Model: 1881B255

Key Washer

Properties:

Hole Diameter

3.795 inches

Outside Diameter

4.125 inches

Internal Straight Key Width

Between 0.490 inches and 0.495 inches

Distance From Centerline To Top Of Internal Key

Between 1.381 inches and 1.386 inches

Internal Key Quantity

Material Thickness

0.280 inches

Surface Finish

125.0 microinches all surfaces

Material

Steel comp 4340

Material Specification

Mil-s-8844, class 1 military specification single material response

Surface Treatment

Chromium

Surface Treatment Specification

Qq-c-320, class 2 federal specification single treatment response

Style Designator

Key

NSN

5310-01-187-3922

Part Number

1881B255

Description

Washer,key

CAGE

13002

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 1881B255 NSN 5310-01-187-3922

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

01869

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:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Trailers/Vehicles

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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