Component having insert for receiving threaded fasteners

A component formed of a plastic matrix composite material is provided. The component has a metal liner (704) which is fixed in a correspondingly shaped recess formed in the composite material. The liner has a threaded bore (712) into which is screwed an externally threaded, hollow cylindrical, metal insert. The insert has an internal thread (716) for receiving threaded fasteners. The mouth of the bore has engagement formations which engage with the insert to prevent rotation of the insert in the bore, an adjacent part of the insert being plastically deformed to engage with the engagement formations (720) after being screwed into the bore.