... , air coupling); interchange with Rectus 19, CEJN295, PCL air couplers; Name: 1/4" body PCL coupling and plugs(quick coupler, air coupling ... ); interchange with Rectus 19, CEJN295, PCL air couplers;Thread: BSPT; Shape: Female, male, hose barb, plug ... its working pressure, air leakage, surface finishing and thread test. PCL Coupling(Quick Coupler, Air Coupling)