Abstract: A thread milling cutting tool for metal cutting includes an elongated main body having a cutting section, which extends axially rearward from a front end. The cutting section includes a plurality of teeth. The plurality of teeth include at least a first set of circumferentially spaced teeth, wherein each tooth of the at least first set has a same, first axial distance to the front end, and a clearance surface of each tooth has a radial clearance angle. The clearance surface of each tooth of the at least first set of teeth includes a rotationally leading portion and a rotationally trailing portion, wherein the leading portion extends from and rotationally behind the cutting edge, and the radial clearance angle (?) of the leading portion is smaller than the radial clearance angle (?) of the trailing portion.