Special o-ring material, per mil-p-5510c, do not dupe to any other nsn
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.
Classification: Other fittings nesoi of iron or nonalloy steel
NSN 6130-00-091-6118
NSN 5905-00-259-0644
NSN 5996-01-107-7824
NSN 6645-01-426-8621
NSN 5985-01-196-6144
NSN 6610-00-021-2259
NSN 6135-00-309-0074
NSN 5945-01-319-6633
NSN 6110-01-064-6483
NSN 5835-00-415-6421
NSN 5895-01-468-2068
NSN 5945-01-566-0471