The Gear,bevel, cataloged under National Stock Number 3020-01-480-6520, 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 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-480-6520 |
| Primary Part Number | 124-1678562 PC 71 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Teeth Quantity | 18 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 40.5175 DEGREES |
| Nominal Distance Between Body Face and Protruding Hub End | 1.188 INCHES FIRST END IN |
| Teeth Type | BEVEL |
| Nominal Overall Length | 2.250 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Pitch Diameter | 3.6000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 4.000 INCHES IN |
| Pressure Angle | 45.0000 DEGREES |
| Material | STEEL OVERALL |
| Body Recess Nominal Depth | 1.188 INCHES SECOND END IN |
| Face Nominal Width | 1.000 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 |
|---|---|
| 124-1678564 PC 2 | Naval Sea Systems Command (USA) |
| 124-1678562 PC 71 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 124-1678562 | D/9 Drawing number reference only Naval Sea Systems Command |
| 124-1678564 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-480-6520 is a Gear,bevel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-480-6520 has 2 manufacturer part numbers on file: 124-1678564 PC 2 (Naval Sea Systems Command), 124-1678562 PC 71 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-481-1247. Verify interchangeability with system specifications before substitution.
Key specifications for 124-1678562 PC 71: Teeth Quantity: 18; Body Style: PLAIN, SOLID; Pitch Angle: 40.5175 DEGREES; Nominal Distance Between Body Face and Protruding Hub End: 1.188 INCHES FIRST END IN. 13 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.