Long plug with large flange especially suitable for sealing the female part of quick connectors on brake and fuel lines. The length of the plug ensures tight internal closure. The flange protects the external surface, and makes the plug easy to remove. Most of them are with or without tabs, 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.
