Joining connections are presented for joining the functional parts of
hydraulic or pneumatic operating devices the joining connections
including a first part exhibiting an external wall section and a second
part exhibiting an internal wall section, which are joined together with
mutually overlapping wall sections having depressions that form a cavity,
in the connected state that is filled with a fluid casting compound of
plastic that connects the two parts together by means of a positive form
fit after hardening to prevent relative displacements between the two
functional parts and to seal the separating gap clearance between the
wall sections of the two functional parts.