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 5905-00-036-6040
NSN 5998-01-465-5096
NSN 5998-00-801-6527
NSN 6240-00-849-5026
NSN 5905-01-360-9388
NSN 6320-00-186-6452
NSN 5950-01-426-8810
NSN 6145-01-592-2722
NSN 5990-01-538-0923
NSN 5998-00-840-8974
NSN 5998-01-655-1792
NSN 5975-00-929-1515