Abstract: Closure element for tightly closing a bore, the closure body of which closure element can be pressed into the bore with an oversize. In order to avoid damage to the bore, the closure body is designed as a hollow body. In this way, the closure body can deform slightly as the closure body is pressed into the bore and can thereby reduce the radial pressure on the wall of the borehole. At the same time, the weight of the closure element is reduced. The closure element is preferably a hollow sphere having uniform wall thickness.

Abstract: The invention relates to a closure element (1) for tightly closing a bore (2), the closure body (3) of which closure element can be pressed into the bore (2) with an oversize. In order to avoid damage to the bore, the closure body (3) is designed as a hollow body. In this way, the closure body can deform slightly as the closure body is pressed into the bore (2) and can thereby reduce the radial pressure on the wall (4) of the borehole. At the same time, the weight of the closure element is reduced. The closure element is preferably a hollow sphere having uniform wall thickness.

Abstract: An element is provided in particular as a closure element or fastening element for inserting into a bore in a component, such as into a bore in an engine, a valve block, a hydraulic unit or a container. At least one electric element which is arranged in or on the element is provided, wherein each electric element transmits and/or receives electric signals. In the fitted state, the electric element is advantageously positioned such that the electric element is adjacent to the chamber formed in the bore and is therefore in contact, for measuring purposes or the like, with the medium contained in the bore. In addition to the actual sealing and/or fastening function, the element can therefore be used to undertake one or more measurements, etc.

Abstract: An element is provided in particular as a closure element or fastening element for inserting into a bore (12) in a component (11), such as into a bore in an engine, a valve block, a hydraulic unit or a container. At least one electric element (20) which is arranged in the element (10) or on the element (70) is provided, wherein each electric element (20) transmits and/or receives electric signals. In the fitted state, the electric element (20) is advantageously positioned in such a manner that said electric element is adjacent to the chamber (12?) formed in the bore (12) and is therefore in contact, for measuring purposes or the like, with the medium contained in the bore (12). In addition to the actual sealing and/or fastening function, said element can therefore be used to undertake one or more measurements, etc.