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 7035-01-310-2587
NSN 5895-01-199-5599
NSN 6620-01-457-7277
NSN 7035-01-423-8343
NSN 5935-01-357-5577
NSN 5855-00-361-0167
NSN 5945-01-644-1301
NSN 4140-00-997-2596
NSN 6685-01-565-8753
NSN 6645-01-578-7959
NSN 5998-01-297-3772
NSN 5990-01-090-3232