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 6130-01-181-3373
NSN 5835-01-286-6499
NSN 5996-00-879-4654
NSN 6610-01-158-6540
NSN 5945-00-738-2522
NSN 5999-01-555-1148
NSN 6150-01-651-1697
NSN 4140-01-329-7381
NSN 5965-01-200-6613
NSN 5895-01-152-6033
NSN 4140-01-097-7320
NSN 5965-01-192-8989