A pole part for medium voltage switchgear includes: a vacuum interrupter embedded in an insulating housing including at least one of epoxy, a bulk moulded component, or a thermoplastic or plastic material, a bottom part of the insulating housing including a mechanical fixation device for fixing the pole part on a support element. The bottom part of the pole part includes a casted on or moulded on axial externally or internally threaded section that includes an insulating material.