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.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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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

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