Model: 28L078-4

Key Washer

Properties:

Hole Diameter

Between 0.801 inches and 0.816 inches

Outside Diameter

Between 1.110 inches and 1.140 inches

Internal Prebent Key Length

Between 0.062 inches and 0.093 inches

External Prebent Key Width

Between 0.146 inches and 0.166 inches

Internal Prebent Key Width

Between 0.156 inches and 0.176 inches

Overall Distance Including Keys

1.531 inches

External Key Quantity

Material Thickness

Between 0.038 inches and 0.046 inches

Hardness Rating

Between 50.0 rockwell b and 81.0 rockwell b

Material

Steel comp 1010 or steel comp 1012 or steel comp 1015 or steel comp 1016 or steel comp 1017 or steel comp 1018 or steel comp 1019 or steel comp 1020 or steel comp 1021 or steel comp 1022 or steel comp 1026 or steel comp 1527 or steel comp 1029 or steel comp 1030 or steel comp 1035 or steel comp 1023 or steel comp 1524 or steel comp 1025

Material

Material Specification

66 federal standard all material responses

Surface Treatment

Cadmium or zinc

Surface Treatment Specification

Qq-p-416 ty2 cl3 federal specification 1st treatment response or qq-z-325 ty2 cl3 federal specification 2nd treatment response

Style Designator

Key

NSN

5310-00-226-5978

Part Number

28L078-4

Description

Washer,key

CAGE

15090

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 28L078-4 NSN 5310-00-226-5978

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:

0.1000lbs

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:

194160

UFC:

55210

LTL:

50.0

LCL:

WCC:

573

TCC:

SHC:

ACC:

Trailers/Vehicles

End Items End applications NSN 5310-00-226-5978 is a component of

Main Feed Pumps
Jp-5 Aviation Fuels Systems
Fire Pumps
Stream (std. Tensioned Replenishment At Sea Method)
Model 28 Teletype
5-inch 38 Caliber Twin Gun Mount Mk 28
Los Angeles Class Ssn (688)
Sturgeon Class Ssn (637)
Ticonderoga Class Cg (47)
004320004
Tank Truck
010297347
Tank Truck
000632862
Aircraft Mooring Tie Down
006213794
Displacement Gyroscope
010382991
Radar Set

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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