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Tube To Boss Tee

Model / MPN: ER783D12 | NSN: 4730-00-640-5119
ITAR Registered seal

A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The tube connectio (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.

Product Details
NATO Stock Number
4730-00-640-5119
Sold in multiples of
1 EA
DEMIL
NO
Thread Class
3a 2nd end
Thread Class
3a 1st end
Thread Class
3a 1st end bulkhead
Thread Class
3b 3rd end
Maximum Operating Temp
275.0 degrees fahrenheit single response
End Application
Used on boeing vertol cargo transport helicopter, model ch-47
Connection Style
External seat for gasket seal (boss) 2nd end
Connection Style
Flareless (tube) 1st end
Connection Style
Gasket seal (boss) 3rd end
Leg Length
1.344 inches 3rd end
Leg Length
1.641 inches 2nd end
Leg Length
2.438 inches 1st end
Connection Type
Threaded external boss 2nd end
Connection Type
Threaded external tube 1st end
Connection Type
Threaded internal boss 3rd end
Thready Qty Per Inch (tpi)
12 1st end bulkhead
Thready Qty Per Inch (tpi)
12 all ends
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
1.062 inches 1st end bulkhead
Thread Size
1.062 inches all ends
Seat Angle
12.0 degrees 1st end
Outside Diameter Tube Accommodated
0.750 inches 1st end
Material
Aluminum alloy 2014 or aluminum alloy 2024
Material Specification
Qq-a-225/4, t6 federal specification 1st material response or qq-a-2256, t6 federal specification 2nd material response
Media For Which Designed
Air 2nd response
Media For Which Designed
Hydraulic fluid 1st response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2, class 1 military specification single treatment response
Thread Series Designator
Unj 1st end bulkhead
Thread Series Designator
Unj all ends
Specification Data
96906-ms21910 government standard
783D Series Parts
Solicitations
Solicitation Description Qty UOM Close Date
SPE7M317T8120 Tee, Tube To Boss 24 EA 09/18/2017
SPE7M319T8847 Tee, Tube To Boss 31 EA 05/03/2019

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ER783D12 Cross Reference
  • MS21910D12