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 6110-00-492-1167
NSN 5996-01-348-1591
NSN 6320-00-937-5625
NSN 5835-00-491-3834
NSN 6150-00-556-8087
NSN 5915-01-245-6553
NSN 5915-01-443-3881
NSN 5925-01-181-4740
NSN 6320-01-259-2604
NSN 5975-00-114-0019
NSN 6240-01-523-4241
NSN 6240-01-138-6453