Mixed female connector or port

A connector, comprising:

• a female port that includes:
• a bearing surface that constitutes a first part of a first sealing device;
• a threaded inner surface that includes a thread, and the thread having a bottom;
• a bottom end surface that is inside and at an angle to the threaded inner surface;
• a geometric shape surface positioned proximate to the bottom, and the bottom end surface extending between the threaded inner surface and the geometric shape surface, and the bottom end surface being annular in shape and extending about the geometric shape surface;
• and
• the geometric shape surface constituting a first part of a second sealing device;
• and
• a second male connector that is received into the female port in a sealing manner to provide a second assembly that provides a second connection;
• and
• the female port for receiving, in a sealing manner, a first male connector to provide a first assembly, to provide a first connection and for enabling a flow of gas through the first connection, and
• the first male connector including a second part of the first sealing device;
• and
• the geometric shape surface (a) engaged with a compatible male metal geometric shape, situated at a distal end of the second male connector and (b) providing a metal-on-metal seal by contact of the geometric shape surface of the female port against the male metal geometric shape of the second male connector, and the male metal geometric shape providing a second part of the second sealing device;
• the second male connector including a threaded outer surface of the second male connector;
• the second male connector including an annular end surface that extends between the male metal geometric shape and the threaded outer surface of the second male connector, and
• the female port is suitable to receive, as an alternative to the second male connector, the first male connector so as to constitute the second assembly, and
• the first male connector and the second male connector being different types of connectors, and
• the first part of the first sealing device being the bearing surface for squeezing, when the first male connector is screwed into the female port, the second part of the first sealing device of the first male connector, and
• the second part of the first sealing device including a seal;
• and
• wherein construct of the female port, the first male connector and the second male connector is such that:
• the bearing surface (a) is engageable with the second part of the first sealing device in the first assembly, and (b) is not in contact with the second male connector in the second assembly;
• the threaded inner surface (a) is adapted to engage with a threaded outer surface of the first male connector in the first assembly, and (b) is engaged with the threaded outer surface of the second male connector in the second assembly;
• the bottom end surface (a) is adapted to engage with an end of the first male connecter, and in the first assembly, and (b) is not in contact with the second male connector in the second assembly;
• and
• the geometric shape surface (a) is not engageable with the first male connector in the first assembly, and (b) is engaged with the male metal geometric shape of the second male connector in the second assembly.