Model: KFN644-9

Extended Washer Self-locking Nut

Special Features:

Deformed to produce self-locking action

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Washer Outside Diameter

Between 0.870 inches and 0.880 inches

Overall Height

0.670 inches

Nut Style

Spline drive

Drive Point Quantity

Washer Thickness

Between 0.140 inches and 0.150 inches

End Application

A-10 thunderbolt

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

0.5625 inches

Material

Steel

Surface Treatment

Cadmium and chromate

NSN

5310-01-493-4442

Part Number

KFN644-9

Description

Nut,self-locking,extended Washer

CAGE

15653

A nut, circular in shape, having wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery. It has an integral washer which extends beyond the wrenching element periphery and an integral feature is incorporated for locking on the threads of a mating member.

Part KFN644-9 NSN 5310-01-493-4442

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

36744

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

576

TCC:

SHC:

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