Sanitary installation part

Sanitary fixture (1, 2, 4, 5, 6, 7) comprising a mounting housing (9) which has a thread (10) for fastening to a mating thread (11) provided on a water outlet (70) of a sanitary outlet fitting (8), wherein the mounting housing (9) has a downstream housing end side (12) with flow-through holes (13), and wherein at least one insertion part can be inserted into the mounting housing (9) as far as an insertion stop, the fixture (1, 2, 4, 5, 6, 7) has an aerated jet regulator or is configured as such, in that a circumferential wall of the mounting housing (9) borders at least one aeration duct (14) at least in a subregion of at least a double-walled configuration, and the at least one aeration duct (14), which is open towards the downstream housing end side (12), opens out in at least one aeration opening (15) leading into a housing interior of the mounting housing (9), wherein the downstream housing end side (12) is of convexly or spherically curved design in a downstream direction and has at least one slot (20, 21) with opposing slot longitudinal sides that are configured as rotation or tool engagement surfaces for a rotation tool which can be inserted into the at least one slot (20, 21), the fixture (1, 2, 4, 5, 6, 7) further comprises at least one of a flow-through quantity regulator (34) or a baffle connected upstream of the aerated jet regulator in a flow direction, and an ancillary sieve (38) is connected upstream of the aerated jet regulator and optionally the flow-through quantity regulator (34) in the flow direction.