Abstract: A pole cap is presented made of a plastic material for the pressure-tight closure of a pressure vessel. The pole cap comprises an inner side for the later closure of the pressure vessel, an outer side for the superwinding with a fiber composite material after closure of the pressure vessel and a neck-shaped open duct, which protrudes outwardly from the outer side and has an inner contour, each made of plastic material, and comprises a pressure port element connected to the duct for the closure of the duct, wherein the pressure port element comprises a seal cone made of metal with a first section protruding outwardly through the duct and a second section tapering at least in the area of the duct in a cone-shaped manner in the direction of the first section.

Abstract: A pole cap is disclosed made of a plastic material for the pressure-tight closure of a pressure vessel. The pole cap comprises an inner side for the later closure of the pressure vessel, an outer side for the superwinding with a fiber composite material after closure of the pressure vessel and a neck-shaped open duct, which protrudes outwardly from the outer side and has an inner contour, each made of plastic material, and comprises a pressure port element connected to the duct for the closure of the duct, wherein the pressure port element comprises a seal cone made of metal with a first section protruding outwardly through the duct and a second section tapering at least in the area of the duct in a cone-shaped manner in the direction of the first section.