The Gear Sector,spur, cataloged under National Stock Number 3020-01-210-4361, 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 Huntington Ingalls Incorporated Div Ingalls Shipbuilding. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-210-4361 |
| Primary Part Number | 1079-501-39 PIECE6 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| Status | ACTIVE |
| Hub Nominal Diameter | 2.500 INCHES FIRST END IN |
| Teeth Quantity | 21 |
| Nominal Outside Radius | 1.913 INCHES IN |
| Bore Style | SQUARE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.125 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Tooth Form | STANDARD |
| Bore Nominal Width | 0.562 INCHES BOTH ENDS IN |
| Hub Style Designator | PLAIN FIRST END |
| Pitch Radius | 1.1500 INCHES NOMINAL IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | BRONZE OVERALL |
| Face Nominal Width | 0.437 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 |
|---|---|
| 1079-501-39 PIECE6 PRIMARY | Huntington Ingalls Incorporated Div Ingalls Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 1079-501-39 | D/9 Drawing number reference only Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
NSN 3020-01-210-4361 is a Gear Sector,spur, manufactured by Huntington Ingalls Incorporated Div Ingalls Shipbuilding, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-210-4361 has 1 manufacturer part number on file: 1079-501-39 PIECE6 (Huntington Ingalls Incorporated Div Ingalls Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-213-8125. Verify interchangeability with system specifications before substitution.
Key specifications for 1079-501-39 PIECE6: Hub Nominal Diameter: 2.500 INCHES FIRST END IN; Teeth Quantity: 21; Nominal Outside Radius: 1.913 INCHES IN; Bore Style: SQUARE BOTH ENDS. 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.