The Gear Sector,helical, cataloged under National Stock Number 3020-01-487-8204, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-487-8204 |
| Primary Part Number | 124-2266898 P/N 01 |
| Item Name | Gear Sector,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Helix Angle | 45.0000 DEGREES |
| Hub Nominal Diameter | 2.750 INCHES FIRST END IN |
| Hub Nominal Diameter | 3.000 INCHES SECOND END IN |
| Teeth Quantity | 16 |
| Nominal Outside Radius | 7.1410 INCHES IN |
| Bore Style | SQUARE BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | BACK HUB PROTRUDING |
| Material Document and Classification | MIL-B-16522, CL-1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STUB |
| Bore Nominal Width | 1.125 INCHES BOTH ENDS IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Arc Nominal Length | 10.9375 INCHES IN |
| Pitch Radius | 7.0000 INCHES NOMINAL IN |
| Material | COPPER ALLOY 862 OR COPPER ALLOY 863 OVERALL |
| Face Nominal Width | 1.9375 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 |
|---|---|
| 124-2266898 P/N 01 PRIMARY | Naval Sea Systems Command (USA) |
| 124-2266888 P/N 33 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2266898 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2266888 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-487-8204 is a Gear Sector,helical, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-487-8204 has 2 manufacturer part numbers on file: 124-2266898 P/N 01 (Naval Sea Systems Command), 124-2266888 P/N 33 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5342-01-495-7027. Verify interchangeability with system specifications before substitution.
Key specifications for 124-2266898 P/N 01: Helix Angle: 45.0000 DEGREES; Hub Nominal Diameter: 2.750 INCHES FIRST END IN; Hub Nominal Diameter: 3.000 INCHES SECOND END IN; Teeth Quantity: 16. 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.