The Gear Sector,spur, cataloged under National Stock Number 3020-01-006-4789, 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 Northrop Grumman Support Services Corp. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-006-4789 |
| Primary Part Number | 343D223H01 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.375 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.3200 INCHES FIRST END IN |
| Backlash Designation | GRADE B |
| Teeth Quantity | 37 |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Outside Radius | 1.1875 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 | 0.2000 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-764,TYPE 303 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Nominal Thread Size | 0.164 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Arc Nominal Length | 2.4871 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pitch Radius | 1.6666 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.120 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 |
|---|---|
| 343D223 | Northrop Grumman Support Services Corp (USA) |
| 343D223H01 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 343D223 | 5/9 Secondary reference U.S. Government activity |
| 343D223H01 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-01-006-4789 is a Gear Sector,spur, manufactured by Northrop Grumman Support Services Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-006-4789 has 2 manufacturer part numbers on file: 343D223 (Northrop Grumman Support Services Corp), 343D223H01 (Northrop Grumman Support Services Corp).
Key specifications for 343D223H01: Bore Nominal Diameter: 0.375 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.3200 INCHES FIRST END IN; Backlash Designation: GRADE B; Teeth Quantity: 37. 23 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.