26-309

View detailed technical data, stock status, and sourcing information for: 26-309
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Federal Supply Group

Mechanical Power Transmission Equipment

Federal Supply Classification

3020 Gears, Pulleys, Sprockets and Transmission Chain

National Stock Number

3020-00-448-3473

Item Name Code

05464

Assigment Date

01/01/1963 (63 years ago)

27 teeth quantity, w/ keyway both ends bore style, 3.4999 inches nominal pitch diameter, plain, solid body style, 19.0 rockwell c minimum and 26.0 rockwell c maximum overall hardness rating

Product Characteristics

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

Body Style: plain, solid
Pitch Diameter: 3.4999 inches nominal
Teeth Quantity: 27
Bore Style: w/ keyway both ends
Hardness Rating: 19.0 rockwell c minimum and 26.0 rockwell c maximum overall
Nominal Outside Diameter: 3.720 inches
Teeth Type: single helix
Tooth Form: standard
Tooth Direction: left
Pressure Angle: 14.5000 degrees
Helix Angle: 31.0000 degrees
Face Nominal Width: 0.875 inches
Bore Nominal Diameter: 1.500 inches both ends
Keyway Nominal Width: 0.157 inches both ends
Nominal Distance From Bore Center To Keyway Bottom: 0.832 inches both ends
Special Features: stamp timing mark on centerline of tooth 141 deg 45 min from center line of keyway
Material: steel comp 1040 overall
Material Document And Classification: 66 fed std single material response and aisi/sae 1040 assn std single material response overall
Style Designator: hubless

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2805-00-528-7123	No Name Available	01/01/1960
2805-00-536-8483	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
26-309	Helical Gear

FAQs

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

What is the FSCG of the NSN 3020-00-448-3473?

The FSCG of the NSN 3020-00-448-3473 is 3020

Does the NSN 3020-00-448-3473 have a Schedule B code assigned?

Yes, the Schedule B code is 8483409000

Does NSN 3020-00-448-3473 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 3020-00-448-3473 contain precious materials?

Precious metal content is unknown

Does NSN 3020-00-448-3473 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 3020-00-448-3473 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963