Cleanliness shall be in accordance with mil-c-52211 for oxygen service
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.
NSN 5945-01-201-9436
NSN 6220-01-436-1156
NSN 6135-01-100-3593
NSN 6130-00-393-0645
NSN 5915-00-824-4688
NSN 6220-01-566-0985
NSN 5996-01-350-9551
NSN 5965-00-686-0957
NSN 6645-01-138-1683
NSN 5950-01-075-2955
NSN 5998-01-376-7223
NSN 6135-01-377-3862