Long plug with large flange especially suitable for sealing the female part of quick connectors in fuel lines. The length of the plug ensures tight internal closure not only while transportation but during pressure tests as well. The flange protects the external surface, and makes the plug easy to remove. Available are two versions: with and without horizontal handle, to match packaging and ergonomics. Some plugs meet the requirements of SAE J2044 standard; therefore the dimension given for the diameter is not that of the plug itself but of the nominal size of the pipe for which it is suitable.