The Gear Cluster, cataloged under National Stock Number 3020-01-073-0053, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-073-0053 |
| Primary Part Number | 12271181 |
| 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 |
| Design Type | SPUR ALL GEARS |
| Nominal Overall Length | 1.235 INCHES IN |
| Nominal Outside Diameter | 1.930 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.312 INCHES FIRST GEAR IN |
| Material | STEEL OVERALL |
| Construction | SOLID |
| 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 |
|---|---|
| 12271181 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 3-140-215-09 PRIMARY | G M Vacuum Coating Laboratory Inc (USA) |
| Reference | Meaning |
|---|---|
| 3-140-215-05 | 5/2 Secondary reference U.S. Government activity |
| 12286506 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 3020-01-073-0053 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 3020-01-073-0053 has 2 manufacturer part numbers on file: 12271181 (U S Army Tank Automotive Command Amsta-Im-Mm), 3-140-215-09 (G M Vacuum Coating Laboratory Inc).
Key specifications for 12271181: Design Type: SPUR ALL GEARS; Nominal Overall Length: 1.235 INCHES IN; Nominal Outside Diameter: 1.930 INCHES SECOND GEAR IN; Nominal Outside Diameter: 2.312 INCHES FIRST GEAR IN. 6 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.