First line has crimp fitting
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: Copper alloy tube or pipe fittings
NSN 5920-00-325-3980
NSN 5910-01-171-4310
NSN 6620-00-049-4613
NSN 6110-01-459-9022
NSN 5950-01-382-8209
NSN 5905-01-316-8946
NSN 5996-00-034-4779
NSN 5996-00-991-2229
NSN 5855-01-392-1808
NSN 5895-00-147-4101
NSN 5895-01-215-8483
NSN 5998-00-456-6527