The Gear Cluster, cataloged under National Stock Number 3020-01-120-4571, 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 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-120-4571 |
| Primary Part Number | 132D1930 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.598 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.840 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.720 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Overall Length | 0.900 INCHES IN |
| Criticality Code Justification | FEAT |
| Material Document and Classification | MIL-T-9047,COMP 6,COND TN MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN BETWEEN FIRST AND SECOND GEAR |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 18 BOTH ENDS |
| Hub Nominal Length | 0.110 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Hub Nominal Length | 0.4100 INCHES FIRST END IN |
| Nominal Outside Diameter | 3.1010 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 3.9230 INCHES FIRST GEAR IN |
| Material | TITANIUM ALLOY OVERALL |
| Spline Pitch Diameter | 0.5625 INCHES NOMINAL BOTH ENDS IN |
| Construction | ASSEMBLED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 132D1930 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 132D1930 | 5/9 Secondary reference Astro Gear and Instrument Co Inc |
| 10106655 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 3020-01-120-4571 is a Gear Cluster, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-120-4571 has 1 manufacturer part number on file: 132D1930 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 132D1930: Bore Nominal Diameter: 0.598 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.840 INCHES FIRST END IN; Hub Nominal Diameter: 2.720 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: SPUR SECOND GEAR. 19 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 3020-01-120-4571 has DEMIL Code B. 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.