The Gear Cluster, cataloged under National Stock Number 3020-01-102-2512, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-102-2512 |
| Primary Part Number | 70351-08114-103 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 8.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 10.125 INCHES FIRST END IN |
| Design Type | BEVEL SECOND GEAR |
| Design Type | BEVEL FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.240 INCHES IN |
| Criticality Code Justification | FEAT |
| Hub Style Designator | PLAIN FIRST END |
| Hub Nominal Length | 0.080 INCHES FIRST END IN |
| Nominal Outside Diameter | 18.1000 INCHES FIRST GEAR IN |
| Nominal Outside Diameter | 19.2800 INCHES SECOND GEAR IN |
| Material | STEEL OVERALL |
| Construction | SOLID |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 70351-08114-103 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 70351-08114-103 | Heligear Canada Acquisitioncorporationdba Northstar Aerospace Inc (milton) (CAN) |
| Reference | Meaning |
|---|---|
| 70351-08114-103 | 5/9 Secondary reference Speco Corp |
NSN 3020-01-102-2512 is a Gear Cluster, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-102-2512 has 2 manufacturer part numbers on file: 70351-08114-103 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 70351-08114-103 (Heligear Canada Acquisitioncorporationdba Northstar Aerospace Inc (milton)).
Key specifications for 70351-08114-103: Bore Nominal Diameter: 8.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 10.125 INCHES FIRST END IN; Design Type: BEVEL SECOND GEAR; Design Type: BEVEL 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 3020-01-102-2512 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.