The Gear Cluster, cataloged under National Stock Number 3020-00-296-3201, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-296-3201 |
| Primary Part Number | 139C6526 |
| 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 | 2.483 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.482 INCHES SECOND END IN |
| Design Type | SPUR ALL GEARS |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.660 INCHES IN |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | 2 STEPS SECOND END |
| Spline Quantity | 19 BOTH ENDS |
| Hub Nominal Length | 0.230 INCHES SECOND END IN |
| Nominal Outside Diameter | 4.469 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 4.550 INCHES FIRST GEAR IN |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OVERALL |
| Spline Pitch Diameter | 0.5938 INCHES NOMINAL BOTH ENDS IN |
| Construction | ASSEMBLED |
| 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 |
|---|---|
| 139C6526 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 3020PL0959331 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-00-296-3201 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 3020-00-296-3201 has 1 manufacturer part number on file: 139C6526 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 139C6526: Bore Nominal Diameter: 2.483 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.482 INCHES SECOND END IN; Design Type: SPUR ALL GEARS; Bore Style: INVOLUTE SPLINE BOTH ENDS. 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 3020-00-296-3201 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.