Model: 20-21

Spur Gear

Properties:

Body Style
Plain, solid
End Application
Nimitz class cvn
Pitch Diameter
3.3250 inches
Teeth Quantity
39
Bore Style
10b w/ 2 keyways both ends
Hardness Rating
45.0 rockwell c and 50.0 rockwell c
Outside Diameter
3.4050 inches
Pressure Angle
20.0000 degrees
Face Width
0.7500 inches
Bore Diameter
1.1270 inches both ends
Keyway Width
0.251 inches both ends
Distance From Bore Center To Keyway Bottom
0.6800 inches both ends
Precision Classification
Quality number 8
Part Name Assigned By Controlling Agency
Gear-output mar 100, 120, 160, 250, 1600, 4000
Material
Steel comp 4340
Material Specification
Aisi 4340 assn standard single material response
Style Designator
Hubless
NSN
3020-01-490-7364
Part Number
20-21
Description
Gear,spur
CAGE
1MEG0

A gear, cylindrical in form, with straight teeth on the outer surface parallel to the axis of the gear. See also gear, antibacklash, spur. For bulk material, see rod, pinion.

Part 20-21 NSN 3020-01-490-7364

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05466
FIIG:
A27300
Concept No.:
1
App. Key:
AH
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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197337
UFC:
96690
LTL:
RATING VARIABLE
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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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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