Model: 12387327-28

Flat Washer

Properties:

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.521 inches and 0.541 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
Between 0.202 inches and 0.216 inches
Overall Diameter
Between 1.990 inches and 2.010 inches
End Application
Mrap - unique nsn - used on 2 mrap variants
Hardness Rating
Between 33.0 rockwell c and 38.0 rockwell c
Material
Steel comp 4130 or steel comp 4140 or steel comp 8640 or steel comp 8740
Material Specification
A829 assn standard 1st material response or a322 assn standard 1st material response or a331 assn standard 1st material response or ams 6350 assn standard 1st material response or ams 6351 assn standard 1st material response or ams 6345 assn standard 1st material response or a829 assn standard 2nd material response or a322 assn standard 2nd material response or a331 assn standard 2nd material response or a829 assn standard 3rd material response or a322 assn standard 3rd material response or a331 assn standard 3rd material response or a322 assn standard 4th material response or a331 assn standard 4th material response
Surface Treatment
Zinc
Surface Treatment Specification
Mil-std-171, 1.9.2.2 military standard single treatment response and astm b633, ty ii, cl 2 assn standard single treatment response
NSN
5310-01-566-9850
Part Number
12387327-28
Description
Washer,flat
CAGE

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes disk, valve, graphite impregnated and lubricated items.

Part 12387327-28 NSN 5310-01-566-9850

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
13393
FIIG:
A022B0
Concept No.:
1
App. Key:
B
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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
044120
UFC:
23490
LTL:
70.0
LCL:
--
WCC:
596
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8710000090
  • SITC: 89111
  • End Use: Military trucks, armored vehicles, etc.
  • NAICS: 336992
  • USDA: 1

Freight Class: Parts of armored fighting vehicles,motorized, whether or not fitted with weapons

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