System for coupling two aircraft turbine engine parts, preferably two turbine engine shafts

Abstract

The invention relates to a system (20) for coupling two aircraft turbine engine parts (22, 24), the system comprising a nut (32) for clamping the two parts together, and an anti-rotation ring (38) that comprises: - a first rotational coupling member (44a) intended to co-operate with a first complementary rotational coupling member (44b) provided on the first part (22), so as to form a first rotational coupling device; - a second rotational coupling member (46a) intended to co-operate with a second complementary rotational coupling member (46b) provided on the nut (32), so as to form a second rotational coupling device. The coupling system is configured such that the ring (38) can be placed in a provisional axial position relative to the nut and then be moved into a final coupling axial position.

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