Quick connector CK-1/4-PK-9 Male thread with sealing ring metal version. 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:-:-] * Water as per manufacturer’s declaration at wwwo) Note on operating and pilot medium=Lubricated operation possible (subsequently required for further operation)