Suction unit, particularly for internal combustion engine

摘要

The screw socket (13) at its end (15) facing the cylinder head (9) has a pre-centre section (17). This section accommodates a bolt (7). Between the pre-centre section and a screw socket central section (21) a threaded section (19) is provided. The length of the threaded section is greater than or equal to the length of the pre-centre section. The screw socket in the transition area between the pre-centre section and the threaded section has a ring-shaped shoulder. The hole (11) of the suction unit has a ring-shaped narrowing or individual burls, on which the ring-shaped shoulder of the screw socket supports, enabling the screw socket to be pushed back on fitment of the bolt.