Model: 312D1373-1

Tube Reducer

Special Features:

Hex nut width across flats 0.684 in. Min and 0.691 in. Max.

Properties:

Thread Class
3a 2nd end
Thread Class
3a 1st end
Reducer Type
Concentric
Connection Style
Flareless (tube) 1st end
Connection Style
Flareless (tube) 2nd end
Connection Type
Threaded external tube 1st end
Connection Type
Threaded external tube 2nd end
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.4375 inches 2nd end
Thread Size
0.5625 inches 1st end
Seat Angle
12.0 degrees 1st end
Seat Angle
12.0 degrees 2nd end
Outside Diameter Tube Accommodated
0.250 inches 2nd end
Outside Diameter Tube Accommodated
0.375 inches 1st end
Reduced Passage Inside Diameter
0.187 inches all ends
Nominallength
1.2188 inches
Material
Steel comp 347
Material Specification
Qq-s-763 federal specification single material response
Media For Which Designed
Hydraulic fluid single response
Surface Treatment
Passivate
Surface Treatment Specification
Mil-s-5002 military specification single treatment response
Thread Series Designator
Unjf 2nd end
Thread Series Designator
Unjf 1st end
NSN
4730-01-248-2250
Part Number
312D1373-1
Description
Reducer,tube
CAGE
81205

A straight tube fitting having a different size connection on each end. It is designed to join two tubes of different sizes. Excludes bushing (as modified).

Part 312D1373-1 NSN 4730-01-248-2250

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
08506
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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
052190
UFC:
30000
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
576
TCC:
Z
SHC:
Z
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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