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

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)

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.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

194160

UFC:

55210

LTL:

50.0

LCL:

50.0

WCC:

713

TCC:

SHC:

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