid passes through an inside part thereof and wherein the screw part for attachment 3 has, at its external circumference, screw threads and, in its inside part, a tool connecting part into which a non-inverse and inverse rotation tool to rotate the screw part for attachment 3 non-inversely and inversely is allowed to be fitted, and a pipe path through which fluid passes.

Abstract: To provide a thread in which looseness can be prevented over a long period of time, and a high sealing properties can be maintained, a manufacturing method of the thread, a fastening system using the thread, and a pipe fitting using the thread. A thread according to the present invention is provided, wherein, a screw thread member of which screw threads are formed on an outer periphery thereof and which is made up of a softer material than that of an insert core is formed in a close contact with an outer periphery of the insert core, large-diameter parts that sandwich the screw thread member therebetween in an axis line direction are formed, in a fore end part and a rear end part of the insert core or an intermediate part nearer to the fore end part 3a from the rear end part, and screw threads that are continuous to screw threads of the screw thread member are formed on an outer periphery of a large-diameter part of the fore end part.

Abstract: A tube fitting which can change a position (angle) of a fitting part to connect external tube thereto is provided. A tube fitting 1, which comprises a fitting part 4 at one end side of a body 2, and a installation screw part 3 at the other end side, wherein the body 2 includes a pipe path 20, inside of which fluid passes, the fitting part 4 includes an opening part 42 at the rear end thereof, to which external tube 60 is inserted, and a pipe path 40, inside of which fluid passes, the fitting part 4 being connected to a connecting part 24 provided in a side part of the body 2 so that the fitting part 4 is rotatable in a direction where an angle between center axis of the opening part 42 and center axis of the installation screw part 3 varies, one end of a pipe path 40 of the fitting part 4 communicates with the opening part 42 and the other end of the pipe path communicates with the pipe path 20 of the body 2 via the connecting part 24.