Model: 21433-11

Boss Reducer

Special Features:

Differentiated by altered item drawing cage 51998 (universal propulsion co., inc

Properties:

Thread Class
3a 2nd end
Thread Class
3a 1st end
Reducer Type
Concentric
End Application
Aircraft; av-8b, a-7, tav-8b, ta-7
Connection Style
Flared w/ gasket seal (boss) 1st end
Connection Style
Plain (tube) 2nd end
Connection Type
Threaded external tube 1st end
Connection Type
Threaded external tube 2nd end
Thread Size
0.375 inches 2nd end
Thread Size
0.438 inches 1st end
Outside Diameter Tube Accommodated
0.188 inches 2nd end
Outside Diameter Tube Accommodated
0.250 inches 1st end
Nominallength
1.100 inches
Material
Steel comp 304
Surface Treatment
Passivate
Special Test Features
Differentiated by second end altered by removing flared tube portion; gasket seal one end only; 88044-an919-2 (mod) govt standard.
Surface Treatment Specification
Mil-s-5002 military specification single treatment response
Thread Series Designator
Unf 1st end
Thread Series Designator
Unf 2nd end
NSN
4730-01-392-2426
Part Number
21433-11
Description
Reducer,boss
CAGE
31218

A straight fitting having a boss connection of a different size at each end. Both 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. Excludes bushing (as modified).

Part 21433-11 NSN 4730-01-392-2426

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
23541
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:
X

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:
051420
UFC:
29090
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 7307994000
  • SITC: 67959
  • End Use: Iron and steel products, other
  • NAICS: 332919
  • USDA: 1

Freight Class: Other fittings nesoi of alloy steel not stainless

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