Self-lubricating swivelling coupling

A self-lubricating swivelling coupling for providing a swivellable interconnection between first and second lines containing a fluid which provides lubrication, the swivelling coupling comprising:

• a housing comprising:
• internal surfaces comprising at least one radial surface and at least one axial surface, said internal surfaces defining a cavity having an open end;
• and
• a port having a bore therethrough in fluid communication with the cavity, the port being connectable to the first line;
• a male component having a bore therethrough, the male component comprising:
• a shank portion having a port connectable to the second line;
• and
• a flange portion extending radially outward from the shank portion, the male component being insertable within the cavity of the housing to enable the flange portion to cooperatively abut on the at least one radial surface, and to enable the bore of the male component and the bore of the port of the housing to be in fluid communication, the flange allowing a leak so that the fluid from the bore is partially leaked between the flange and the internal surfaces;
• and
• a nut securable within the cavity of the housing and surrounding the shank portion to radially restrain the same, the nut having a projection extending axially and internally into the cavity for axially restraining the flange and allowing the leak therebetween, the nut also allowing the male component to rotate with respect to the housing and the nut about a longitudinal axis of the shank portion, thereby enabling the first and second lines to be swivellably interconnected.