The Gear Cluster, cataloged under National Stock Number 3020-01-055-4231, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-055-4231 |
| Primary Part Number | 105D3895 |
| 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 | 1.160 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.4300 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Counterbore Nominal Diameter | 1.2603 INCHES BOTH ENDS IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Hardness Rating | 35.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Overall Length | 1.180 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Nominal Length | 0.080 INCHES FIRST END IN |
| Hub Nominal Length | 0.200 INCHES BETWEEN FIRST AND SECOND GEAR IN |
| Nominal Outside Diameter | 2.5870 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 2.9125 INCHES FIRST GEAR IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.357 INCHES BOTH ENDS 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 |
NSN 3020-01-055-4231 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 3020-01-055-4231 has 2 manufacturer part numbers on file: 105D3895 (U.s.a. Spares Inc.), 105D3895 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 105D3895: Bore Nominal Diameter: 1.160 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.4300 INCHES BETWEEN FIRST AND SECOND GEAR IN; Counterbore Nominal Diameter: 1.2603 INCHES BOTH ENDS IN; Design Type: SPUR SECOND GEAR. 17 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.