An assembly for a turbine engine, comprising: a mount comprising a threaded male portion, a projecting member projecting from the mount, wherein the projecting member is secured to the mount, a nut clamping around the male portion, and a device for limiting loosening of the nut (8, 9) relative to the mount, characterised in that the projecting member comprises a screw, wherein the loosening limitation device (8, 9) comprises: a rotation locking member configured to limit rotation of the nut relative to the mount, wherein the rotation locking member comprises: an annular ring surrounding the nut, a first lug and a second lug that radially project outwards from a body of the ring, wherein the lugs (87, 89) are spaced apart from one another in a circumferential direction of the ring, wherein the ring comprises an inner surface configured to limit rotation of the nut by shape engagement with an outer surface of the nut, wherein the rotation locking member is configured to retain the screw between the lugs (87, 89), wherein each of the lugs (87, 89) is configured to form an anti-rotation abutment for the screw, so as to limit rotation of the rotation locking member relative to the mount, wherein the device for limiting loosening (8, 9) comprises a translation locking member configured to limit translation of the rotation locking member relative to the nut, along the axis of the nut (X-X). a mount comprising a threaded male portion, a projecting member projecting from the mount, wherein the projecting member is secured to the mount, a nut clamping around the male portion, and a device for limiting loosening of the nut (8, 9) relative to the mount, characterised in that the projecting member comprises a screw, wherein the loosening limitation device (8, 9) comprises: a rotation locking member configured to limit rotation of the nut relative to the mount, wherein the rotation locking member comprises: an annular ring surrounding the nut, a first lug and a second lug that radially project outwards from a body of the ring, wherein the lugs (87, 89) are spaced apart from one another in a circumferential direction of the ring, wherein the ring comprises an inner surface configured to limit rotation of the nut by shape engagement with an outer surface of the nut, wherein the rotation locking member is configured to retain the screw between the lugs (87, 89), wherein each of the lugs (87, 89) is configured to form an anti-rotation abutment for the screw, so as to limit rotation of the rotation locking member relative to the mount, wherein the device for limiting loosening (8, 9) comprises a translation locking member configured to limit translation of the rotation locking member relative to the nut, along the axis of the nut (X-X). an annular ring surrounding the nut, a first lug and a second lug that radially project outwards from a body of the ring, wherein the lugs (87, 89) are spaced apart from one another in a circumferential direction of the ring, wherein the ring comprises an inner surface configured to limit rotation of the nut by shape engagement with an outer surface of the nut, wherein the rotation locking member is configured to retain the screw between the lugs (87, 89), wherein each of the lugs (87, 89) is configured to form an anti-rotation abutment for the screw, so as to limit rotation of the rotation locking member relative to the mount, wherein the device for limiting loosening (8, 9) comprises a translation locking member configured to limit translation of the rotation locking member relative to the nut, along the axis of the nut (X-X).