Smic is qf, which is non-critical
An adapter having machine threads (straight threads other than pipe or hose series) designed to accommodate a tube on one end or an unthreaded end designed to accommodate a tube. The other end has external or internal machine threads (straight threads other than pipe or hose series) and is designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. It is designed to join a tube or tube fitting to a boss or boss fitting in a straight line on items such as tanks, housings, valve fittings, and the like. See also coupling, tube and nipple, tube.
NSN 6110-01-577-2571
NSN 6135-00-816-9052
NSN 5925-00-085-9076
NSN 5905-01-100-4629
NSN 5960-00-879-1930
NSN 6645-01-564-7129
NSN 5935-01-634-0668
NSN 5925-00-155-2587
NSN 5998-01-235-9437
NSN 5920-00-686-0374
NSN 6610-01-473-5678
NSN 5895-01-473-6834