Rigid connector for mechanical coupling of components

A rigid connecting portion for mechanical coupling of at least a first component and a second component, the rigid connecting portion comprising:

• at least one opening;
• a longitudinal center axis with a center point assigned to the opening;
• at least one end region in which the opening is arranged;
• an outer boundary surface at least partially surrounding the opening;
• and
• an inner boundary surface configured such that the opening is entirely bounded in a radial direction by the inner boundary surface,
• the inner boundary surface and the outer boundary surface being arranged at a distance from each other such that the rigid connecting portion partially surrounds the opening in a ring-like manner with a ring thickness varying in an angular range oriented toward an outer end of the at least one end region from 0° to 90° relative to the longitudinal center axis,
• the ring thickness in an angular range oriented toward the outer end from at least 80° to 90° relative to the longitudinal center axis being greater than the ring thickness in an angular range oriented toward the outer end from at least 30° to 60° relative to the longitudinal center axis.