Model: 90900A030

Lock Washer

Properties:

Hole Diameter

0.255 inches

Outside Diameter

0.454 inches

Material Thickness

Between 0.020 inches and 0.025 inches

End Application

F-15sa

Countersink Angle

82.0 degrees

Part Name Assigned By Controlling Agency

External-tooth lock washer

Material

Steel comp 403 or steel comp 405 or steel comp 410

Style Designator

Countersink external teeth

NSN

5310-01-646-3089

Part Number

90900A030

Description

Washer,lock

CAGE

39428

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 90900A030 NSN 5310-01-646-3089

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:

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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