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 5996-01-323-6008
NSN 5950-00-965-6992
NSN 5925-01-099-8361
NSN 5835-01-236-6514
NSN 5965-00-834-6298
NSN 5935-01-469-6380
NSN 5996-01-275-9251
NSN 6130-01-068-4002
NSN 5985-00-942-1154
NSN 6620-01-371-5040
NSN 6320-00-036-3688
NSN 5915-01-070-4088