316 stainless steel; .25 tube end connects to inverted nut with sleeve
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 5930-01-056-6295
NSN 5945-01-450-7516
NSN 5835-00-540-9669
NSN 5935-01-157-9572
NSN 6150-01-036-6547
NSN 5945-01-564-1703
NSN 5999-01-490-1779
NSN 6105-00-516-2151
NSN 5905-01-411-6204
NSN 5998-01-525-5794
NSN 6135-01-530-8136
NSN 5975-01-010-4887