Abstract: A connection for the supply of fluid under pressure to a rotary member. The connection comprising a rotary member having a rotary surface; a non-rotatory annular member having a stationary surface engaged with said rotary surface at an interface therebetween; a finite clearance between said surfaces at the interface; one fluid passageway in the non-rotatory member connecting with the interface; a second fluid passageway in the rotary member connecting with the interface; and a groove providing a continuous connection between the two passageways. There are two seals, located either side of the groove at the interface which act between the two members and a bearing ring also arranged at the interface to hold the non-rotatory member concentric with rotary member, the non-rotatory member being free to move radially except for the contraint provided by the bearing ring.