1st end is swagelok 2t type.
No other part numbers with same form, fit, and function found.
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 alloy steel not stainless
NSN 5945-01-293-5042
NSN 6620-01-444-4048
NSN 5985-01-056-4850
NSN 6150-00-153-0298
NSN 7035-01-423-1755
NSN 6610-00-446-2880
NSN 6150-00-143-5168
NSN 6145-01-134-7598
NSN 7035-01-604-6339
NSN 5998-01-235-2362
NSN 6105-00-233-7312
NSN 5915-01-252-8683