A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The tube connection(s) has machine threads (straight threads other than pipe or hose series) designed to accommodate a tube, or is unthreaded and designed to accommodate a tube. The boss connection(s) 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 may have side inlet(s). It is used as a junction at the intersection of a tube or fitting and a boss or boss fitting on items such as a tank, housing, valve fitting, or the like. See also tee, tube; and tee, pipe to tube. Excludes connector, multiple, fluid pressure line.
Dept. of the Air Force 
Dept. of the Navy 
Brazil 
Canada 
Republic of Korea Classification: Aluminum tube or pipe fittings (couplings,elbows sleeves)
NSN 2925-01-359-4027
NSN 6150-01-357-6518
NSN 5975-00-216-4848
NSN 6130-01-288-8312
NSN 6105-01-058-9015
NSN 6320-00-578-6898
NSN 6145-01-622-7742
NSN 5930-00-079-6856
NSN 5985-01-077-4995
NSN 5935-01-551-9176
NSN 6645-01-331-0774
NSN 5905-01-343-2329