Model: KFN542-4S

Assembled Washe Self-locking Nut

Special Features:

Washer rockwell c scale 40.0 min and 45.0 maxz use with k-fast automatic tool

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Free-running all metal design
Washer Outside Diameter
0.460 inches
Counterbore Diameter
0.283 inches and 0.288 inches nut
Overall Height
0.280 inches
Nut Style
Flat with turned up edge
Nut Counterbore Depth
0.087 inches and 0.097 inches nut
Width Across Flats
Between 0.306 inches and 0.313 inches
Tempurature Rating
450.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
Between 39.0 rockwell c and 43.0 rockwell c
Thread Size
0.250 inches
Material
Steel comp e4340 or steel comp 4140 or steel comp 8740 nut
Material
Steel washer
Material Specification
Mil-s-5000 military specification 1st material response or mil-s-5626 military specification 2nd material response or mil-s-6049 military specification 3rd material response nut
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response
NSN
5310-01-221-7020
Part Number
KFN542-4S
Description
Nut,self-locking,assembled Washe
CAGE
15653

A nut on which has been assembled a nonremovable washer. An integral feature is incorporated for locking on the threads of a mating member.

Part KFN542-4S NSN 5310-01-221-7020

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29736
FIIG:
A021A0
Concept No.:
1
App. Key:
BG
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:
JH
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
50.0
WCC:
713
TCC:
Z
SHC:
Z
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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