Model: 421-4-25303-000

Lock Washer

Properties:

Hole Diameter

Between 5.1 millimeters and 5.3 millimeters

Outside Diameter

Between 8.7 millimeters and 9.0 millimeters

Material Thickness

0.51 millimeters

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Surface Treatment

Zinc and passivate

Style Designator

Flat external teeth

NSN

5310-01-362-1473

Part Number

421-4-25303-000

Description

Washer,lock

CAGE

99207

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 421-4-25303-000 NSN 5310-01-362-1473

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

14218

FIIG:

A022B0

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:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318210000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel