The present invention relates to block style tube and pipe hangers which include polymeric grommets that are used as a dampener or insulator for hanging tubes and pipes and particularly to a post and port arrangement for securing and aligning the silicone grommets during initial mounting and placement. The grommets are typically two opposing symmetrical parts that together define a passage having an inner diameter which directly surrounds and supports the pipe or tube, the post and port arrangement provides a structure and method for connecting the polymeric grommet parts and supporting the grommets on the pipe or tube during installation of the frame and support structure.