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. Each flat surface of the grommet parts is substantially sloped to prevent the collection of liquids, dirt or debris.