Model: 503B4-91-2

Lock Washer

Properties:

Hole Diameter

Between 0.383 inches and 0.398 inches

Outside Diameter

0.692 inches

Material Thickness

0.036 inches

Material

Copper alloy

Surface Treatment

Cadmium and chromate

Style Designator

Flat internal teeth

Nondefinitive Specification/std Data

A type

Departure From Cited Document

As modified by surface finish

NSN

5310-00-209-2028

Part Number

503B4-91-2

Description

Washer,lock

CAGE

94033

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 503B4-91-2 NSN 5310-00-209-2028

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:

194120

UFC:

95100

LTL:

RATING VARIABLE

LCL:

70.0

WCC:

713

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 7415210000
SITC: 69432
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Copper washers including spring washers not threaded