Mounting device for a burner ring inside a postcombustion chamber of a turbo-jet engine

The device has a locking part (52) engaged between plates (34, 36) and between ends of sectors forming a spray ring. The ends are immobilized between the plates by the part, where the plates are parallel to circumferential orientation of an afterburner flame holder arm (14). The part is retained by a rod (54) and a pin (56) that are engaged in aligned orifices (58, 60) of the plates and in a traversing passage (64) of the part.