MALE RUN TEE/NYLON/ Tube to Male Pipe Thread to Tube , 1/2 inch tube outside diameter, 3/8 inch pipe thread. 271N08X06NYLO-Seal Male Run Tee | Fits 1/2in Tubing, 3/8in Pipe ThreadNYLO-Seal Nylon Male Run Tees have excellent resistance to acids, alkalis, dilute mineral acids, most organic acids, pet..