The Gear,spur, cataloged under National Stock Number 3020-00-012-5908, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Astronautics Corporation of America. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-012-5908 |
| Primary Part Number | 101491 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Astronautics Corporation of America |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.8200 INCHES COUNTERBORE FIRST END IN |
| Teeth Quantity | 144 |
| Surface Treatment Document and Classification | MIL-STD-171,FINISH NO.5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 0.3260 INCHES COUNTERBORE FIRST END IN |
| Flange Nominal Thickness | 0.035 INCHES IN |
| Flange Nominal Diameter | 3.494 INCHES IN |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Mounting Hole Type and Quantity | 4 PLAIN AXIALLY THROUGH FLANGE |
| Mounting Hole Nominal Diameter | 0.023 INCHES AXIALLY THROUGH FLANGE IN |
| Style Designator | FLANGED END |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Distance Between Outer Body Face and Inner Flange Face | 0.347 INCHES IN |
| Nominal Outside Diameter | 3.0407 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Bolt Hole Circle Nominal Diameter | 1.714 INCHES AND 1.720 INCHES AXIALLY THROUGH FLANGE IN |
| Counterbore Nominal Depth | 0.1870 INCHES COUNTERBORE FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.105 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 101491 PRIMARY | Astronautics Corporation of America (USA) |
NSN 3020-00-012-5908 is a Gear,spur, manufactured by Astronautics Corporation of America, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-012-5908 has 1 manufacturer part number on file: 101491 (Astronautics Corporation of America).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-649-4586. Verify interchangeability with system specifications before substitution.
Key specifications for 101491: Bore Nominal Diameter: 2.8200 INCHES COUNTERBORE FIRST END IN; Teeth Quantity: 144; Surface Treatment Document and Classification: MIL-STD-171,FINISH NO.5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL; Body Style: PLAIN, SOLID. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 3020-00-012-5908 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.