Model: KFN673-4

Hexago Extended Washer Plain Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Washer Outside Diameter
Between 0.408 inches and 0.412 inches
Lubrication
Dry film lubricant
Overall Height
0.275 inches
Nut Style
Hexagon
Washer Thickness
Between 0.085 inches and 0.095 inches
End Application
Cl-125, aircraft
Width Across Flats
Between 0.305 inches and 0.313 inches
Thread Series
Unjc
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Material
Stainless steel
Material Specification
Ams5639 assn standard single material response or ams5697 assn standard single material response or ams5686 assn standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416 federal specification single treatment response
NSN
5310-01-513-9863
Part Number
KFN673-4
Description
Nut,plain,extended Washer,hexago
CAGE

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.

Part KFN673-4 NSN 5310-01-513-9863

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
04889
FIIG:
A021A0
Concept No.:
1
App. Key:
AP
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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