Closure cap, especially for closing the connection of an oil filter

摘要

The invention relates to a closure cap, especially for closing a screw neck of an oil filter connection in motor vehicles. An elastically expandable nut element ( 5,20 ) is arranged in the closure cap. Said nut element is such that it can be placed on screw necks ( 3 ) of various diameters, engaging with the outer thread of the screw neck.