The Gear Cluster, cataloged under National Stock Number 3020-00-877-3514, 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 Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-877-3514 |
| Primary Part Number | 6791857 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.391 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Nominal Overall Length | 1.385 INCHES IN |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | 1 STEP BOTH ENDS |
| Hub Nominal Length | 0.375 INCHES FIRST END IN |
| Hub Nominal Length | 0.391 INCHES SECOND END IN |
| Hub Nominal Length | 0.203 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 1.125 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.250 INCHES FIRST GEAR IN |
| Surface Treatment | OXIDE OVERALL |
| Material | STEEL OVERALL |
| Construction | SOLID |
| 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 |
|---|---|
| 6791857 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| 6791857 | 5/9 Secondary reference General Motors Corp |
NSN 3020-00-877-3514 is a Gear Cluster, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-877-3514 has 1 manufacturer part number on file: 6791857 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6791857: Hub Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.391 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR; Design Type: SPUR FIRST GEAR. 15 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 3020-00-877-3514 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.