The Gear Sector,spur, cataloged under National Stock Number 3020-01-121-9830, 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 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-121-9830 |
| Primary Part Number | 123-4775444ITEM8 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Teeth Quantity | 12 |
| Material | STEEL OVERALL |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 123-4775444ITEM8 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 87542-1705 | D/9 Drawing number reference only U.S. Government activity |
| 87542-1705ITEM8 | 3/2 Design control — primary reference U.S. Government activity |
| 4775444-0008 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 123-4775444 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-121-9830 is a Gear Sector,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-121-9830 has 1 manufacturer part number on file: 123-4775444ITEM8 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-123-2201, 3040-01-278-7485. Verify interchangeability with system specifications before substitution.
Key specifications for 123-4775444ITEM8: Teeth Quantity: 12; Special Features: 6 THREADED MTG HOLES,UNC THD SERIES,0.250 IN. NOM THD DIA; 20 SCREW THD QTY PER IN. IN; Material: STEEL OVERALL; Attachment Method: MOUNTING HOLE. 3 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.