A rain tight connector may include a connector body, a gland nut coupled to the connector body, and a compression ring. A locknut is coupled to the connector body on the end portion thereof opposite to the gland nut. The compression ring includes a central portion and first and second coaxial end portions. The central portion defines an annular stop. A locking unit with a plurality of locking teeth is provided in the present invention to further secure the metal tube. More specifically, the locking unit can be inserted into the compressing ring to strengthen its structure to securely hole the metal tube

A rain tight connector may include a connector body, a gland nut coupled to the connector body, and a compression ring. A locknut is coupled to the connector body on the end portion thereof opposite to the gland nut. The compression ring includes a central portion and first and second coaxial end portions. The central portion defines an annular stop. A locking unit with a plurality of locking teeth is provided in the present invention to further secure the metal tube. More specifically, the locking unit can be inserted into the compressing ring to strengthen its structure to securely hole the metal tube

A ratchet fitting includes a screw portion and an operating portion. One of the screw portion and the operating portion has an engaging member, and the other one of the screw portion and the operating portion has an elastic member and a holding member formed separately from the elastic member. The elastic member and the engaging member are fitted such that a rotational force is transmittable to each other due to engagement of the projection and the protrusion and engagement between the projection and the protrusion is releasable due to deformation of the elastic member. The elastic member has a first fitting portion, the holding member has a second fitting portion, and the holding member and the elastic member are fitted such that the first fitting portion and the second fitting portion are fitted to each other in a rotation direction.

A metallic-composite joint fitting is provided. The fitting may comprise a composite structure, an integral bearing comprising a first frustoconical portion and a second frustoconical portion each having a complimentary shape to the composite structure, a sleeve comprising a third frustoconical portion coupled to a cylindrical bearing surface of the integral bearing, and a metallic end fitting coupled to the third frustoconical portion, wherein the metallic end fitting comprises a bearing portion contacted with the cylindrical bearing surface.

A ratchet fitting includes a screw portion and an operating portion. One of the screw portion and the operating portion has an engaging member, and the other one of the screw portion and the operating portion has an elastic member and a holding member formed separately from the elastic member. The elastic member and the engaging member are fitted such that a rotational force is transmittable to each other due to engagement of the projection and the protrusion and engagement between the projection and the protrusion is releasable due to deformation of the elastic member. The elastic member has a first fitting portion, the holding member has a second fitting portion, and the holding member and the elastic member are fitted such that the first fitting portion and the second fitting portion are fitted to each other in a rotation direction.

A fitting assembly configured to visibly indicate nut tightness when coupling a first component to a second component is disclosed. The fitting assembly comprises a nut comprising a threaded portion and a chamber portion, wherein the chamber portion comprises one or more through-holes. The fitting assembly also comprises an indicator slidably disposed within the chamber portion, a retainer assembly disposed within the chamber portion and configured to interlock with an inner surface of the nut, and a spring disposed within the chamber portion between, and engaging, the indicator and the retainer assembly. The retainer assembly is configured to interface with the spring to retain the spring within the chamber portion. The fitting assembly is configured to receive the first component and the second component such that, when the nut is rotated, a visibility of the indicator through the one or more through-holes changes.

A method of installing an insert in a body is provided, including advancing an insert into a bore of the body bounded by a lip so that a round seal of the insert passes the lip with a clearance therebetween, and so the insert first engages the body with a contact rim rather than the round seal. Accordingly, the round seal is not compromised to self-center the insert in the bore. The bore can include a shoulder distal from the lip. The round seal, which optionally can be an O-ring, can sealingly engage the shoulder and a secondary bore after the insert is self-centered in the bore. The round seal can be advanced farther into the body so another contact rim engages the shoulder. The insert can be heated so components of the body melt and fuse to parts of the insert during installation. A related system is provided.

A method of installing an insert in a body is provided, including advancing an insert into a bore of the body bounded by a lip so that a round seal of the insert passes the lip with a clearance therebetween, and so the insert first engages the body with a contact rim rather than the round seal. Accordingly, the round seal is not compromised to self-center the insert in the bore. The bore can include a shoulder distal from the lip. The round seal, which optionally can be an O-ring, can sealingly engage the shoulder and a secondary bore after the insert is self-centered in the bore. The round seal can be advanced farther into the body so another contact rim engages the shoulder. The insert can be heated so components of the body melt and fuse to parts of the insert during installation. A related system is provided.

A ferrule for a conduit fitting includes an interior wall extending along a central axis through the ferrule so that the ferrule can be installed over a conduit end. A first axial side of the ferrule defines a first end portion, a first end camming surface disposed on the first end portion at a first angle with respect to the central axis, and a first end driven surface disposed at a second angle with respect to the central axis, the second angle being greater than the first angle. A second axial side of the ferrule defines a second end portion, a second end camming surface disposed on the second end portion at a third angle with respect to the central axis, the third angle being substantially equal to the first angle, and a second end driven surface disposed at a fourth angle with respect to the central axis, the fourth angle being substantially equal to the second angle. A central boss portion extends radially outward to define a radially outermost surface at an axial center point of the ferrule.

A ferrule for a conduit fitting includes an interior wall extending along a central axis through the ferrule so that the ferrule can be installed over a conduit end. A first axial side of the ferrule defines a first end portion, a first end camming surface disposed on the first end portion at a first angle with respect to the central axis, and a first end driven surface disposed at a second angle with respect to the central axis, the second angle being greater than the first angle. A second axial side of the ferrule defines a second end portion, a second end camming surface disposed on the second end portion at a third angle with respect to the central axis, the third angle being substantially equal to the first angle, and a second end driven surface disposed at a fourth angle with respect to the central axis, the fourth angle being substantially equal to the second angle. A central boss portion extends radially outward to define a radially outermost surface at an axial center point of the ferrule.