Model: 431138

Square Plain Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Nut Style
Square
Nut Height
Between 0.270 inches and 0.290 inches
End Application
W/s: engine, aircraft, tf33-100 (e3a/b/c); engine, aircraft, tf-33-p-7 (c-121a/b); engine, aircraft, tf33-p-3/5/9 (c/ec-135, b-52h); engine, aircraft, tf33-pw-102 (c-135e, ec-135h/k/p)
Width Across Flats
Between 0.730 inches and 0.740 inches
Thread Series
Unf
Thready Qty Per Inch (tpi)
24
Hardness Rating
Between 32.0 rockwell c and 38.0 rockwell c
Thread Size
0.312 inches
Countersink Angle
85.0 degrees nut and 95.0 degrees nut
Bearing Surface Type
Chamfered
Material
Steel comp 8740
Material Specification
Ams 6322 assn standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Ams 2400 assn standard single treatment response
NSN
5310-00-862-7902
Part Number
431138
Description
Nut,plain,square
CAGE
97139

A nut, flat on top and bottom, having 4 flat sides. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 431138 NSN 5310-00-862-7902

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01858
FIIG:
A021A0
Concept No.:
1
App. Key:
AG
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:
E
LVL_B:

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: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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