Matl is monel
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 5990-00-263-1289
NSN 6320-00-394-8458
NSN 5960-01-122-2686
NSN 5998-01-333-1980
NSN 5915-01-357-4228
NSN 6130-00-583-9925
NSN 5945-00-872-4049
NSN 5960-01-595-6515
NSN 6240-01-188-7282
NSN 7035-01-479-5268
NSN 2925-01-097-0903
NSN 6110-01-556-6862