Model: N18311

Tube Coupling Inverted Nut

Properties:

Thread Class
2a
Thread Direction
Right-hand
Fabrication Method
Bar stock, machined
Casehardening Indicator
Not casehardened
Overall Length
Between 0.625 inches and 0.656 inches
Thread Size
1/2-20
Tube Outside Diameter For Which Designed
0.312 inches
End Application
HARN-IS-CHF-EGER
Seat Angle In Deg
45.00
Screw Thread Series Designator
Unf
Width Across Flats
0.500 inches
Smallest Inside Diameter
Between 0.317 inches and 0.320 inches
Material
Steel
Material
Steel
Surface Treatment
Cadmium or chromate zinc
Style Designator
Inverted nut, tube, flare
Surface Treatment
Cadmium or zinc chromate
NSN
4730-00-013-7398
Part Number
N18311
Description
Inverted Nut,tube Coupling
CAGE
56442

An externally threaded fastening device which has an internal or external seat, designed to mate with the seat of an internally threaded tube fitting for the purpose of securing the tube to the fitting to form a leakproof connection.

Part N18311 NSN 4730-00-013-7398

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
03857
FIIG:
T385-B
Concept No.:
App. Key:
BA
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:
U
ESD:
ESD:
MMAC:
SX
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:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8710000090
  • SITC: 89111
  • End Use: Military trucks, armored vehicles, etc.
  • NAICS: 336992
  • USDA: 1

Freight Class: Parts of armored fighting vehicles,motorized, whether or not fitted with weapons

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