Model: H39557-4

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Washer Outside Diameter
0.406 inches
Overall Height
0.212 inches
Nut Style
Hexagon
End Application
Used on f22 sentry aircraft
Width Across Flats
0.309 inches
Thread Series
Unjf
Thread Size
0.250 inches
Material
Stainless steel
NSN
5310-01-181-1124
Part Number
H39557-4
Description
Nut,self-locking,extended Washer
CAGE
15653

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part H39557-4 NSN 5310-01-181-1124

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29730
FIIG:
A021A0
Concept No.:
1
App. Key:
BT
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:
A
ESD:
A
MMAC:
CRITL:
X

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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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