The Gear,spur, cataloged under National Stock Number 3020-01-181-6489, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-181-6489 |
| Primary Part Number | 7708356 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Teeth Quantity | 58 |
| Body Style | PLAIN, SOLID |
| Nominal Overall Length | 0.751 INCHES IN |
| Criticality Code Justification | FEAT |
| Style Designator | PLAIN RING |
| Pitch Diameter | 5.8000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 6.655 INCHES IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 8620 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 7708356 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 7708356 | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| Reference | Meaning |
|---|---|
| 720046 | 5/9 Secondary reference Bae Systems Land & Armaments L.p. Dba Use CAGE Code 05386 for Cataloging |
| 7708356 | 5/9 Secondary reference Bae Systems Land & Armaments L.p. Dba Use CAGE Code 05386 for Cataloging |
NSN 3020-01-181-6489 is a Gear,spur, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-181-6489 has 2 manufacturer part numbers on file: 7708356 (U S Army Tank Automotive Command Amsta-Im-Mm), 7708356 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-615-6257. Verify interchangeability with system specifications before substitution.
Key specifications for 7708356: Teeth Quantity: 58; Body Style: PLAIN, SOLID; Nominal Overall Length: 0.751 INCHES IN; Criticality Code Justification: FEAT. 9 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.
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.