MALE CONNECTOR/NYLON/Tube to Male Pipe Thread , 3/8 inch outside diameter, 1/4 inch pipe thread. 268N06X04NYLO-Seal Male Connector | Fits 3/8in Tubing, 1/4in Pipe ThreadNYLO-Seal Nylon Male Connectors have excellent resistance to acids, alkalis, dilute mineral acids, most organic acids, petroleum o..