The invention relates to a tension lock for connecting a first component to a second component, in particular for connecting a cover (12) to a container (13), said cover closing an opening. To adjust the tension applied, the tension lock has an adjusting mechanism in the form of an internal eccentric bearing (6, 7) of a bearing pin (8) for a tensioning bow (4) of the tension lock. The tension lock, which can be dismantled into individual parts without the use of screws, offers good protection against contamination and can be cleaned particularly well. The tension lock is therefore particularly suitable for applications in the pharmaceutical industry or food industry.