Model: 31A8126

Key Washer

Special Features:

Internal pre-bent key 180 degrees from second external key

Properties:

Hole Diameter
Between 1.317 inches and 1.323 inches
Outside Diameter
Between 1.406 inches and 1.469 inches
Internal Prebent Key Length
0.062 inches
External Straight Key Width
0.090 inches
Internal Prebent Key Width
Between 0.105 inches and 0.120 inches
Overall Distance Including Keys
1.1531 inches
External Key Quantity
4
Material Thickness
Between 0.014 inches and 0.016 inches
Angle Between First And Second Key
22.5 degrees
Angle Between Second And Third Key
22.5 degrees
External Prebent Key Angle
90.0 degrees
Angle Between Third And Fourth Key
22.5 degrees
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 4130
Material Specification
Mil-s-18729 military specification single material response
Surface Treatment
Cadmium
Style Designator
Key
NSN
5310-00-639-3563
Part Number
31A8126
Description
Washer,key
CAGE
15280

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 31A8126 NSN 5310-00-639-3563

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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