Two-part nut with high pressing force

A nut, comprising:

• an internal threat;
• and
• two nut parts, each of the nut parts having a section of the internal thread which is radially slidable onto an external thread, the nut parts having co-operating connecting elements which permit relative displacement of the nut parts in a direction running radially to the axis of the internal thread until reaching a use position in which the internal thread of the nut engages around the external thread with a small clearance, wherein the connecting elements have guide surfaces which guide the nut parts in a rotational movement about an axis of rotation extending transversely to the axis of the internal thread when displaced into the use position, wherein each nut part has at least one first locking arm which has on one side a guide surface which induces the rotational movement when the nut parts are displaced and bears against a complementary guide surface on a second locking arm of the other nut part, wherein the nut has a plurality of pressure threads which are arranged around the internal thread and which receive pressure screws that can be screwed out in the axial direction from a first axial end face of the nut and have a receiving means for a screwing tool in the region of a second axial end face of the nut, wherein at least one pressure thread is arranged in the first locking arm, which has the first axial end face, and wherein the second locking arm with the second axial end face, which cooperates with the first locking arm, has a recess, through which the pressure screw projects.