Model: 640231

Extended Washer Self-locking Nut

Special Features:

Chromic acid dipped

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Washer Outside Diameter

0.443 inches

Overall Height

Between 0.314 inches and 0.329 inches

Nut Style

Double hexagon

Washer Thickness

0.070 inches

End Application

W/s: aircraft, (ac-130h, mc-130h, ec-130e, hc-130); engine, aircraft tf33-pw-102 (c-135e, ec-135h/k/p); engine, aircraft tf33-p-3/5/9 (c/ec-135, b-52h); engine, aircraft, tf33-100 (e3a/b/c); joint stars target radar system; aircraft, stratofortress b-52; engine, aircraft, tf-33-p-7 (c-141a/b); aircraft, b-2 bomber (atb); engine, aircraft, f100-pw-200 (f-16a/b/c/d)

Width Across Flats

Between 0.367 inches and 0.376 inches

Tempurature Rating

550.0 degrees fahrenheit

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Thread Size

0.250 inches

Material

Steel comp 1137

Material Specification

Aisi1137 assn standard single material response or ams5024 assn standard single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 1, cl 3 federal specification single treatment response

NSN

5310-00-576-5559

Part Number

640231

Description

Nut,self-locking,extended Washer

CAGE

77445

A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part 640231 NSN 5310-00-576-5559

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29729

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:

0.1000lbs

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:

573

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