SR42A4-144

View detailed technical data, stock status, and sourcing information for: SR42A4-144
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Federal Supply Group

Mechanical Power Transmission Equipment

Federal Supply Classification

3020 Gears, Pulleys, Sprockets and Transmission Chain

National Stock Number

3020-00-836-8284

Item Name Code

05466

Assigment Date

12/05/1966 (59 years ago)

plain, solid body style, mounting hole attachment method, 144 teeth quantity, 3.0000 inches nominal pitch diameter, plain 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: plain, solid
Attachment Method: mounting hole
Pitch Diameter: 3.0000 inches nominal
Teeth Quantity: 144
Bore Style: plain both ends
Mounting Hole Thread Series Designator: unc transversely through hub, first end
Mounting Hole Thread Quantity Per Inch: 32 transversely through hub, first end
Mounting Hole Nominal Thread Size: 0.138 inches transversely through hub, first end
Mounting Hole Type And Quantity: 1 threaded transversely through hub, first end
Nominal Outside Diameter: 3.042 inches
Nominal Overall Length: 0.343 inches
Tooth Form: standard
Pressure Angle: 20.0000 degrees
Nominal Distance Between Body Face And Protruding Hub End: 0.228 inches first end
Face Nominal Width: 0.112 inches
Bore Nominal Diameter: 0.250 inches both ends
Hub Style Designator: pinned first end
Hub Nominal Diameter: 0.500 inches first end
Material: aluminum alloy overall
Surface Treatment: anodize overall
Style Designator: protruding hub

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
3020-00-837-0838	No Name Available	05/11/1967

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
SR42A4-144	Spur Gear

FAQs

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

What is the FSCG of the NSN 3020-00-836-8284?

The FSCG of the NSN 3020-00-836-8284 is 3020

Does the NSN 3020-00-836-8284 have a Schedule B code assigned?

Yes, the Schedule B code is 8483409000

Does NSN 3020-00-836-8284 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 3020-00-836-8284 contain precious materials?

Precious metal content is unknown

Does NSN 3020-00-836-8284 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 3020-00-836-8284 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Mon, Dec 5, 1966