643241

View detailed technical data, stock status, and sourcing information for: 643241
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Federal Supply Group

Mechanical Power Transmission Equipment

Federal Supply Classification

3040 Miscellaneous Power Transmission Equipment

National Stock Number

3040-00-769-7421

Item Name Code

22109

Assigment Date

01/01/1962 (64 years ago)

A cylindrical item having a full 360 degree (6.282 radians) complement of teeth on two or more surfaces. It may be a one-piece casting or composed of two or more separate items firmly held together by welding, rivets, pins, or the like, to form a single unit. It is designed to mount on a shaft. For items consisting of a shaft with an integral complement(s) or gear teeth, see gearshaft (as modified). Excludes:gear subassembly, speed decreaser.

8.203 inches nominal overall length, not identical end similarity, plain first end style, 0.7650 inches nominal first end diameter, flat grooved second end style

Product Characteristics

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

First End Style: plain
End Similarity: not identical
Second End Style: flat grooved
Overall Length: 8.203 inches nominal
First End Diameter: 0.7650 inches nominal
Second End Distance From End To Flat: 0.172 inches nominal
Second End Diameter: 0.7650 inches nominal
Second End Grooved Flat Length: 0.0780 inches nominal
Material: steel
Material Document And Classification: fed std 66,aisi/sae 4027 fed spec single material response

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2520-00-025-6518	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
0-411	Straight Shaft
640412	Straight Shaft
643241	Straight Shaft
7697421	Straight Shaft
T90A3	Straight Shaft

FAQs

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

What is the FSCG of the NSN 3040-00-769-7421?

The FSCG of the NSN 3040-00-769-7421 is 3040

Does the NSN 3040-00-769-7421 have a Schedule B code assigned?

Yes, the Schedule B code is 8483105000

Does NSN 3040-00-769-7421 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 3040-00-769-7421 contain precious materials?

Precious metal content is unknown

Does NSN 3040-00-769-7421 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 3040-00-769-7421 was assigned to the Federal Catalog?

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