Bulkhead Quick Connector Qck-3/8-Pk-9-B Female Thread with Sealing Ring. Nominal Size=8 Mm, Type of Seal On Screw-In Stud=Sealing Ring, Assembly Position=Any, Operating Medium=Compressed Air In Accordance with Iso8573-1:2010 [7:-:-], Pneumatic Connection, Port 1=Female Thread G3/8, Festo