Model: G30-4CB

Lock Washer

Properties:

Hole Diameter

Between 0.116 inches and 0.123 inches

Outside Diameter

Between 0.255 inches and 0.270 inches

Material Thickness

Between 0.014 inches and 0.018 inches

Hardness Rating

Between 85.0 rockwell b and 95.0 rockwell b

Material

Copper alloy 240 or copper alloy 425

Material Specification

Qq-b-750 federal specification 1st material response or astm b36 uns c24000 assn standard 1st material response or cda 425 assn standard 2nd material response or astm b591 uns c42500 assn standard 2nd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-b-426, type 2, class 3 federal specification all treatment responses

Style Designator

Flat internal teeth

Specification Data

81348-ff-w-100 government specification and 88044-an936/canceled/ government standard

Nondefinitive Specification/std Data

1 type and a grade and 1 style and 3 composition or 4 composition

Departure From Cited Document

As modified by cadmium w/ chromate plating

NSN

5310-00-638-4552

Part Number

G30-4CB

Description

Washer,lock

CAGE

06481

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 G30-4CB NSN 5310-00-638-4552

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

Freight Class: Copper washers including spring washers not threaded