The Gear Cluster, cataloged under National Stock Number 3020-01-074-4773, 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 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-074-4773 |
| Primary Part Number | 142D5654 |
| 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 | 0.487 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.7500 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Counterbore Nominal Diameter | 1.1000 INCHES SECOND END IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.650 INCHES IN |
| Material Document and Classification | ASTMA322 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA331 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN FIRST END |
| Spline Quantity | 15 SECOND END |
| Hub Nominal Length | 0.3000 INCHES FIRST END IN |
| Hub Nominal Length | 0.740 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 1.8260 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 3.1550 INCHES SECOND GEAR IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 4140 OVERALL |
| Counterbore Nominal Depth | 0.730 INCHES SECOND END IN |
| Spline Pitch Diameter | 0.4688 INCHES NOMINAL SECOND END IN |
| 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 |
|---|---|
| 142D5654 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 132D1936 | 5/9 Secondary reference General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
NSN 3020-01-074-4773 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 3020-01-074-4773 has 1 manufacturer part number on file: 142D5654 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 142D5654: Bore Nominal Diameter: 0.487 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.7500 INCHES BETWEEN FIRST AND SECOND GEAR IN; Counterbore Nominal Diameter: 1.1000 INCHES SECOND END IN; Design Type: SPUR SECOND GEAR. 20 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.