Your search for: Connection technology, Couplings, Safety exhaust couplings, Safety exhaust couplings, Steel design galvanized, Nominal diameter 7,4, 7,4, The first actuation of the push-button opens the clutch for venting, the second actuation causes complete disconnection. The body and connecting part can be turned against each other under pressure for positioning. We recommend the use of steel coupling plugs. returned 3 hits.