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.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
50.0
WCC:
713
TCC:
Z
SHC:
9
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

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