One-Way Flow Control Valve Grla-3/8-QS-6-Rs-D with Knurled Screw and Lock Nut Valve Function=One-Way Flow Control Function, Pneumatic Connection, Port 1=Qs-6, Pneumatic Connection, Port 2=G3/8, Adjusting Element=Knurled Screw, Mounting Type=(* Threaded, * with External (Male) Thread), Festo