Model: 21738-3

Boss Tee

Special Features:

Mounting holes in 2 cornors 0.218 in.Min dia, 0.226 in.Max dia, lockwire holes 0.057 in.Dia in each corner

Properties:

Thread Class
2b all ends
Connection Style
Gasket seal (boss) all ends
Leg Length
0.683 inches 2nd end
Leg Length
0.863 inches 3rd end and 0.873 inches 3rd end
Leg Length
0.967 inches 1st end
Connection Type
Threaded internal boss all ends
Thread Size
0.250 inches all ends
Material
Aluminum alloy 6061
Material Specification
Qq-a-225/8, t651 federal specification single material response
Media For Which Designed
Fluid single response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2, class 2 military specification single treatment response
Thread Series Designator
Unf all ends
NSN
4730-00-201-9591
Part Number
21738-3
Description
Tee,boss
CAGE

A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The connections have external or internal machine threads (straight threads other than pipe or hose series), and are 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 boss or boss fitting on items such as tanks, housings, valve fittings, and the like. Excludes tee, tube.

Part 21738-3 NSN 4730-00-201-9591

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22680
FIIG:
A080B0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
F

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051400
UFC:
29700
LTL:
77.5
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7609000000
  • SITC: 68427
  • End Use: Finished metal shapes
  • NAICS: 332919
  • USDA: 1

Freight Class: Aluminum tube or pipe fittings (couplings,elbows sleeves)

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