Abstract: The present invention provides a fastener for securing two pipe adapters within a casing such as a gas turbine casing. The fastener comprises a fastener body having a central bore for receiving the pipe adapters and having a first engagement portion, e.g. a radial projection extending into said central bore, for engagement with a first pipe adapter. The central bore has a second engagement portion, e.g. a threaded portion, for engagement with a second pipe adapter. The fastener further comprises an outer wall at least partly surrounding and spaced from the fastener body in a concentric arrangement. The outer wall comprises a fastener flange extending radially in a direction away from the fastener body for overlaying the casing. At least a portion of the outer wall is deformable (e.g. formed as bellows) so that, in use, axial and/or radial movement of the pipe adapters is dampened.

Abstract: The present invention provides a fastener for securing two pipe adapters within a casing such as a gas turbine casing. The fastener comprises a fastener body having a central bore for receiving the pipe adapters and having a first engagement portion, e.g. a radial projection extending into said central bore, for engagement with a first pipe adapter. The central bore has a second engagement portion, e.g. a threaded portion, for engagement with a second pipe adapter. The fastener further comprises an outer wall at least partly surrounding and spaced from the fastener body in a concentric arrangement. The outer wall comprises a fastener flange extending radially in a direction away from the fastener body for overlaying the casing. At least a portion of the outer wall is deformable (e.g. formed as bellows) so that, in use, axial and/or radial movement of the pipe adapters is dampened.