The Gear,spur, cataloged under National Stock Number 3020-01-487-3603, 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 Huntington Ingalls Inc Div Newport News Shipbuilding. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-487-3603 |
| Primary Part Number | 518-5004109 ITEM 3901 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.626 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.1250 INCHES FIRST END IN |
| Hub Nominal Diameter | 1.2500 INCHES SECOND END IN |
| Teeth Quantity | 69 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.8125 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.2505 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 2.8750 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 2.9580 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Face Nominal Width | 0.1870 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 |
|---|---|
| 2014-82 ITEM 39 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 518-5004109 ITEM 3901 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 5004109 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 518-5004109 ITEM 39 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2014-82 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3020-01-487-3603 is a Gear,spur, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-487-3603 has 2 manufacturer part numbers on file: 2014-82 ITEM 39 (Huntington Ingalls Inc Div Newport News Shipbuilding), 518-5004109 ITEM 3901 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-487-3615. Verify interchangeability with system specifications before substitution.
Key specifications for 518-5004109 ITEM 3901: Bore Nominal Diameter: 0.626 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.1250 INCHES FIRST END IN; Hub Nominal Diameter: 1.2500 INCHES SECOND END IN; Teeth Quantity: 69. 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.