Abstract: A connection device for a fluid duct includes a metallic holding body, a sleeve-like insert body, and a synthetic resin retaining ring. The metallic holding body is formed with a socket having an inner periphery formed with an annular groove. The sleeve-like insert body has an outer periphery and is configured to be plugged into the socket. The synthetic resin retaining ring is fixed in the annular groove so that the retaining ring will bear axially against the holding body. At least one projection is provided on the outer periphery of the insert body for biting into the retaining ring upon insertion of the insert body into the socket.

Abstract: A connection device for a fluid line having a connection unit (12) with a sleeve-like insert body (16) placed by plugging in a socket (3) in the metallic holding body (8). On the outer periphery of the insert body (16) anchoring means (18) are provided, which serve for anchoring in the socket (3) and are formed by one or more projections. A retaining ring (24) consisting of synthetic resin material is fixed in an annular groove (25) provided on the inner periphery of the socket (3) so that the retaining ring may bear in either in relation to the holding body (8). The insert body (16) is inserted coaxially into the retaining ring (24) and has its anchoring means (18) biting into the synthetic resin material of the retaining ring (24).