The Gear Sector,spur, cataloged under National Stock Number 3020-01-199-8116, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-199-8116 |
| Primary Part Number | 1079-501-42 PIECE 18 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
| Status | ACTIVE |
| Teeth Quantity | 52 |
| Mounting Hole Type and Quantity | 3 PLAIN AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Nominal Diameter | 0.344 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Overall Length | 0.500 INCHES IN |
| Material Document and Classification | QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| Pitch Radius | 3.2500 INCHES NOMINAL IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | NICKEL ALLOY 400 OVERALL |
| Bolt Hole Circle Nominal Diameter | 0.375 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.375 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 |
|---|---|
| 1079-501-42 PIECE 18 PRIMARY | Huntington Ingalls Incorporated Div Ingalls Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| SSN593-501-1863225 PIECE 18 | 5/2 Secondary reference U.S. Government activity |
| SSN593-501-1863225 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-199-8116 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 3020-01-199-8116 has 1 manufacturer part number on file: 1079-501-42 PIECE 18 (Huntington Ingalls Incorporated Div Ingalls Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-199-8160. Verify interchangeability with system specifications before substitution.
Key specifications for 1079-501-42 PIECE 18: Teeth Quantity: 52; Mounting Hole Type and Quantity: 3 PLAIN AXIALLY THROUGH BODY FIRST END; Mounting Hole Nominal Diameter: 0.344 INCHES AXIALLY THROUGH BODY FIRST END IN; Nominal Overall Length: 0.500 INCHES IN. 12 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.