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 6320-00-593-0379
NSN 6150-01-487-1699
NSN 6220-01-506-8787
NSN 5935-00-584-4584
NSN 5910-00-991-1780
NSN 5975-01-607-7925
NSN 6650-01-475-3714
NSN 5990-01-354-8965
NSN 5960-01-322-8417
NSN 5910-01-254-8449
NSN 6645-01-633-1852
NSN 4140-00-596-4726