Decompression seal (1) for connecting components (3, 4, 5) having openings (2) which opens on excessive pressure. It consists of a retaining-bolt-like arrangement (6) with a bolt head (7) and a locking head (8) with recesses (8-1, 8-2) into which, in the retaining position, the ends of leaf-spring arms (9-3, 9-2) engage. These recesses (8-1, 8-2) and the leaf-spring arms are formed in such a way that when a certain pressure accumulates on the side of the upper component (5) the retaining position is released and the retaining-bolt-like arrangement (6) is pushed axially (17) in direction (R) towards the bolt head (7). Through the threaded connection of the shafts (11, 12) this decompression seal (1) allows the components (3, 4, 5) to be drawn together by turning the bolt head (7). A rotation lock (15, 16) prevents the connection from working loose.