The Gear,spur, cataloged under National Stock Number 3020-01-307-8878, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-307-8878 |
| Primary Part Number | 298378-10 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Keyway Nominal Width | 0.126 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.499 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.812 INCHES FIRST END IN |
| Teeth Quantity | 42 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.562 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 1.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 1.833 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.176 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.188 INCHES IN |
| 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 |
|---|---|
| 298378-10 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| T-8003158-10 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 298378 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-01-307-8878 is a Gear,spur, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-307-8878 has 2 manufacturer part numbers on file: 298378-10 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), T-8003158-10 (Lockheed Martin Corporation Div Rms).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-309-5008. Verify interchangeability with system specifications before substitution.
Key specifications for 298378-10: Keyway Nominal Width: 0.126 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.499 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.812 INCHES FIRST END IN; Teeth Quantity: 42. 16 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.