Model: MIL-H-81581/3

Air Breat Air Duct Hose Assembly
Description:

Round cross-sectional shape style, 0.188 inches wall thickness, 0.250 inches first end inside diameter, coupling first end connection type.

Properties:

Cross Sectional Shape
Round
Wall Thickness
0.188 inches
Inside Diameter
0.250 inches first end
Hose Weight
0.100 ounces per linear foot
Connection Type
Coupling first end
Maximum Operating Pressure
70.0 pounds per square inch
Thread Size
0.500 inches both ends
Measuring Method And Length
36.000 inches
Coupling Style
Threaded internal first end
Material
Aluminum alloy 1st end coupling
Material
Plastic polyethylene terephthalate 2nd ply
Material
Rubber silicone class q 1st ply
Material
Steel reinforcing wire
Material Specification
Qq-a-225/6, alloy 2024, t4 federal specification single material response 1st end coupling
Surface Treatment
Anodize 1st end coupling
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response 1st end coupling
Thread Series Designator
Unjf both ends
Specification Data
80206-33c1204 government standard
Fsc Application Data
Aircraft oxygen breathing system
Departure From Cited Document
Clean for oxygen use
NSN
1660-00-021-1019
Part Number
MIL-H-81581/3
Description
Hose Assembly,air Duct,air Breat
CAGE

A length of hose, air duct, air breathing which may have end couplings on one or both end/or incorporates a communication cable. It is designed for use in breathing oxygen system, air line masks, gas masks, and the like. Excludes items which include the branch or fork hoses; assemblies made up of the oxygen breathing hose, communication cable, wiring for face mask heater, and vent and pressure ducts for the anti-gsuit and hose assembly, nonmetallic.

Part MIL-H-81581/3 NSN 1660-00-021-1019

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
30600
FIIG:
A229A0
Concept No.:
App. Key:
A
Cond. Code:
2
Status:
A

Material Classification

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

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Schedule B and Export
  • Schedule B: 8803300060
  • SITC: 79295
  • End Use: Parts for military-type goods
  • NAICS: 336413
  • USDA: 1

Freight Class: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)

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