AT90A8

View detailed technical data, stock status, and sourcing information for: AT90A8
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for part AT90A8 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Mechanical Power Transmission Equipment

Federal Supply Classification

3020 Gears, Pulleys, Sprockets and Transmission Chain

National Stock Number

3020-00-769-7422

Item Name Code

36636

Assigment Date

01/01/1962 (64 years ago)

plain both ends bore style, spur fourth gear design type, helical first gear design type, helical second gear design type, spur third gear design type

Product Characteristics

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

Bore Style: plain both ends
Design Type: helical first gear
Design Type: helical second gear
Design Type: spur fourth gear
Design Type: spur third gear
Construction: solid
Nominal Outside Diameter: 1.970 inches fourth gear
Nominal Outside Diameter: 2.575 inches third gear
Nominal Outside Diameter: 3.470 inches second gear
Nominal Outside Diameter: 4.070 inches first gear
Nominal Overall Length: 6.886 inches
Hub Nominal Length: 0.218 inches between second and third gear
Hub Nominal Length: 0.857 inches between third and fourth gear
Hub Nominal Length: 1.904 inches between first and second gear
Hub Nominal Length: 0.045 inches first end
Bore Nominal Diameter: 1.063 inches both ends
Hub Style Designator: plain between first and second gear
Hub Style Designator: plain between second and third gear
Hub Style Designator: plain between third and fourth gear
Hub Style Designator: plain first end
Hub Nominal Diameter: 1.425 inches between third and fourth gear
Hub Nominal Diameter: 1.688 inches between first and second gear
Hub Nominal Diameter: 1.875 inches between second and third gear
Hub Nominal Diameter: 2.625 inches first end
Material: steel comp 4027 overall
Material Document And Classification: fed std 66 fed std single material response and aisi/sae 4027 assn std single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2520-00-646-7047	No Name Available	12/06/1972

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
640405	Gear Cluster
7697422	Gear Cluster
906200	Gear Cluster
AT90A8	Gear Cluster
T90A8	Gear Cluster

FAQs

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

What is the FSCG of the NSN 3020-00-769-7422?

The FSCG of the NSN 3020-00-769-7422 is 3020

Does the NSN 3020-00-769-7422 have a Schedule B code assigned?

Yes, the Schedule B code is 8483409000

Does NSN 3020-00-769-7422 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 3020-00-769-7422 contain precious materials?

Precious metal content is unknown

Does NSN 3020-00-769-7422 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 3020-00-769-7422 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962