Model: 178397

Lock Washer

Properties:

Hole Diameter

Between 0.221 inches and 0.231 inches

Outside Diameter

Between 0.670 inches and 0.690 inches

Material Thickness

Between 0.032 inches and 0.040 inches

Hardness Rating

Between 40.0 rockwell c and 50.0 rockwell c

Material

Steel comp 1060 or steel comp 1070 or steel comp 1078 or steel comp 1080

Material Specification

Astm a576 assn standard all material responses

Surface Treatment

Cadmium or zinc

Style Designator

Flat external and internal teeth

NSN

5310-00-017-8397

Part Number

178397

Description

Washer,lock

CAGE

7X677

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 178397 NSN 5310-00-017-8397

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

14218

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

194160

UFC:

55210

LTL:

50.0

LCL:

50.0

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318210000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel