Model: 21FC624

Hexagon Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Nut Style

Hexagon

Nut Height

Between 0.454 inches and 0.469 inches

End Application

W/s: helicopter, chinook, ch-47; aircraft, phantom f-4; aviation engine test systems (aets); aircraft, mh-47e spercial operations aircraft; ah-64-d longbow; aircraft, (ac-130h, mc-130h, ec-130e, hc-130); helicopter, apache ah-64; helicopter, rh-53; engine, aircraft t-56

Width Across Flats

Between 0.553 inches and 0.564 inches

Tempurature Rating

550.0 degrees fahrenheit

Thread Series

Unf

Thready Qty Per Inch (tpi)

Thread Size

0.375 inches

Bearing Surface Type

Chamfered

Bearing Surface Finish

125.0 microinches

Material

Steel comp 1137

Material Specification

Ams 5024 assn standard single material response

Surface Treatment

Cadmium

Surface Treatment Specification

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

NSN

5310-00-531-0113

Part Number

21FC624

Description

Nut,self-locking,hexagon

CAGE

56878

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part 21FC624 NSN 5310-00-531-0113

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05277

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

Pricing & Availability Check

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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