MALE CONNECTOR/NYLON/Tube to Male Pipe Thread , 1/4 inch tube outside diameter, 1/4 inch pipe thread. 268N04X04NYLO-Seal Male Connector | Fits 1/4in Tubing, 1/4in Pipe ThreadNYLO-Seal Nylon Male Connectors have excellent resistance to acids, alkalis, dilute mineral acids, most organic acids, petro..