The Gear,worm Wheel, cataloged under National Stock Number 3020-01-446-7820, 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 Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-446-7820 |
| Primary Part Number | 123-4403536 PART 4 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.625 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.625 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 4.500 INCHES BOTH ENDS IN |
| Teeth Quantity | 40 |
| Tooth Direction | RIGHT |
| Bore Style | W/ 2 KEYWAYS BOTH ENDS |
| Throat Nominal Radius | 1.572 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | FLUSH HUB |
| Material Document and Classification | QQ-C-390, C7, TYI FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 12.6050 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 13.550 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.624 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 2.625 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 |
|---|---|
| 123-4403535 PART 10 | Naval Sea Systems Command (USA) |
| 123-4403536 PART 4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H600-1502-79 PART 10 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4403536 | D/9 Drawing number reference only Naval Sea Systems Command |
| 4403535 | D/9 Drawing number reference only Naval Sea Systems Command |
| H600-1502-80 PART 4 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3020-01-446-7820 is a Gear,worm Wheel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-446-7820 has 2 manufacturer part numbers on file: 123-4403535 PART 10 (Naval Sea Systems Command), 123-4403536 PART 4 (Naval Sea Systems Command).
Key specifications for 123-4403536 PART 4: Keyway Nominal Width: 0.625 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.625 INCHES BOTH ENDS IN; Hub Nominal Diameter: 4.500 INCHES BOTH ENDS IN; Teeth Quantity: 40. 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.