Connect your 1/2 tubing to 3/8 NPT threads with the HYDROLICO ZPD1/2-03T Male Run Tee Fitting. This durable mechanical fitting ensures a secure and reliable connection for your fluid transfer needs.The HYDROLICO ZPD1/2-03T is a male run tee fitting designed for connecting 1/2 inch tubing to a 3/8 inch NPT thread. It is sold in units of 1.