The invention relates to a combination (1) comprising a housing (2) and a flange (3) which has a first flange side (4) and a second flange side (5) opposite the first flange side. The combination (1) comprises a collar (6) which is either part of the housing (2) or is secured to the housing (2), and the collar (6) is inserted into a connection opening (7) of the flange (3). The flange (3) has at least one first assembly opening (8) which is formed at a distance from the connection opening (7). In order to advantageously develop the combination, a depression (34) which runs around the at least one assembly opening (8) is formed in the flange (3) on the first flange side (4). The depression (34) has an inner edge (35) which runs laterally along the entire circumference of the depression at a distance (x) from the assembly opening (8). The invention further relates to an assembly which comprises an aforementioned combination (1), a housing (18), in particular a cylinder head housing of a motor, and screws (19) for assembling the combination (1) on the housing (18).