Helical Gear NSN 3020-00-391-0921

Item Description

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:

NSN: 3020-00-391-0921

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Features and Characteristics

Body Style

Webbed, with lightening holes

Attachment Method

Mounting hole

Pitch Diameter

10.8000 inches

Teeth Quantity

Bore Style

Plain both ends

Mounting Hole Thread Series Designator

Unf axially through hub, first end

Mounting Hole Thready Qty Per Inch (tpi)

20 axially through hub, first end

Hardness Rating

10.0 rockwell c and 16.0 rockwell c

Mounting Hole Thread Size

0.500 inches axially through hub, first end

Mounting Hole Type And Quantity

4 threaded axially through hub, first end

Outside Diameter

11.0858 inches

Teeth Type

Single helix

Tooth Form

Standard

Tooth Direction

Left

Pressure Angle

20.0000 degrees

Helix Angle

27.3217 degrees

Distance Between Body Face And Recessed Hub End

0.438 inches both ends

Face Width

1.500 inches

Bore Diameter

4.001 inches both ends

Hub Style Designator

Plain both ends

Hub Diameter

6.000 inches second end

Bolt Hole Circle Diameter

5.000 inches axially through hub, first end

Material

Steel

Material Specification

Mil-s-890, class b military specification single material response

Style Designator

Recessed hubs

FSC

3020 Transmission Chain Sprockets Pulleys Gears

NIIN

003910921

NSN

3020003910921

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

3237629

Cage Code:

55380

Status:

MSDS:

Part Number:

3148009

Cage Code:

53711

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 8483409000
NAICS: 333612
SITC: 74840
Description: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately
End Use (Code 21180):
Industrial machines, other

Q & A

Frequently asked questions for NSN 3020-00-391-0921

What are the manufacturers of nsn 3020003910921?

Does this nsn 3020003910921 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 3020003910921
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:

Does nsn 3020003910921 contain any precious metals?
Precious metal content is unknown.

Does nsn 3020003910921 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 3020003910921?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

05464

FIIG:

A27300

App. Key:

Cond. Code:

Status:

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Certificate of Conformance
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