Model: 03A231-4-4L

Plate Self-locking Nut

Special Features:

height is 0.745 in. Max

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Counterbore Diameter
0.300 inches first end
Lubrication
Dry film lubricant
Mounting Hole Diameter
Between 0.098 inches and 0.103 inches
Nut Style
Plate
Nut Length
1.050 inches
Nut Height
0.485 inches
Plate Thickness
0.035 inches
Nut Counterbore Depth
0.250 inches first end
Nut Mounting Provision
Straight holes
Mounting Hole Arrangement Style
2 holes
Distance From Aperture Center To Mounting Hole Center
Between 0.495 inches and 0.505 inches
Center To Center Distance Between Mounting Holes Along Width
Between 0.705 inches and 0.707 inches
End Application
B-2 aircraft
Thread Series
Unjf
Features Provided
Floating nut
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Material
Iron alloy 660 nut
Material
Iron alloy 660 shell
Material
Iron alloy 660 washer
Material
Rubber silicone class q seal or rubber fluorosilicone class fq seal
Material Specification
Ams 3304 assn standard 1st material response seal or mil-r-25988 military specification 2nd material response seal
Material Specification
Ams 5525 assn standard single material response nut or ams 5731 assn standard single material response nut or ams 5737 assn standard single material response nut
Material Specification
Ams 5525 assn standard single material response shell or ams 5731 assn standard single material response shell or ams 5737 assn standard single material response shell
Material Specification
Ams 5525 assn standard single material response washer or ams 5731 assn standard single material response washer or ams 5737 assn standard single material response washer
Surface Treatment
Passivate nut
Surface Treatment
Passivate shell
Surface Treatment
Passivate washer
Surface Treatment Specification
Qq-p-35 federal specification single treatment response nut
Surface Treatment Specification
Qq-p-35 federal specification single treatment response shell
Surface Treatment Specification
Qq-p-35 federal specification single treatment response washer
NSN
5310-01-533-3186
Part Number
03A231-4-4L
Description
Nut,self-locking,plate
CAGE

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

Part 03A231-4-4L NSN 5310-01-533-3186

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05280
FIIG:
A021A0
Concept No.:
1
App. Key:
BZ
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:
FW
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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