Model: MS21258-55

Key Washer

Properties:

Hole Diameter
Between 3.443 inches and 3.453 inches
Outside Diameter
Between 4.720 inches and 4.780 inches
Internal Straight Key Width
Between 0.271 inches and 0.291 inches
Distance From Centerline To Top Of Internal Key
Between 1.552 inches and 1.562 inches
Internal Key Quantity
1
Material Thickness
Between 0.120 inches and 0.130 inches
Material
Steel comp 1018 or steel comp 1020 or steel comp 1025
Material Specification
Astm a108 assn standard all material responses
Surface Treatment
Cadmium or zinc
Style Designator
Key
NSN
5310-01-208-4146
Part Number
MS21258-55
Description
Washer,key
CAGE
80205

A washer of nonresilient material usually having two parallel bearing surfaces. The outside and/or inside edges have one or more protuberances. The ends and/or edges may be prebent at any angle or the protuberances may be prebent at any angle to the bearing surfaces. The keys or lugs may be fitted into keyways in adjacent material or they may be bent over after application to hold or lock one or more items in place. Excludes thrust type washer.

Part MS21258-55 NSN 5310-01-208-4146

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01869
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:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
50.0
WCC:
573
TCC:
Z
SHC:
Z
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 7318220000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Washers other than lock washers, iron or steel

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