The Gear Sector,spur, cataloged under National Stock Number 3020-00-440-4582, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 26 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 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 | 3020-00-440-4582 |
| Primary Part Number | 1175673 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.125 INCHES BOTH ENDS IN |
| Teeth Quantity | 74 |
| Surface Treatment Document and Classification | MIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Outside Radius | 2.800 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.875 INCHES FIRST END IN |
| First Step Nominal Length | 0.563 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 6 OR QUALITY NUMBER 7 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-C-390,ALLOY D5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 3.375 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.112 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.312 INCHES FIRST END IN |
| Arc Nominal Length | 5.812 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pitch Radius | 2.7750 INCHES NOMINAL IN |
| End Nominal Diameter | 3.344 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY 903 OVERALL |
| Bolt Hole Circle Nominal Diameter | 6.000 INCHES AXIALLY THROUGH FLANGE IN |
| Mounting Hole Thread Series Designator | UNF TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.187 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 |
|---|---|
| 1175673 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-440-4582 is a Gear Sector,spur, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-440-4582 has 1 manufacturer part number on file: 1175673 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 6220-01-528-4686. Verify interchangeability with system specifications before substitution.
Key specifications for 1175673: Bore Nominal Diameter: 3.125 INCHES BOTH ENDS IN; Teeth Quantity: 74; Surface Treatment Document and Classification: MIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Nominal Outside Radius: 2.800 INCHES IN. 26 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.