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 5990-00-258-0228
NSN 5915-00-054-0437
NSN 6135-00-542-6216
NSN 6620-01-633-8443
NSN 6610-00-870-7714
NSN 5935-01-332-5744
NSN 6110-01-633-9660
NSN 7035-00-064-7008
NSN 5930-01-006-9888
NSN 2925-01-270-1124
NSN 2925-01-354-1752
NSN 5935-01-021-1160