Abstract: A thermal triggering element for a thermal switching element in the form of a glass vial having an elongated shape, a completely enclosed interior space filled with a triggering liquid and including a gas bubble. The glass vial features along its longitudinal direction, positioned in a manner facing each other, a first longitudinal end with a tip emerging from a circumferentially running edge, in particular a circumferentially running thickened section, and a second longitudinal end with a rounded end. The vial is inserted as a thermal triggering element in the thermal switching element without the addition of fat or oil in the installation process. During the screwing-in of the abutment a significantly reduced torsion moment is applied to the glass vial, as compared to a conventional process without oil or fat. The glass vial is treated on at least the second longitudinal end in a friction-reducing manner.