Pipetting apparatus and methods for an automatic analysis device

A pipetting apparatus for an automatic analysis device, comprising a needle and a fastening body, wherein the needle includes a hollow-cylindrical needle body having two ends and a constant outer diameter between the two ends, and the fastening body is arranged around an axial region of the needle body and is configured to fasten the needle body on a holder of the automatic analysis device, wherein the fastening body is configured as a conical frustum, the imaginary vertex of which lies in a longitudinal axis of the hollow-cylindrical needle body, and the two ends of the needle body each extend beyond the fastening body, the fastening body comprising a holding pin extending perpendicularly to the longitudinal axis of the hollow-cylindrical needle body in order to prevent rotation of the hollow-cylindrical needle body about the longitudinal axis;

• wherein:
• the fastening body comprises a base surface part, an inner part, and an outer part having a hollow conical frustum body sized to receive the inner part therein, the inner part comprising a hollow-cylindrical body enclosing the needle and comprising a plurality of disks each extending concentrically therefrom and each having a radius different than others of the plurality of disks to provide a form-fit connection to the outer part and to the base surface part.