4B1191

View detailed technical data, stock status, and sourcing information for: 4B1191
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Federal Supply Group

Mechanical Power Transmission Equipment

Federal Supply Classification

3020 Gears, Pulleys, Sprockets and Transmission Chain

National Stock Number

3020-00-278-7623

Item Name Code

05466

Assigment Date

01/01/1961 (65 years ago)

56 teeth quantity, 82.9 rockwell b minimum and 96.4 rockwell b maximum overall hardness rating, webbed, solid body style, 7.0000 inches nominal pitch diameter, w/ keyway both ends bore style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Body Style: webbed, solid
Pitch Diameter: 7.0000 inches nominal
Teeth Quantity: 56
Bore Style: w/ keyway both ends
Hardness Rating: 82.9 rockwell b minimum and 96.4 rockwell b maximum overall
Nominal Outside Diameter: 7.247 inches
Tooth Form: standard
Pressure Angle: 20.0000 degrees
Nominal Distance Between Body Face And Protruding Hub End: 0.812 inches first end
Nominal Distance Between Body Face And Recessed Hub End: 0.375 inches second end
Face Nominal Width: 1.000 inches
Bore Nominal Diameter: 1.250 inches both ends
Keyway Nominal Width: 0.243 inches both ends
Nominal Distance From Bore Center To Keyway Bottom: 0.741 inches both ends
Hub Style Designator: 2 steps first end
Hub Style Designator: plain second end
Hub Nominal Diameter: 2.125 inches second end
End Nominal Length: 0.062 inches first end
End Nominal Diameter: 1.500 inches first end
First Step Nominal Length: 0.250 inches first end
First Step Nominal Diameter: 1.750 inches first end
Second Step Nominal Length: 0.499 inches first end
Second Step Nominal Diameter: 2.125 inches first end
Material: steel comp 1045 overall
Material Document And Classification: fed std 66 fed spec single material response overall
Style Designator: one protruding hub, one recessed hub

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2815-00-012-0469	No Name Available	05/23/1966
2910-00-363-6412	No Name Available	01/01/1963

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
4B1191	Spur Gear

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 3020-00-278-7623?

The FSCG of the NSN 3020-00-278-7623 is 3020

Does the NSN 3020-00-278-7623 have a Schedule B code assigned?

Yes, the Schedule B code is 8483409000

Does NSN 3020-00-278-7623 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 3020-00-278-7623 contain precious materials?

Precious metal content is unknown

Does NSN 3020-00-278-7623 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 3020-00-278-7623 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961