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 5999-01-383-7795
NSN 6150-00-020-6386
NSN 5965-00-888-2643
NSN 6130-01-050-5980
NSN 6620-01-215-0470
NSN 5915-01-166-4333
NSN 6240-01-195-6650
NSN 6135-01-579-3534
NSN 6110-01-210-3412
NSN 6645-01-143-0137
NSN 5935-01-471-5838
NSN 5965-00-242-8039