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

19207

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.:

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:

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:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

044120

UFC:

23490

LTL:

70.0

LCL:

WCC:

596

TCC:

SHC:

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