Tube end also threaded ext pipe 3/8-18
An adapter having standard pipe threads on one end or an unthreaded end designed to accommodate a pipe. The other end has machine threads (straight threads other than pipe or hose series) designed to accommodate a tube or is unthreaded and designed to accommodate a tube. It is designed to join a pipe or pipe fitting to a tube or tube fitting in a straight line.
Classification: Stainless steel tube or pipe fittings nesoi
NSN 5990-01-124-9063
NSN 5895-01-504-1570
NSN 6620-00-834-4801
NSN 4140-00-706-8991
NSN 5935-01-049-2873
NSN 5960-00-116-1965
NSN 5996-00-482-4565
NSN 6645-01-529-8822
NSN 6650-00-137-5859
NSN 6150-00-278-7070
NSN 5915-01-090-8013
NSN 7035-01-323-8262