A cover lid (50) for a housing (1) for electric or electromagnetic applications, such as a housing for a coupler or a filter, and designed to reduce passive intermodulation (PIM) is disclosed. The cover lid comprises a cover lid plate (52) having a bottom plate surface (53), an upper plate surface (54), the upper plate surface being arranged substantially parallel to the bottom plate surface, and a lateral lid surface (55) joining the bottom plate surface and the upper plate surface, wherein the lateral lid surface (55) comprises a bevelled portion (58). A housing (10) comprises a cover lid (50) press fitted into the cover lid reception space (20). The invention also discloses a method of assembly of the housing with a cover lid, which is press fitted into the housing.