Quick coupling socket KDS6-CK-9-S Self-closing, for safety coupling per ISO 4414, bulkhead fitting Nominal size=7,4 mm, Operating pressure complete temperature range=-0,5 - 12 bar, Standard nominal flow rate=1274 l/min, Operating medium=Compressed air in accordance with ISO8573-1:2010 [7:-:-], Note on operating and pilot medium=Lubricated operation possible