Abstract: A threading bolt (1) for stacking sheets provided with at least one threading hole (2), in particular core sheets (3) of transformer cores, on a core stacking table (4), on a building platform, on a stacking device or the like, at least one threading bolt (1) being positionable on the core stacking table (4), on the building platform, on the stacking device or the like, wherein the outer diameter (Da) of the threading bolt (1) is adaptable to different inner diameters (di) of the threading holes (2).