The Gear Sector,spur, cataloged under National Stock Number 3020-01-151-4498, 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 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-151-4498 |
| Primary Part Number | 518-4674791 ITEM 8 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.754 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.2260 INCHES FIRST END IN |
| Teeth Quantity | 14 |
| Nominal Outside Radius | 1.8635 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.2210 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-C-465,ALLOY 630 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Arc Nominal Length | 1.8700 INCHES IN |
| Pitch Radius | 1.8180 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 0.154 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 518-4674791 ITEM 8 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 87624-1506 ITEM 8 | 3/2 Design control — primary reference U.S. Government activity |
| 518-4674791 | D/9 Drawing number reference only U.S. Government activity |
| 518-4674791 ITEM 8 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-151-4498 is a Gear Sector,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-151-4498 has 1 manufacturer part number on file: 518-4674791 ITEM 8 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-151-5668, 3020-01-154-2133. Verify interchangeability with system specifications before substitution.
Key specifications for 518-4674791 ITEM 8: Bore Nominal Diameter: 1.754 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.2260 INCHES FIRST END IN; Teeth Quantity: 14; Nominal Outside Radius: 1.8635 INCHES IN. 15 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.
NSN 3020-01-151-4498 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.