Abstract: A retaining nut comprises a nut body and a plurality of axially extending integrally formed deflectable locking fingers. The locking fingers have a frusto-conical surface opposite a threaded surface. The frusto-conical surface of the locking fingers are adapted to co-operate with a conical washer. Tightening the threaded nut on a threaded shaft against the washer causes the locking fingers to deflect radially towards the shaft. This provides a secure radial clamping of the nut on the shaft.

Abstract: A retaining nut comprises a nut body and a plurality of axially extending integrally formed deflectable locking fingers. The locking fingers have a frusto-conical surface opposite a threaded surface. The frusto-conical surface of the locking fingers are adapted to co-operate with a conical washer. Tightening the threaded nut on a threaded shaft against the washer causes the locking fingers to deflect radially towards the shaft. This provides a secure radial clamping of the nut on the shaft.

Abstract: The invention relates to a fuel pipe coupling (101), in particular a fuel pipe coupling for an aircraft. The invention provides a pipe end fitting (102) including a flange (103), a resiliently deformable interfacing body (105) including a partially spherical internal surface (112) and a socket arrangement (104). The coupling is arranged such that the flange (103) of the pipe end fitting (102) is associated with the partially spherical internal surface (112) of the resiliently deformable interfacing body (105) and may move both axially and angularly with respect to the socket arrangement (104).