Model: 624-3920-001

Helical Gear

Properties:

Body Style
Webbed, solid
Pitch Diameter
Between 2.4920 inches and 2.5080 inches
Teeth Quantity
20
Bore Style
10a w/ keyway both ends
Teeth Type
Single helix
Tooth Form
Stub
Pressure Angle
20.0000 degrees
Face Width
0.375 inches
Bore Diameter
0.5000 inches both ends
Keyway Width
0.125 inches both ends
Distance From Bore Center To Keyway Bottom
0.280 inches both ends
Material
Aluminum alloy 2024
Material Specification
Qq-a-250/4 federal specification single material response
Surface Treatment
Chromate
Surface Treatment Specification
Mil-c-5541 military specification single treatment response
Style Designator
Hubless
NSN
3020-01-272-0478
Part Number
624-3920-001
Description
Gear,helical
CAGE
13499

A gear, cylindrical in form, with teeth on the outer surface at an angle to the axis of the gear. See also gear, antibacklash, helical:

Part 624-3920-001 NSN 3020-01-272-0478

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05464
FIIG:
A27300
Concept No.:
1
App. Key:
AF
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

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Schedule B and Export
  • Schedule B: 8483409000
  • SITC: 74840
  • End Use: Industrial machines, other
  • NAICS: 333612
  • USDA: 1

Freight Class: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately

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