The Gear Cluster, cataloged under National Stock Number 3020-01-287-3979, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-287-3979 |
| Primary Part Number | 12350648 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Hub Nominal Diameter | 3.741 INCHES SECOND END IN |
| Hub Nominal Diameter | 4.331 INCHES FIRST END IN |
| Design Type | SPUR ALL GEARS |
| Nominal Overall Length | 7.530 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 1.032 INCHES FIRST END IN |
| Hub Nominal Length | 1.218 INCHES SECOND END IN |
| Nominal Outside Diameter | 5.800 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 9.870 INCHES FIRST GEAR IN |
| Material | STEEL COMP 4320H OVERALL |
| Construction | WELDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12350648 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 10395950 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 3020-01-287-3979 is a Gear Cluster, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-287-3979 has 1 manufacturer part number on file: 12350648 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12350648: Hub Nominal Diameter: 3.741 INCHES SECOND END IN; Hub Nominal Diameter: 4.331 INCHES FIRST END IN; Design Type: SPUR ALL GEARS; Nominal Overall Length: 7.530 INCHES IN. 12 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.