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 4140-01-228-9602
NSN 6145-01-398-1299
NSN 6620-00-248-9513
NSN 5960-01-577-5682
NSN 5895-01-215-0303
NSN 5985-00-181-8848
NSN 5915-01-633-9845
NSN 6105-01-254-9781
NSN 5975-01-444-6289
NSN 5920-01-551-5340
NSN 6220-01-530-9918
NSN 5905-01-087-4474